©201 3

- 2014 DJI. All Rights Reserved. 1 

# A2 Flight Control System User Manual V 1. 20

A pril 201 5 Revision

Thank you for purchasing DJI products. Please strictly follow these steps to mount and connect this system on your aircraft, install the PC Assistant Software on your computer , as well as install ing the DJI Assistant App on your
mobile device

.

Please regularly check the web page of corresponding product s on our website 

## www.dji.com , which is updated regularly. Product information, technical updates and manual corrections will be av ailable on this website. Due to unforeseen changes or product upgrades, the information contained in this manual is subject to change
without notice.

* This manual is for basic assembly and configuration; you can obtain more details and advanced instructi ons when using the A ssistant S oftware. To assure you have the latest information, please visit our website and download the
latest manual and current software version.

If you have any problem s that you cannot solve during usage, please contact your author ized dealer.©201 3

- 2014 DJI. All Rights Reserved. 2 

## Content
INTRODUCTION
................................ ................................ ................................ .............. 4
P RODUCT 

## I NTRODUCTION


## ................................ ................................ ................................ ........ 4 I N THE 

## B O X


## ................................ ................................ ................................ ........................... 4 E QUIPMENT 

## P REPARED BY 

## U SERS


## ................................ ................................ .............................. 4 S YSTEM 

## I NTRODUCTION


## ................................ ................................ ................................ ........... 5 S YMBOL 

## I NSTRUCTION


## ................................ ................................ ................................ ............ 5
1 ASSEMBLY AND CONFI GURATION
................................ ................................ ................ 6
1.1 H ARDWARE 

## I NSTALLATION AND 

## C ONNECTION


## ................................ ................................ ........ 6 1.1.1 Mixer Type Supported

................................ ................................ ........................... 6 1.1.2 Hardware Connection Diagram

................................ ................................ ............. 7 1.1.3 Important for Assembly and Connect ion

................................ ............................... 7 1.2 S OFTWARE 

## I NSTALLATION AND 

## C ONFIGURATION


## ................................ ................................ ... 15 1.2.1 Installing Driver and Assistant Software

................................ ............................. 15 1.2.2 Configure using Assistant Software on a PC

................................ ........................ 16 1.2.3 Configure the control mode switch

................................ ................................ ..... 17 1.2.4 Configuration Checking

................................ ................................ ....................... 1 9 1.2.5 Tools

................................ ................................ ................................ .................... 20 1.3 C OMPASS 

## C ALIBRATION


## ................................ ................................ ................................ ... 22
2 BASIC FLYING
................................ ................................ ................................ ............. 23
2.1 C ONTROL 

## M ODE 

## I NSTRUCTION


## ................................ ................................ ......................... 23 2.2 F LYING 

## E NVIRONMENT 

## R EQUIREMENTS


## ................................ ................................ .............. 25 2.3 C HECK 

## L IST BEFORE 

## F LYING


## ................................ ................................ ............................... 25 2.4 P OWER ON AND 

## C HECK


## ................................ ................................ ................................ ... 26 2.5 S TART 

## M OTORS 

## M ETHODS


## ................................ ................................ ............................... 26 2.6 B ASIC 

## F LYING 

## T EST


## ................................ ................................ ................................ ......... 28
3 PROTECTION FUNCTIO NS SETTING
................................ ................................ ............ 30
3.1 F A IL 

## S AFE


## ................................ ................................ ................................ ...................... 30 3.2 L OW 

## V OLTAGE 

## P ROTECTION


## ................................ ................................ .............................. 31
4 ADVANCED FEATURES
................................ ................................ ................................ 33
4 .1 IOC (I NTELLIGENT 

## O RIENTATION 

## C ONTROL 

## ) FUNCTION


## ................................ .......................... 33 4.1.1IOC

................................ ................................ ................................ ........................ 33©201 3

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## 4.1.2 Cruise Control

................................ ................................ ................................ ...... 37 4.2 S ERVO 

## G IMBAL FUNCTION


## ................................ ................................ ................................ 39 4.3 F LIGHT 

## L IMITS


## ................................ ................................ ................................ ............... 39 4.3.1 Max Height, Radius Limits & Home Fence

................................ ........................... 39 4.3.2 Flight Limits of Special Areas

................................ ................................ ............... 41 4.3.3 Conditions of Flight Limits

................................ ................................ ................... 43 4.4 P

ARACHUTE 

## F UNCTION


## ................................ ................................ .............................. 44 4.5 G EAR FUNCTION


## ................................ ................................ ................................ ............ 44 4.6 A TTITUDE 

## C ONTROL 

## W HEN 

## O NE 

## M OTOR 

## O UTPUT 

## F AILS


## ................................ ........................ 45 4.7 DJI A SSISTANT 

## A PP 

## U SAGE


## ................................ ................................ ............................... 45
APPENDIX
................................ ................................ ................................ ..................... 48
LED INDICATOR DESCRIPTIO NS


## ................................ ................................ ................................ 48 S PECIFICATIONS


## ................................ ................................ ................................ ................... 49 FAQ
................................ ................................ ................................ .............................. 50
U SE WITH OTHER 

## DJI PRODUCTS


## ................................ ................................ ............................. 50 C HANNEL 

## M APPING 

## I NSTRUCTIONS FOR 

## PC A SSISTANT 

## S OFTWARE


## ................................ ................ 52 R ECOMMENDED 

## M APPING FOR 

## F UTABA 

## T RANSMITTER 

## (M ODE 

## 2) U SER


## ................................ ......... 54 S ETTINGS OF GAIN VALU ES FOR 

## Y OUR 

## R EFERENCE


## ................................ ................................ ....... 54 T HE 

## T RANSMITTER SETUP OF 

## FUTABA

................................ ................................ .................... 54
DISCLAIMER
................................ ................................ ................................ ................. 56
TRADEMARK
................................ ................................ ................................ ................ 56©201 3

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# Introduction Product Introduction

The DJI A2 Multi

- Rotor stabilization controller is a complete flight system for various multi

- rotor platform s for commercial and industrial aerial photography . Based on the technology and design philosophy of DJI’s Ace series of high

- performance controllers, the A2 offers you a brand new flight experience. Its flight mode provides
a seamless transition for curre nt Ace One, WKM AP professionals. A2 features includes : (1) I ntegrated with high

- precision sensor components and a high

- performance GPS R eceiver

. (2) U tilizes high quality components precisely calibrated with temperature compensation in all gyros and sensors, indu stry renowned flight algorithm in autopilot and UAV field. (3) Designed with b uilt

- in vibration absorption , no extra mount frame or vibration absorption pad is required. (4) P rovide high precision control and high performance handling experience. (5) Based on the DESS T technology , it has a built

- in 16

- channel Receiver, and supports DSM2 satellite receiver. (6) Optional DJI D

- BUS Adapter can be used with a traditional Receiver.



## In the Box

C ontroller Unit (Built

- in Receiver DR16) PMU(Power M anage ment unit) IMU(Inertia M ea surement U nit)

LED

- BT

- I GPS

- COMPASS PRO PLUS A ccessories M icro

- USB Cable (1) S ervo Cables (2) GPS Bracket D ouble side s t icky pads

. 

## Equipment Prepared by User s
Aircraft ( Take Quad

- rotor for example: Red is nose, and B lack is rear ) Transmitter ( Take Mode2 for example ) Others

Battery DJI D

- BUS Adapter Mobile Device©201 3

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## System Introduction The A2 flight control system use s the Controller Unit at its core, which is connected with the IMU, GPS

- COMPASS PRO PLUS 、 LED

- BT

- I 、 PMU and ESCs to complete the system. T he system can achieve the height

- lock and position

- lock functions by using the IMU and the GPS, to control the aircraft. Please carry out the following procedures to finish assembly, configurat ion and flight

- testing

.



## Symbol Instruction General Symbol

Forbidden(Important) Cautions Tip s Reference

GPS Satellite number D istance T X signal g ood T X signal lost

Roll to left Roll to right P itch up P itch down



## LED Symbol ( N ) N=1 N=2 N=3 N=4 N=6 N=20 N= ∝
Meaning One Blink Two Blinks Three Blinks Four Blinks Six Blinks Twenty Blinks Continuous
Blinks

e.g. ( 3 ) means three Red blinks.

( ∝ ) LED blinks yellow and green alternatively.

( N ) N= ∝ Meaning Continuous Solid on

e.g. ( ∝ ) means Continuous Blu e Solid on. Configure the system us in g A2 Assistant software

.

Basic flying test FailSafe and Low

- voltage settings A dvanced functions: I OC, Gimbal, Gear M ount the A2 flight control system on your aircraft finish connection.©201 3

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# 1 Assembly and C onfiguration

F or hardware installation, software configuration and compass calibration please adhere to the following
sections.


## 1.1 Hardware Installation and Connection
(1) P lease adhere to “ 1.1.1 Mixe r Type Supported ” to choose a mixer type and assemble your aircraft. (2) P lease adhere to both “ 1.1.2 Hardware Connection Diagram ” and “ 1.1.3 Important for Assembly and Connection ” to install and connect all units on your aircraft.



### 1.1.1 Mix er Type Supported
F ollowing Mixe r Type s are supported.

The direction of the arrow in diagram indicates the rotation di rection of the motor/propeller. For coaxial propellers: Blue propeller is at TOP ; Red propeller is at Bottom . Otherwise all propellers

are at to p.©201 3

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### 1 .1.2 Hardware Connection Diagram

1.1.3 Important for Assembly and Connection This section describes all device port function s , assembly requirement s , connection requirements and tips during usage. Also the linking proce dures between the built

- in Receiver DR16 and your Transmitter. Please read all information below carefully, especially if you are a first time user. 

### (1) Controller Unit
The Control ler Unit is the core component of the A2 flight control system: (1) M1~M8 are used to connect to the ESCs of the aircraft. (2) The built

- in Receiver DR16 is based on DJI DESST technology, which can be used with the Futaba FASST series and DJI DESST series Transmitter. (3) CAN1 and CAN2 ports are working independent ly and should connect to diffe rent modules. (4) 4 independent and c onfigurable outputs. (5) I t is compatible with the external Receiver, e.g. DSM2 satellite Receiver. (6) Use the optional DJI DBUS Adapter to support the traditional receiver. 

### Port Description©201 3

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### Mount ing Requirement s : Install the C ontroller U nit in the proper position to make sure the ports are accessible. No specified direction is required. Place the antennas in an open space under th e aircraft, DO NOT block them. Position the heads of

two antennas at a 90

- degree angle. DO NOT bend or wind them.


### Receiver System
The A2 flight control system can use its own built

- in Receiver, and also can support external receiver s . Whatever type of Receiver is used, please make sure that the Receiver and Transmitter is linked correctly before use. 

### A. B uilt

- in Receiver
For e nhanc ing the system integration and reliability , the A2 is integrated with a 2.4G receiver based on frequency hopping technology. The built

- in Receiver can be used with the Transmitter of Futaba FASST s eries or DJI DESST series after linking. F or users, you are only asked to carry out the link procedures, no extra requirement for connection

. Please carry out the following procedures to finish the Link process , and the configuration in the A2 Assistant

so ftware

- >Basic

- >R/C

- >Receiver Type

. Select the DR16 option. During use, you may see the following LED indication, please do the operation according to the table below. LED Description Operation ( ∝ ) Signal from T ransmitter has been detected by the R eceiver, but not matched. Link operation required
( ∝ ) No T ransmitter signal is received, e.g. the flight control system is power ed on but the Transmitter is power ed off. Switch on
( ∝ ) The R eceiver an d T ransmitter have been link ed to each other successfully

. C an work normally©201 3

- 2014 DJI. All Rights Reserved. 9

T he DR16 Receiver is compatible with the Futaba transmitters which have optional FASS MODE MULT, MLT2 or 7CH. U sers can find out more available Fu taba transmitters and configuration requirements
refer to the FAQ

- >The Transmitter setup of FUTABA

.



### B. DSM2 S atellite R eceivers
If us ing DSM2 satellite R eceiver s , please follow the diagram for connection, set the R eceiver referring to your R eceiver m anual, and select the Receiver type as DSM2 in the A ssistant software

- >Basic

- >R/C

- > Receiver Type

.

Notes for the DSM2 users :  T here is n o need to enable the Fail S afe function in the Transmitter

. I f the Receiver loses the sig n al from the Transmitter, the controller unit will enter into FailSafe automatically, and the aircraft will©201 3

- 2014 DJI. All Rights Reserved. 10 hover or Go

- home as configur e in the FailSafe in the Assistant software.
 When using the dual

- mode Transmitter, please set the transmiting mode as DS M2 in SYSTEM SET UP

- >FRAME RATE

- >MODE, which should not be DSMX.
 Support DSM2 satellite Receivers used with all S PEKTRUM Transmitters, e.g. DX6I DX7S DX8 DX18 etc., as well as JR Transmitter s , e.g. DXS9II DXS11

. 

### C. S

- BUS Receivers
If us ing S

- BUS R eceive r s please follow the diagram for connection, set the R eceiver referring to your R eceiver manual, and select the Receiver type as D

- BUS in the A ssistant software

- >Basic

- >R/C

- > Receiver Type

.

Notes for the S

- BUS users :  It is n o need to enable the FailSafe function in the Transmitter

. O nce the Receiver loses the signals from the Transmitter, the controller unit will enter into FailSafe automatically, and the aircraft will hover or Go

- home as configurations of the FailSafe in th e Assistant software. 

### D. PPM Receivers
If us ing PPM R eceiver s please follow the diagram for connection, set the R eceiver referring to your R eceiver manual, and select the Receiver type as PPM in the A ssistant software

- >Basic

- >R/C

- > Receiver Type

.©201 3

- 2014 DJI. All Rights Reserved. 11 

### E. Traditional Receivers
If us ing Traditional R eceiver s , the DJI D

- BUS Adapter is required. Please follow the diagram for connection, set
the R eceiver referring to your R eceiver manual, and select the Receiver type as D

- BUS in the A ssistant software

- >Basic

- >R/C

- > Receiver Type

.

N otes for the traditional receiver users:
 W hen using the traditional receiver which doesn ’ t have endpoint adjustment operations to set FailSafe in the U channel , the Go

- H ome switch is recommended and users can use it to trigger
the FailSafe

.  C onfigure the FailSafe function of your transmitter and receiver according to its instructions,
set the FailSafe position of the Go

- Home switch in the position triggering the FailSafe function

. I f it is configured correctly as mentioned above , the FailSafe function will be activated automatically if the receiver loses the signal from the transmitter.
 U sers can get more information about the FailSafe function referring to 3.1 FailSafe in this
manual and the help text in the Assistant software.©201 3

- 2014 DJI. All Rights Reserved. 12 

### (2) IMU ( Inertial Measurement Unit ) :
Built

- in inertial sensor s , for the measurement of aircraft attitude ; built

- in p ressure sensor for the detection of
aircraft altitude. Should be connected to the CAN1 port of the Control ler Unit, and be mount ed according to the required location and orientation

. The IMU has been calibrated before delivery , it should be used under the specified temperature ; otherwise the temperat ure may have an effect on the IMU performance. Working environment temperature : - 5 o C ~60 o C Storage environment temperature : <60 o C O rientatio n Requirement s : P lease mount the IMU as one of the following options. C onfigure in the A2 Assistant software

- >Basi c - >Mount

- > IMU , and select the matched option.

Loc atio n Requirement s :

(1) The top side should be facing up. DO NOT mount upside

- down. (2) DO NOT cover the ventil ation holes, keep them unblocked and clean. (3) Take heat preservation measures if working in cold weather. (1) Mount the IMU at a low vibrat ion position and the sides of the IMU should be precisely parallel
to the aircraft body. B ased on our experience , there is less vibrat ion near the aircraft’s center of gravity

. (2) NOT water

- proof or oil

- proof. (3) Check the double faced adhesive tape regularly to make sure that the IMU is fixed firmly.
There is a CAN

- Bus connector , which can be used to connect to the GPS

- COMPASS PRO PLUS or other DJI product

.©201 3

- 2014 DJI. All Rights Reserved. 13 

### (3) G PS

- COMPASS PRO PLUS
GPS

- COMPASS PRO PLUS module has a b uilt

- in GPS and compass. The compass is used for geomagnetic field

measurement . It should be mount ed according to the required location and orientation

. Compass calibration is required before use

. DO NOT use and store the compass i n the ferromagnetic material environment

.



### Mount ing Procedure : a) Use the epoxy resin AB glue to assemble the GPS bracket first. The longest one is recommended.

b) Mount the bracket on the aircraft first, and then fix the GPS

- COMPASS PRO PLUS o n the plate of the bracket ( using the 3M sticky pads provided ). 

### Mounting Position :

Usage Requirements (1) The DJI logo should be fac ing the sky, with the orientation arro w pointing directly to the nose
direction ; otherwise it may lead to take off failure

. (2) Fly the aircraft in an open space without buildings or trees; otherwise it may have an effect on the GPS.

(3) The c ompass is sensitive to magnetic interference, should be f a r away from electronic devices , otherwise it may lead to abnormal flying

. (4) Please always keep the compass module away from magnet fields

. Otherwise it may damage the compass module and lead the aircraft to work abnormally or even be out of control.©201 3

- 2014 DJI. All Rights Reserved. 14 

### (4) PMU ( Power Management Unit)
T he PMU provides dual BEC s ( Battery Eliminator Circuit ) : (1) PW port outputs power for the whole Flight Control System with current no more than 2A

. (2) PX port outputs power (3A@5V) and V

- SEV signal using the low voltage protection functio n. I n addition , there are two CAN

- Bus port s for LED

- BT

- I con nection and other DJI product s (e.g. DJI 2.4G Data Link). 

### Port Description

Mount ing Requirements: C hoose a ventil ated pla ce to mount the PMU for cooling , no mountin g orientation requirement.


### (5) LED

- BT

- I
T he LED

- BT

- I has integrate d LED Indicator, Bluetooth and USB port: (1) The LED is mainly for f light control system status indicat ion during flying (e.g. Control Mode). (2) Bluetooth is used for real

- time communication with your mobile device (e.g. iPhone), to realize parameter configuration on a mobile device. F or parameter configuration using a mobile device, it is requir ed to install the DJI Assistant App on the mobile device. When you mount the LED

- BT

- I, please make sure the
side with ANT LOGO is unsheltered after mount ing. (3) In addition, there is a Micro

- USB port, make sure it is mounted for convenient connection. 

### Port Description :

Mount ing Requirement s: Mount in a good place to make sure the LED is visible during flying. Antenna of Bluetooth s hould be unobstruct ed

.©201 3

- 2014 DJI. All Rights Reserved. 15 

## 1.2 Software Installation and Configuration
Please configure the A2 flight control system in the Assistant Software according to the following instructions. Users are required to conf igure every item within the “Basic” page when use the A2 flight control system for the
first time. 

### 1.2.1 Installing Driver and Assistant Software Installing and running on Windows
1. Download driver installer and Assistant Software installer in EXE format from t he download page of A2 on the DJI website. 2. Connect the A2 flight control system to a PC via a Micro

- USB cable. The Micro

- USB port of the A2 flight control system is on the LED

- BT

- I module. 3. Run the driver installer and follow the prompts to finish in stallation. 4. Next, run the assistant software installer and follow the prompts to finish installation. 5. Double click the A2 icon on your Windows desktop to launch the software.

The i nstaller in EXE format only supports Windows operating systems (Win XP, Win7, Win8 (32 or 64 bit)).


### Install ing and run ning on Mac OS X
1. Download the A ssistant S oftware installer in DMG format from the download page of A2 on the DJI
website. 2. Run the installer and follow the prompts to finish installation.

3. When launching for the first time if use Launchpad to run the A2 Assistant software, Launchpad will not allow access because the software has not been reviewed by Mac App Store.

4. L ocate the A2 icon in the Finder, p ress the Control key and then click the A2 icon (or right

- click the A2 icon using a mouse). Choose Open from the shortcut menu, click O pen in the prompt dialog box and
the n the software will launch

. 5. After the first successful launch, direct launching of the software can be achiev ed by double

- clicking the A2 icon in the Finder or using Launchpad.©201 3

- 2014 DJI. All Rights Reserved. 16

Installer in DMG format supports only Mac OS X 10. 9 or above. Usage of A2 Assistant software on Mac OS X and Windows are exactly the same. The Assistant software pages appear in other places of this manual are on the Windows for example. 

### 1.2.2 Configur e using Assistant Software on a PC A 2 flight control system can takes power via t he USB port during c o nfiguration, no additional battery is required. N ote that the USB port can supply power no more than 500mA, an ad ditional battery is necessary if connection failure or intermittent working

. R un the assistant software, and follow the buil t

- in guide to carry out the configuration. Note that you may be asked to register for first time use.



### 1. View 2. Restore &Upgrade 3.Set 4.Check
Click “Info” to view
user information
and software
version etc. Enter “Tools” to restore default settings. And check whether the
firmware is the latest. Enter “ Basic” page

. Set the Aircraft , Mounting , RC , Gain”
in each tab. Enter “View” page to check all
basic settings.©201 3

- 2014 DJI. All Rights Reserved. 17

“ RC STATUS ” description Normal : the transmitter and receiver are linked and communicating well.

Disconnect : t he A2 Flight Control System is power ed o n, but the transmitter is power ed off

. RC

- LOST : RC signal is lost ( e.g. the transmitter is turned off after power on ) or the receiver
is send ing F/S signals ( e.g. the aircraft flies out of the range which transmitter is
controllable ).

The firmware version and the Assistant Softwa re version should be match ed when using the software to configure the A2 flight control system, otherwise the software will not work. I t ’ s recommended to keep the firmware version and Assistant Software version up to date to avoid this issues

.



### 1.2.3 Conf igure the control mode switch Users should configure the control mode switch in the Assistant software in the following page. Only the control mode switch has been set correctly, the control mode displayed in the left bottom corner will be the same to the control mode pointed by the cursor o n the channel U.

C onfiguration steps Ex amble s S tep 1. Power on your Transmitter, map a 3

- position switch on the transmitter to the U channel of Controller Unit as the control mode switch, of which two positions are de fault as Atti. Mode

a nd GPS Atti. Mode and the third position is optional, users can set as Atti. Mode or Manual Mode.©201 3

- 2014 DJI. All Rights Reserved. 18

S tep 2. Toggle the control mode switch to its three positions, accordingly the cursor will move to
some control mode.

S tep 3. Power off the Transmitter , the FailSafe will be enabled and the cursor will point to any area
out of the control mode s .

S tep 4. If all steps above are realized, that indicates the
control mode switch is set successfully

. Important I n step 2, if the cursor doesn ’ t point to the correct control mode area (e.g. the following figures ) , that indicates abnormal control mode switch configuration. U sers must re - configure the Endpoint and FailSafe functions in the Transmitter to make the cursor point to the ri ght control mode and the according area s become blue.©201 3

- 2014 DJI. All Rights Reserved. 19 

### 1.2.4 Configuration Checking

*Fig. above for reference only, please adhere to actual GUI. Check List Description 1 Check the IMU orientation direction

. 2 Check the Mixer Type of aircraft.

Make sure the motors are rotating normally , and p ropeller installation is in correct direction. 3 The Receiver type is correct

. 4 、 5 Check the basic and attitude gains

. 6 Move the sticks to test whether the cursors moves following the sticks. T oggle the “ U ” switch to

test the control mode setting.
7 ~ 

# ○ 11 A dvanced configuration, users can configure it according to their requirements after reading the
manual.


# ○ 12 Check the Channel Map between the T ransmitter and A2 flight control system

.

1 2

3

4 5

6 7

8

9

10

11

1 2©201 3

- 2014 DJI. All Rights Reserved. 20 

### 1.2.5 Tools

1 Config E xport or import the tuning parameters and resto re the default setting and reset the BTU module. 2 Sensors Read gyroscope, acceleration and compass sensor value. 3 IMU Calibration Calibrate IMU base d on the gyroscope and accelerati on sensor reading s from Assistant. C alibrate is needed , when:
 Gyroscope Mo d value exceeds 1.5.
 Acceleration Mod value below 0.98 or exceeds 1.02. Steps to follow when calibrating IMU: 1. Go to IMU Calibration section after power ing on A2, wait until A2 enters “ Ready ” status

. 2. Click “ Calibration ”, take note of the following warning message:

Place the IMU on a stationary and horizontal surface and ensure A2 logo faces upward. 3. Click “ OK ” to proceed.

1

2

3 4©201 3

- 2014 DJI. All Rights Reserved. 21 4 Device Information and Connection Status A ll devices that connected to the A2 f light controller are highlighted, however, disconnecte d devices appear grey. Single click a highlighted device to upgrade its firmware. You can also upgrade all firmware by clicking the

“ Upgrade All ” button.©201 3

- 2014 DJI. All Rights Reserved. 22 

## 1.3 Compass Calibration
The Compass can assistant the GPS to position the aircraft, which is very i mportant during flight. As we know, the compass is very sensitive to electromagnetic interference , which will cause abnormal compass data, and lead
to poor flight performance or even flight failure

. Compass Calibration MUST be done for first time use. It i s recommended to calibrate the compass outdoor s after the C ontroller U nit finds 7 or more GPS satellites

. Regular calibration enables the compass to keep optimal performance

. 

### Calibration Caution s (1) DO NOT calibrate your compass where there is strong magne tic interference, such as magnetite, car park, and steel reinforcement under the ground. (2) DO NOT carry ferromagnetic materials with you during calibration, such as keys or cell phones. (3) Compass Calibration is very important; otherwise the flight control syst em cannot work. 

## Calibration Procedures Choose an open space to carry out the following procedures.



### S ituations that require recalibration S ituations Descriptions Compass D ata abnormal LED blinks yellow and green alternative ly ( ( ∝ ) )

. F lying field altered Flying field has changed over a long distance

.

M echanical alteration T he mount ing position of GPS

- COMPASS PRO PLUS module changes. E lectronic units such as C ontroller U nit , CAN

- HUB, battery etc. have been added,
removed , remou nted or other alterations. Mechanical structures of the aircraft has changed D rifting during fly ing E vident drifts occurred in flight such as the aircraft doesn ’ t fly straight A ttitude errors LED often blinks error indicator when the aircraft turns a round.©201 3

- 2014 DJI. All Rights Reserved. 23 

# 2 Basic flying
Read this section before basic flight testing

.


## 2.1 Control Mode Instruction The aircraft performs differently wh en using different control modes. Please read the following table to know
the different control modes, which may help you to achieve a more involved flight experience.

Control Mode GPS ATTI. Mode ATTI. Mode Manual Mode
Command Linearity YES

Yaw Control the aircraft to rotate in clockwise and counter clockwise direction. Maximum rudder angular velocity 150°/s

Rol l and Pitch Aircraft attitude control; Mid point of s tick is for 0 ̊ attitude,
and its endpoint is 35 ̊. Max

- angular velocity is 150°/s. No attitude angle limit

.
Throttle Aircraft height control

. Maintain the altitude best above 1

meter from ground when the throttle stick is in mid position

. No altitude locking when the throttle stick is in mid position. All Sticks Released Lock position if GPS signal is adequate. Only attitude stabilizing. No position l ock ing. Keep original attitude

.

GPS Lost Once GPS signal lost the flight

control syst em will enter ATTI

. Mode aut omatic ally

. R eturn to GPS ATT1. Mode after GPS signal has recovered for 2 seconds. --- ---

IOC Supported CL/HL/POI / BTM CL None Assign a 3

- position switch of the transmitter as the control mode switch

. The position

- 1 is defaulted as “ GPS ATTI. Mode ” and the position

- 2 is “ ATTI. Mode ”

. T he position

- 3 can be set as “ Manual Mode ” or “ ATTI. Mode ” in A2 assistant software.

C ontrol M ode S witch position

- 1 position

- 2 position

- 3 Configur able C ontrol M ode GPS ATTI. Mode ATTI

. Mode * ATTI

. Mode * Manual Mo de

FailSafe Protection The flight control system will enter FailSafe

Mode if the Transmitter signal is lost and no matter if Transmitter signal recovers or not, system will not exit FailSafe mode automatically. The flight control system will enter FailSaf e Mode if the Transmitter signal is lost and the system will exit FailSafe once

the signal recovers.©201 3

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GPS I nvolved YES NO Low

- voltage Protection LED alert with D e s cending or Go Home & Landing precautions Only LED alert

E nvironment recommended Open flyin g field;

Good GPS signal Narrow Space; GPS signal bad R egain control in emergency

The difference between ATTI . Mode of position

- 2 and ATTI . Mode of position

- 3 is that they are working differently in p rotection situations.©201 3

- 2014 DJI. All Rights Reserved. 25 

## 2. 2 Flying E nvironment R equir emen t s (1) Before use of the product, please accept some flight training (Using a simulator to practice flying, getting instruction from a professional person, etc.). (2) D O NOT fly in bad weather, such as rain or wind (more than moderate breeze) or fog. (3) The fl ying field should be open without tall buildings or other obstacles; the buildings of steel structure will interfere with the compass. (4) Keep the aircraft away from obstacles, crowds, power lines, trees, lakes and rivers etc. (5) Try to avoid interference betwee n the remote control T ransmitter and other wireless equipment. (No base station or cell tower around) (6) The flight control system can’t work at the South Pole and the North Pole. (7) All parts must be kept out of the reach of children to avoid CHOKE HAZARD; if a child accidentally swallows any part you should immediately seek medical assistance.


## 2. 3 Check List before Flying
Double check the following list, otherwise, if any one of the following item s is wrong it may lead to flight accident

.

(1) A ll parts are in good condition , no ageing or damaged components (2) Motor rotating direction (3) Propeller mounting direction (4) Mixer Type set in assistant software (5) IMU and GPS

- COMPASS PRO PLUS mounting direction (6) T ransmitter channel mapping and sticks move ment direction correct (7) Compass calibration (8) ESC connection (9) IMU and GPS

- COMPASS PRO PLUS firmly mounted
In addition , check the following items to make sure the system can work.

(1) The Transmitter battery is fully charged. (2) The aircraft battery is fully charged. (3) Do not over load the aircraft.©201 3

- 2014 DJI. All Rights Reserved. 26 

## 2. 4 Power on and C heck
(1) Control mode LED indicator Power on the Transmitter then the flight control system

. Toggle the control mode switch to different positions. Control M ode LED indicator Control Mode Switch GPS ATTI. Mode ATTI . Mode Man ual Mode
LED (Stick not in midpoint (2) ) (Stick not in midpoint (2) ) No LED indicator

Set Put the Control Mode switch to GPS position for basic flying test.

Note: when the GPS signal LED indicator is bad or worst ( (2) or (3) ) and last s for more th an 3secs, the flight control system will enter into ATTI

. Mode.

(2) GPS signal LED indicator GPS signal indicat ion blinks after every Control mode indicat ion

. We s uggest flying when GPS satellites are more than 5. GPS signal LED indicator
Worst ( < 5 ) : (3) Bad ( = 5 ) : (2) Well ( = 6 ) : (1) Best ( > 6 ) : No indicator


## 2. 5 Start M o tors Metho d s CSC (Combination sticks commands) is used to start motors instead of just pushing the throttle stick. O ne of the following methods can be used to start/stop motors.

Under the conditions stated below, the motors will stop in ATTI

. Mode /GPS ATTI. M ode : (1) The throttle sticks is under 10% for more than 3secs after motors start. (2) The t hrottle sticks is under 10% for more than 3secs after landing. (3) The throttle sticks is under 10% for more than 3secs and the inclined angle of aircraft exceeds 70° 。
I f motors fail to start, please refer to the following list for trouble shooting. (1) T he Controller Unit fails to obtain the firmware version of IMU and GPS, please check the connection or up grade the IMU and GPS.©201 3

- 2014 DJI. All Rights Reserved. 27

(2) T he firmware version of IMU and Controller Unit is mismatched; please upgrade the firmware of IMU or Controller Unit. (3) T he firmware version of GPS and Controller Unit is mismatched; please upgrade the firmware of GPS or Controller Un it. (4) The transmitter calibration has exited abnormally, please recalibrate. (5) T he transmitter calibration results with big bias, please recalibrate. (6) T he transmitter calibration results with big mid point bias, please recalibrate. (7) Incorrect channel mappings , please make sure the basic channels A/E/T/R/U are mapped correctly

. (8) I nvalid SN or SN error; please contact your dealer or DJI custom service. (9) T he Controller Unit is locked, please unlock the Controller Unit and reconfigure all the parameters in the Assista nt software. (10) IMU disconnected, please check the connection. (11) C ompass data abnormal, please eliminate magnetic interference and recalibrate the compass. (12) W hen F light limit function is enabled, if the aircraft fly out of the max

- radius in ATTI. mode and the

m otors are stalling, the motors will fail to spool up in GPS ATTI. mode cause the Flight limit
function works. (13) T he attitude status is bad and the LED indicator blinks white, the motors will fail to spool up. (14) T he Transmitter disconnected, the motors will fa il to spool up. (15) The A2 flight control system is connecting and communicating with the Assistant software, the motors will fail to spool up.©201 3

- 2014 DJI. All Rights Reserved. 28 

## 2. 6 Basic Flying T est Carry out the following procedures to complete the basic flight test. 

### 1. Wait the GPS s ignal to be well LED
Pl ace the aircraft away from you and others at least 3 met ers and wait the ≥6 ( about 30 seconds)

. or no Red LED



### 2

. Start motors and takeoff aircraft

. LED Execute CSC to start motors; all sticks back to midpoint as soon as motors start, then push
the throttle stick to take off the aircraft, meanwhile the home point is record ed

. NOTE:
3 6 secs after power on; 10secs after ≥ 6; Motors have been started, auto

- record the position as home point at the first time the throttle stick is raised 

### ( ∝ 

### )

After the home point is recorded successfully and the distance from aircraft is less than 8m, LED indicator will blink 6 violet conti nually. Note : only when GPS signal is good (no Red LED) LED indicator will blink 6 violet continually

. 

### ( 6 

### )

3. Operate sticks to control the flying attitude of the aircraft during fl ight Transmitter (Mode2) Aircraft Operations

Throttle Stick Push Throttle sticks to control the aircraft to elevate and descend. The aircraft can lock to an altitude when the throttle stick is at midpoint.

Yaw Stick Push the yaw stick to rotate the aircraft in clockwise or counter clockwise direction.

Roll Stick Push roll stick to control the aircraft left or right , pitch stick to control forward or backward. When both roll and pitch sticks are at midpoint : (1) GPS ATTI. M ode : the aircraft will be stabilized and locked in horizontal position. (2) ATTI

. M ode : the aircr aft will be stabilized but unlocked in horizontal position. Pitch Stick©201 3

- 2014 DJI. All Rights Reserved. 29 

### 4.Hover
In GPS ATTI. M ode , the aircraft will hover when the throttle/yaw/roll/pitch sticks are all released at mid

- point.



### 5.Landing
Use the throttle stick to control the landing speed, try to land your aircraft gently to avoid shock or crash.

Please refer to the next section “ P rotection F unctions S etting” to take precautions. (1) Low voltage alert: yellow quick flashes or red quick flashes

. (2) FailSafe : LED indicator blinks blue

. Moreover , you may come across the following abnormal situation, please carry out the operation below. (3) Compass data is abnormal; the LED blinks yellow and green alternatively. P lease re

- calibrate the Compass. (4) IMU data is abnormal, the LED blinks fo ur green. P lease contact your dealer.©201 3

- 2014 DJI. All Rights Reserved. 30 

# 3 Protection Functions Setting
Set protect ion in the Assistant software

- > Advanced page . FailSafe and Low voltage protections are required

.


## 3.1 FailSafe

FailSafe works when the Transmitter ( TX) signal is lost, the flight control system will auto matically control the
aircraft to reduce injuries or damage

.

TX signal D escriptions

Home Point (HP)

≥

6 Home poin t will be recorded:

- After 30 seconds of strong GPS signal

- 10 seconds later after green LEDs have stopped blinking, when throttle sticks are moved away from mid point.

FailSafe Customize the failsafe to define what happens if remote control signal is lost. Choose
from either a uto hovering, RTH or "RTH at a preset altitude in the A2 Assi s tant"

One

- Key Go Home A switch can be set to trigger RTH without signal loss. If One

- Key RTH is enabled
duri ng flight, aircraft control will cease and LED lights will indicate Control Mode. Release the RTH switch to regain control. If the Failsafe has been triggered the
switch will not work. With One

- Key RTH in progress, aircraft orientation can be controlled wh ile the
aircraft returns.



### FailSafe and Go H ome procedures

(1) The aircraft will not go home (only attitude stabilizing) i n the condition that <6 o r GPS is not working , even if Transmitter signal is lost or Go Home switch is triggered. (2) It is reco mmended to set the Go Home switch in the Assistant software. U sers are suggested to©201 3

- 2014 DJI. All Rights Reserved. 31 enter FailSafe and go home by using the Go Home switch rather than turning off the Transmitter in emergency situations. (3) M ake sure there are no obstacles during aircraft go home and users are familiar with the methods to regain control.



### H ow to regain con trol in FailSafe
3

- position Switch Position

- 1 Position

- 2 Position

- 3

GPS ATTI. Mode ATTI
. Mode ATTI
. Mode Manual Mode

R egain control You have to t oggle the control mode switch

once to regain control if the signal recovers

. R egain control as soon as signal recovers

.



## 3.2 Low V oltage P rotection Low voltage protection is used to alert low battery voltage during flight; in this case, users should promptly fly back the aircraft and land to avoid unexpected damages. T o use this function please set in As sistant software

- > Advanced

- > Voltage page to configure two voltage level s .
P rotection s O ption Selected C onditions LED A ircraft

F irst level LED

---- ( ∝ ) N one

GH & Landing Make sure the home point is recorded and

no obstacles in going home and landing path

. ( ∝ ) Go

- Home & Landing

S econd
level LED

---- ( ∝ ) N one

D escending

---- ( ∝ ) D escending directly



### Go

- Home & Landing Usage Tips (1) The h ome point recorded is the same in both FailSafe and Low voltage protection. The aircraft will not go home in the follow ing cases : a) Control mode switch is at the position

- 3 (M anual Mode or ATTI . Mode ) b) GPS signal is bad ( < 6 ) c) The distance between aircraft and the home point is less than 25m, and the height over the Home point less than 20m. 

### D escending Usage Tips
The aircraft will not hover when the throttle stick is at the mid point. Push the throttle sti ck to 90% of its endpoint, the aircraft will still ascend slowly if you continue to pull the throttle stick, and the control of Pitch, Roll and Yaw are the same as before.©201 3

- 2014 DJI. All Rights Reserved. 32

(1) Please pay atten tion to the LED alert of low voltage and make sure the power is enough for go home and landing. I nsufficient power reserve will cause the aircraft to crash as well as other
consequences. (2) I f the second level low voltage alert occurs in below procedures, the aircraft will descend automatically. a) W hen the aircraft is in Fa ilSafe and Go Home process 。 b) W hen the aircraft is controlled by the Ground Station.©201 3

- 2014 DJI. All Rights Reserved. 33 

# 4 Advanced Features
The advanced features of A2 include IOC (intelligent orientation control), gimbal control, parachute activation and so on. It also enable users to tweak the A2 configuration via the A2 Assistant wirelessly through the Bluetooth connection. 

## 4.1 IOC (Intelligent Orientation Control) function 4.1.1IOC IOC Help users to set the Flying direction ; Should be enabled in Assistant software.

F lying dir ection T he flying direction of aircraft when pushing the Roll and Pitch sticks. F orward direction T he flying direction of aircraft when the pitch stick is pushed forward.

N ormal flying IOC is disabled. Forward direction is pointing to the nose directi on and changes

along with the nose. CL(course lock)
mode Its forward direction is pointing to the nose direction when recording, which is

fixed until you re

- record it or exit from CL.

HL (home lock) mode Record a Home Point (HP), push Pitch stick to co ntrol the aircraft far from or near to the HP.

POI mode Point of Interest . Record a p oint of i nterest ( POI ), the aircraft can circle around

the POI, and the nose always points to the POI. BTM (Banked Turn)
mode In this mode, the roll and yaw sticks ar e combined to help you perform banked

turns with only one hand.



### Conditions of IOC function

F lying IOC

Setting C ontrol M ode GPS

- COMPASS PRO PLUS R equired GPS Satellites D istance L imits

Normal

---- ---- ---- B asic to control mode N one CL Enabled N ot Manual Mode Compass N one N one HL Enabled GPS ATTI. Mode GPS ≥ 6
POI Enabled GPS ATTI. Mode GPS ≥ 6
BTM Enabled GPS ATTI. Mode GPS ≥ 6 N one


### Step 1 IOC switch set ting P lease enable the IOC function in Adva nced

- > IOC page of Assistant software. T hen choose a 3

- positon switch on the Transmitter to set as IOC switch, which is used to select the different IOC modes and manually record the©201 3

- 2014 DJI. All Rights Reserved. 34 Forward direction , HP and POI recording

. There are six types of IOC switch setting. B elow are the three recommended options of IOC switch setting which may be configured in the Assistant software. Switch positions A B C
1 OFF OFF OFF
2 CL CL CL
3 HL POI BTM



### Step 

## 2 Forward D irection , HP and POI R ecording After you enab le the IOC in assistant software, the flight control system will record the forward direction and home point automatically after power on , if the record ing condition s are met

. Y ou can manually re - record the forward direction, home point and POI during flyi ng. Note that no BTM recording is required. Read the following table for
the record ing method details. CL HL POI
Recorded Orientation Aircraft’s nose as forward
direction Home point The position that the user wish to fly around.

C onditions 3 6 secs after power on 1 0 secs later after ≥ 6 ; M otors have been started

. 1 0 secs later after ≥ 6

.

Auto matically A uto matically record at 3 6

secs after power on A utomatically record at the first
time you push the thrott le stick N o A utomatic record method

Manual A ccording to any option of IOC switch setting, quickly toggle the switch between adjacent

positions 3

- 5 times to record manually

.

Successful (20) ( 20 ) ( 20 )
(1) DO NOT toggle the switch between the position 1 and 3 frequently , which may re - recor d the
p osit i on 2. (2) T he new Home Point and Forward Direction can be set only after one has already been recorded automatically. (3) HP is not only used in IOC, but also in FailSafe and Low voltage as go home and landing
destination

. T he flight control system will automatically record the HP even if IOC function is
dis abled in Assistant software but Forward direction and POI can be recorded only after IOC is
enabled.©201 3

- 2014 DJI. All Rights Reserved. 35

(4) O nce the Home Point is recorded successfully, LED will blink (6) continually under the following co nditions. All conditions must be true.
1. ≥ 6

. 2. Distance bet ween aircraft and the recorded home point is less than 8m. 3. Current control mode is in GPS ATTI. Mode or ATTI

. Mode of switch position

- 2

.



### S tep 

## 3 CL, HL and POI flying test P lease study the following diagram then make an I OC flying test. IOC LED indicator b links ( (2) means not all
stick ( s ) at the midpoint )

HP POI F lying direction F orward direction R out e Auxiliary line

F lying IOC

switch R ecord P itch stick control of aircraft R oll stick control of aircraft

N ormal OFF None

CL CL

HL HL

POI POI

DO NOT toggle the IOC switch frequently in HL flying to avoid re

- recording the HP unwittingly.

IOC function is available only when all the required conditions are satisfied. I f any condition is omitted
the flight control system will exit IOC. P lease keep an eye on the LED to know the current control mode

. (1) I t is r ecommended to start the HL flight when the aircraft is > 10m away from the HP. If start ing
the HL when the distance between aircraft and HP is less than 10m and it ’ s the first time you
st art HL after power on, then the flight control system will only enter HL after flying out of the©201 3

- 2014 DJI. All Rights Reserved. 36 10m range. (2) D uring HL flying if one of the following condition s occur , the flight control system will exit HL and enter into CL: the aircraft is within of 10m f rom HP; the control mode is changed to ATTI . Mode ; <6( LED 

### ( 2 

### ) or 

### ( 3 

### ) )

. 

### Step 4 Banked Turn m o de fl ying test Banked Turn Mode is useful when you want to perform banked turns one handed. It allows you to pitch and roll to turn without using the yaw stick. Application examples: 1. Normal and FPV aerial photography in this mode is smooth and simple, giving a different visual feel to your
work. 2. In this mode, the roll and yaw sticks are combined to help you perform banked turns with only one hand.

Setting steps (Mode 2) : 1. To enable Banked Turn Mode , replace the POI gear of the IOC switch with Banked Turn gear. 2. With Banked Turn Mode activated, you can circle the aircraft with just one stick. To do this, Mode 2 (throttle on the left stick) user s should select the “Use Roll” option while Mode 1 (throttle on the right stick) users
should select the “Use Yaw” option

.©201 3

- 2014 DJI. All Rights Reserved. 37 U sin g Banked Turn Mode (Mode 2): 1. Select “ Use Roll ” to disable the yaw stick or select “ Use Yaw ” to disable the roll stick. 2. Push pitch stick to move the aircraft for ward or backward

. 3. After that, Push roll stick left or right to perform banked turn a s the following diagram shown. N o yaw stick required. 4. When the aircraft is hovering, yaw is controlled by the roll stick instead. 5. Rapidly pull the pitch stick to the mid

- point to stop the aircraft.

F lying IOC
switch R ecord P itch stick Roll stick P itch stick Roll stick P itch stick Roll stick P itch stick Roll stick

BTM BTM No ne

(1) Banked Turn Mode works only with GPS

- ATTI mode (GPS ≥6 ). The aircraft will stop and hover when less than 6 satellites are found. (2) Onc e the aircraft performs side slip, adjust the drift damping value. Note that too big value may lead
to aircraft vibration.



### 4.1. 2 Cruise Control Cruise C ontrol allows you to lo ck the speed of the aircraft , freeing you to control the gimbal while maintai ning flight. Application examples: 1. By maintaining steady flight, you can focus more on your shots and gimbal control, and your total flight time is increased by eliminating unnecessary speed changes. 2. Activate Cruise Control to lock your aircraft into its current horizontal speed when you release the control
sticks.

Cruise Control only works when IOC has been enabled. Tick the Cruis e Control box in the A2 Assistant to enable it.©201 3

- 2014 DJI. All Rights Reserved. 38 Assign a 3

- gear switch on the remote control for Cruise Control . Follow the steps below to use Cruise Control

. Use the control sticks to accelerate the aircraft to your target speed then toggle the assigned Cruise Control switch to “ S et ” or “ Continue s ”. The action of three different gears of the cruise speed is defined as follow : 

###  Close
Deactivate Cruise Control

. 

###  Set Move the switch to this position in flight to “ S et ” the cruising speed. The speed at the point that the switch is toggled will be maintained. If you use the control sticks to adjust aircraft speed, the aircraft will return to its original speed once the control sticks return to center. 

###  Continue s In this position the aircraft will maintain its speed of flight however if you accelerate or slow down, it will continue flying at the new speed once the control sticks retur n to center.

(1) Cruise Control only works in GPS

- ATTI mode ( GPS > 6 )

. (2) The aircraft will exit Cruise Control mode and hover at its current altitude when less than 6 GPS
satellites are detected , switches to ATTI. m ode or enters auto go home mode

. To enter “Set ” and

“ Continue ” modes, you must first go into “ OFF ” mode. (3) Cruise Control is disabled during Banked Turn mode flying. (4) M aximum speed is 15m/s under Cruise Control mode.©201 3

- 2014 DJI. All Rights Reserved. 39 

## 4.2 Servo Gimbal function

C onnect the servos of your gimbal to the Controller Unit as the fig. below , roll servo connect s to F3 port and pitch servo connect s to F 2 , and configure in Advanced

- > Gimbal page in the Assistant software. No Receive r channel is asked to be mapped for the F2 or F3 port if gimbal function is enabled in the Assistant Software. Note: Even you map Receiver channels to F3 and F 2 (Which are shown as D3 and D 2 in the Assistant Software

- > Channel Mapping), the F3 and F 2 will not give output signal s from the mapped Receiver channels.



## 4.3 Flig ht Limits A ll unmanned aerial vehicle (UAV) operators should abide by all regulations from such organizations as the ICAO (Internationa l Civil Aviation Organization) and their own national airspace regulations. F or safety reasons, the flight
limits functio n is enabled by default to help users use this product safely and legally

. T he flight limits function includes height, distance limits and safety zone

.

I n Ready to Fly mode , height, distance lim its and No Fly Zones work together to manage flight. I n Ready to Fly (non

- GPS) status , only height limit s applies and flights cannot go higher than 120m.

D efault parameters in A ssistant Software are compliant within the definitions of class G ruled by ICAO. (Refer to Airspace Classification to get more details)

. A s each country has its own rules, make sure to configure these parameters to comp ly with these rules before flying

.



### 4.3.1 Max Height , Radius Limits & Home Fence The Max Height & Radius restri cts the flying height and distance. Configuration can be done in the A2 Assistant

. Once complete, your aircraft will fly in a restricted cylinder.©201 3

- 2014 DJI. All Rights Reserved. 40

GPS ATTI mode
Limits Ground Station Tips Max Height Flight height must b e under the set height. W arning: Height limit reached.
Max Radius F light distance must be within the max radius. W arning: Distance limit reached.

ATTI mode F light Limits Ground Station Tips Max Height Flight height restricted to 120m and under. W arning: Height limit reached.
Max Radius No limits

(1) If you fly out of the limit, you can still control the aircraft , but cannot fly it further. (2) If the aircraft flies out of the max radius in ATTI mode , it will fly back within range automatically

.

H ome fenc e is a safety feature that prevent s the aircraft from coming in too close to an operator

. When enabled,
the aircraft will not be able to enter a safe area defined by the user. Application examples: 1. S upply safe guard for new users in case of damage from wrong operation. 2. Keep users safe when aircraft flies close in a high spee d

. The safety radius can be set in the A2 Assistant as shown below:©201 3

- 2014 DJI. All Rights Reserved. 41

Assign a switch on the remote control to turn the home fence feature on and off. The safety radius range can be set between 12m and 100m.

(1) Home fence feature works only with GPS

- ATTI mode. NO home fence limit for ATTI mode and navigation mode. (2) Failsafe procedure overrides the home fencing feature.



### 4.3.2 Flight Limits of Special Areas
Restricted areas include airports worldwide. All restricted areas are listed on the DJI official website at http://www.dji.com/fly

- safe/category

- mc . Restricted areas are divided into category A and c ategory B. Category A areas cover major international airport such as LAX and Heathrow, while category B areas includes smaller airports. Category A Safety Zone

 The category A “safety zone” is comprised of a small “no

- fly zone” and a range of “restricted

- altitude zones”. Flight is prevented in the “no

- fly zone” but can continue with height restrictions in the restricted

- altitude zone.

 1.5 miles (2.4 km) around a designated safety zone is a no

- fly zone, inside which takeoff is prevented.

 1.5 miles (2.4 km) to 5 miles (8 km) around restricted areas are altitude restricted, with maximum altitude going from 35 feet (10.5 m) at 1.5 miles (2.4 km) to 400 feet (120 m) at 5 miles (8 km).

 A “warning zone” has been set around the safety zone. When you fly within 32 0 feet (100m) of the safety zone, a warning message will appear on the DJI Ground Station

.©201 3

- 2014 DJI. All Rights Reserved. 42 Category A

Category B Safety Zone

 Category B “safety zone” is comprised of a “no

- fly zone” and a “warning zone”.

 0.6 miles (1 km) arou nd the safety zone is a designated “no

- fly zone”.

 A “warning zone” has been set around the safety zone. When you fly within 0.6 miles (1Km) of this zone, a warning will appear on the DJI Ground Station

.

Category B

GPS ATTI mode
Zone Restriction R ear L ED Flight Indicator

No

- fly Zone Motors will not start.

I f the aircraft enters the restricted area in ATTI mode but GPS ATTI mode activates, the aircraft will automatically
descend to land then stop its motors after landing. B link red q uickly and continue for 3 seconds before normal
blinks.©201 3

- 2014 DJI. All Rights Reserved. 43

R estricted

- altitude flight zone I f the aircraft enters a restricted area in ATTI mode and

GPS ATTI mode activates, it will descend to a safe altitude and hover 15 feet below the sa fe altitude. B link yellow quickly and continue for 3 seconds before
normal blinks. Warning zone No flight restriction applies, but there will be warning

message.

Free zone No restrictions

. N one.

S emi

- automatic descen t : A ll stick commands are available except the throttle stick command during
the d escent and landing process . M otors will stop automatically after landing

. U sers must toggle the S1 switch to regain control. This is the same as regaining control durin g Failsafe. P lease refer to r egain

c ontrol d uring f ailsafe p rocedure

. (1) When flying in the No

- fly Zone , LED flight indicators will blink red quickly and continue for 3 seconds, then switch to indicate current flying status and continue for 5 seconds at w hich point it will switch back to red blinking. (2) When flying in the Restricted

- altitude flight zone and Warning zone, LED flight indicators will blink yellow quickly and continue for 3 seconds, then switch to indicate current flying status and
continue for 5 seconds at which point it will switch back to red blinking. (3) For safety reasons, please do not fly close to airports, highways, railway stations, railway lines, city centers and other special areas. Try to ensure the aircraft is visible.



### 4.3 .3 Conditio ns of Flight Limits In different working modes and flight modes, flight limits will differ according to number of GPS satellites found

. The following table demonstrate s all the cases( √ : available; × :unavailable ). All flights are restricted by height, dista nce and special areas simultaneously

. The Failsafe and Ground Station operations are not restricted to flight l imits , but if Ground Station function is used, the flight will be restricted the special area limits built in to Ground Station

. R efer to the Gro und Station manual for details.

C ontrol Mode number of GPS found Limits of Special A rea M ax Height Max Radius

GPS ≥ 6 √ √ √

< 6 × √ × ATTI. ≥ 6 √ √ ×©201 3

- 2014 DJI. All Rights Reserved. 44 < 6 × √ × Manual ≥ 6 × × ×

Flight Limits can b e disabled in the Assistant as below.

Users cannot take off the aircraft in some Special Areas even the Flight Limits is disabled in the Assistant

. 

## 4. 4 Parachute Function The A2 now supports the DJI Dropsafe parachute system which can be enabled in the A2 Assistant. The X3 and F4 ports should be connected. There are two methods to deploy the parachute. 1. Motors will automatically stop and the parachute will deploy by using switch on the remote control

. 2. In the event of an emergency (aircraft descends faster than 10 m/s), motors will automatically stop and the parachute will deploy.

(1) P arachute will deploy once the aircraft descends faster than 10 m/s in manual mode. (2) Once parachute function enabled, motors will automatically stop and the parachute will deplo y. (3) Refer to DJI D ropsafe user manual for more details.



## 4. 5 Gear function

Once enable the Intelligent Gear function , the gear is default down on the ground or in case of emergency (e.g. motor failure tolerance, auto landing); you can control it to be up or down by a switch when the aircraft altitude©201 3

- 2014 DJI. All Rights Reserved. 45

is above 5m during flight. Please configure in the Advanced

- > Gear page in the Assistant software. C onnect the landing gear of S800 EVO

to the Controller Unit as fig. below.
(1) Make sure to enable and config ure the Intelligent Gear function in the A ssistant software first, and then connect the gear to the F1 port. (2) T he Gear channel is required to be mapped with a channel on Receiver if the Intelligent Gear function is enabled in Assistant Software, and the F1 port will give output s for retracting control. (3) Once you map the Gear channel, F1 port will give output signal s from the controller for retract control. Otherwise, even the Intelligent Gear function is enabled ; F1 will give output from D1 ( it ’ s necessary to map the D1 channel with a channel on Receiver as your demands)

.



## 4. 6 Attitude Control When One Motor Output Fail s
For Hexa

- rotor, including Hexa

- rotor I, Hexa

- rotor V, Hexa

- rotor IY and Hexa

- rotor Y, the aircraft with A2 f light control system is attitude controllable when one motor output fails

. Select Course lock or home lock mode for flying the aircraft into a safe area to land when the aircraft is far away or the attitude can’t be recognized.



## 4. 7 DJI Assistant App Usage T here is a built

- in Bluetooth in the A2 LED

- BT

- I module . W ith a DJI Assistant App installed o n your mobile device, remote parameter configuration can be obtained via Bluetooth communication between the A2 Flight Control System and the mobile device

.©201 3

- 2014 DJI. All Rights Reserved. 46 

### S upported iOS devices
i P hone 4s, i P hone 5, i P hone 5s, i P od T ouch 5, i P ad 3, i P ad 4, i P ad air, i P ad mini , iOS6.1 or above is required. B luetooth version is required to be 4.0 or above.


### Required versions of DJI Assistant A pp & Firmware Require DJI Assist ant App version 1.1.14 or above and the firmware of A2 Controller Unit version 2. 1 or above, as well as the firmware of LED

- BT

- I module version 2.0 or above.


### Specifications
B luetooth version 4.0 E nvironment temperature

- 1 0 °C ~+50 °C C ommunication distance 50m Consumption 240mw(0.04A@6V)


### DJI Assistant App Usage Step 1 Download and installation
1. S earch the DJI Assistant in App store on mobile device and install it.
Step 2 Connect the A2 Controller Unit and the DJI Assistant App
1. Prepare an iOS device supported 4.0 B luetooth, and then enable the Bluetooth function on the mobile
device. 2. Power on the transmitter and the A2 Flight Control System, make sure the Bluetooth S tatus Indicator is
solid Red

. 3. Run the DJI Assistant App. You may be asked to register through internet when first login (the account of PC Assistant software is OK for login) ; follow the tips to set Main Controller name and password. 4. Observe the indicators on the left bottom of the software. ( connection indi cator and communication indicator) On the DJI Assistant App , if the communication indicator is , please double check the connections and driver installation; otherwise if the indicator is blinking , go to next step. 5. Select the “Basic” option. Please follo w step

- by

- step for your first

- time

- configuration. Basic configuration is necessary. Click the icon to get the configuration details. 6. You can click the “Advanced” option for more parameter settings. Advanced setting is optional. There are Motor, F/S , IOC , Gimbal, V oltage, Limits, Gear, etc. 7. C heck all parameters in the View page

. 8. Select “More” to obtain more details. Including: Restore MC default s ettings, A ccount s , Main Controller List, Information, wiki, Rate DJI Assistant, FAQ, Feedback, About

.
1. Make sure to upgrade the LED

- BT

- I module to the latest firmware via the PC Assistant software on a PC before you use the DJI Assistant App with the A2 Flight Control System.©201 3

- 2014 DJI. All Rights Reserved. 47

2. Every time you run the DJI Assistant App, the App will search the Controller Unit autom atically

. 3. The gain value displayed on Mobile Device and PC may be a little different, that is OK for use.
Step 3 Flying Test Procedures
1. Get the aircraft ready, run the DJI Assistant and make sure it is connected with the main controller. (The
indicators on the DJI Assistant are ) 2. Start the motors. 3. The “View” page shows the relative parameters real

- time when flying. 4. Go to the “Basic” and click into the “Gain” page to set the values of all gains real

- time during flying. 5. Go to the “ Basic ” and click into t he “ Tool ” page to view the values of IMU & Compass real

- time during flying. 6. Finish the flying and land your aircraft.

Only the parameter referred above can be changed during flying. Others can be configure d after landing.©201 3

- 2014 DJI. All Rights Reserved. 48 

# Appendix L ED indicator descriptions
Control mode GPS signal Manual Mode: No indicator Best ( > 6 ) : No indicat or ATTI . Mode : ( 1 ) ( sticks not in mid

- point (2) ) Good ( = 6 ) : (1) GPS ATTI. Mode : (1) (sticks not in mid

- point (2)) Bad ( = 5 ) : (2) Ground Station: (1) Worst ( < 5 ) : (3) 

### Flight Attitude Attitude good : No indicator Attitude status bad: (3) IMU data lost, calibrat e IMU needed : ( 4) 

### Compass calibration H orizontal calibration ( ∝ ) Calibration Failed ( ∝ ) Vertical calibration ( ∝ ) Abnormal Compass Data ( ∝ ) 

## Low voltage alert First level alert ( ∝ ) Second level alert ( ∝ ) 

## FailSafe mode During the Fai lSafe ( ∝ ) C ompass Abnormal after power on ( ∝ ) 

## E rrors S ystem Error (4) C ompass Abnormal after power on ( ∝ ) 

## IOC Recording
Record home

- point successfully (20) Aircraft is in the 8m range of HP (6) Record forward direction s uccessfully ( 20) Record a Point Of Interest success fully ( 20) 

## Bluetooth
A2 Assistant is connected / dis connected to the flight control system ( ∝ )

When the LED blinks (3) , please hover or land the aircraft and wait for the white LED to go off

. When the LED blinks ( 3), it is not recommended to fly. When the LED blinks ( 4), please contact your dealer.©201 3

- 2014 DJI. All Rights Reserved. 49 

## Specifications General Built

- In Functions 

###  Built

- in Receiver



###  Multiple C ontrol Modes 

###  2

- axle Gimbal Support ed 

###  Enh anced FailSafe 

###  Intelligent Orientation Control 

###  D ynamical S ystems Protection 

###  PC & Bluetooth Ground Station 

###  E xternal Receiver Supported 

###  9 Types of Supported Multi

- rotor 

###  Other DJI Products Support ed 

###  Low Voltage Protection 

###  4 C onfigurable Outputs 

###  Sound Alarm 

###  Co nfigure Parameters Via Bluetooth 

## Peripheral Supported Multi

- rotor  Quad

- rotor: I4, X4
 Hexa

- rotor: I6, V6, Y6, I Y6
 Octo

- rotor: X8, I8, V8 Supported ESC output 400Hz refresh frequency. Supported Transmitter for Built

- in Receiver Futaba FA SST (MULT, MLT2, 7CH) Series and DJI DESST Series E xternal Receiver Supported Futaba S

- Bus, DSM2 , PPM Recommended Battery 2S ~ 6S LiPo Other DJI Products Support ed Z15 , iOSD Mark II , D

- BUS Adapter , S1000,S900 EVO, 2.4G Data Link , H3

- 2D , H3

- 3D , DJI Dropsafe Parachute 

## Electrical & Mechanical Power Consumption MAX 5W ( Typical Value: 0.3A@12.5V ) Operating Temperature

- 5°C to +60°C Total Weight <= 224 g (overall) Dimensions  MC: 54mm x 39mm x 14.9mm
 IMU: 41.3mm x 30.5mm x 26.3mm
 GPS

- COMPASS PRO PLUS : 62 mm (diameter) x 14.3 mm  PMU: 39.5mm × 27.6mm × 9.8mm
 LED

- BTU

- I : 30mm x 30mm x 7.9mm 

## Flight Performance (can be effected by mechanical performance and payloads) Hovering Accuracy ( In GPS ATTI. Mode)  Vertical: ± 0.5m
 Horizontal: ± 1.5 m Maxi mum Wind Resistance <8m/s (17.9mph / 28.8km/h) Max Yaw Angular Velocity 150deg/s Max Tilt Angle 35° Ascent / Descent 6m/s©201 3

- 2014 DJI. All Rights Reserved. 50 

# FAQ U se with other DJI products

The A2 can be used with other DJI products such as iOSD Mark II , Z15 series gimbals , S800 EVO and 2.4G Data Link (iPAD Ground Station function) , H3

- 2D, H3

- 3 D , etc. U sers should connect them to the correct CAN

- Bus port. CAN1: iOSD Mark II , Z15 series

. CAN2: 2.4G Data Link (iPAD Ground Station function), H3

- 2D , H3

- 3 D

. The following 2.4G D ata L ink connection diagram is the connection for your reference

.

The following H3

- 2D connection diagram is the connection for your reference

.©201 3

- 2014 DJI. All Rights Reserved. 51

(1) H3

- 2D /3D users should upgrad e the firmware to the latest version (GCU V1.6& IMU V1. 6 or above). (2) If the 2.4G Data Link and H3

- 2D /3D are used at the same time, a CAN

- HUB module is required.
When using the A2 flight control system firmware version V 2.1 , the firmware of other DJI products used in conjunction must be matched with the requirements in the table below. Other DJI Products F irmware/Software Version (or above) Assistant Software( use to upgrade)
iOSD Mark II V3.0 iOSD V4.0 & OSD Viewer V4.0
Zenmuse H3

- 2D /3 D GCU V1.6 & IMU V1.6 & CMU1.0 H3

- 2D V1.02
Z15

- GH3 GCU V0.12 & IMU V1.4 Z15

- GH3 V1.00
Z15

- 5D GCU V0.12 & IMU V1.4 Z15

- 5D V1.00
Z15

- 5N/7N/GH2/5R GCU V0.0.12 & IMU V1.0.18_beta Z15 V1.4 2.4G Bluetooth Datalink T he Ground end V 1.0.1.5 & The Air End V 1.0.1 .1 & BTU V1.0.1.2 2.4G Bluetooth Datalink V1.0.0.6

iPAD Ground Station V1.3.56

----©201 3

- 2014 DJI. All Rights Reserved. 52 

## Channel Mapping Instruction s for PC Assistant Software

Basic Channel Default Settings Usage Description s A Roll Control of the Controller Unit , mapp ed

to the Channel 1 of Receiver During Assistant Software usage, please click
the “ Calibration ” button, to calibrate the Transmitter sticks travel. During calibrating, make sure to operate strictly following the prompts; otherwise may lead to calibration
failure. Click the “ Map ” button , then you can re - do mapping for A/E/T/R/U

. E Pitch Control of the Controller Unit ,

mapped to the Channel2 of Receiver
T Throttle Control of the Controller Unit ,

mapped to the Channel3 of Receiver
R Yaw Control of the Controller Unit , m apped

to the Channel4 of Receiver
U Control Mode Switch of the Controller Unit ,

mapped to the Channel7 of Receiver Others Default Settings Usage Descriptions
K1~K6 Remote Gains Adjustment of the Controller

Unit , unmapped. Click “ Unmapped ” button to ma p K1~K6 to the channels of Receiver.
Pitch Gimbal Pitch Control of the Controller Unit ,

unmapped. Click “ Unmapped ” button to map Pitch to a Receiver channel f or the gimbal servo control. D1~D4 Direct Channels (The corresponding ports

are F1~F4 on the Co ntroller Unit ) of Click “ Unmapped ” button to map D1~D4 to the Receiver channels. If you enable the©201 3

- 2014 DJI. All Rights Reserved. 53 Controller Unit , unmapped. Gimbal functions in Assistant Software, then the F3/F2 are used for gimbal contro l; e ven D3/D2 are mapped to channels of Receiver,
and the signals from the mapped Receiver channels will be ignored. You can use F 4 for switch ing the video
channel of iOSD Mark II , then map D4 to a Receiver channel. IOC IOC function of the Controller Unit ,

unmapped. Click “ Unmapped ” button to map IOC to a Receiver channel. It is recommended to use a 3

- position switch channel. Go Home One

- Key Go Home function of the

Controller Unit , unmapped. Click “ Unmapped ” button to map Go Home to the Receiver channel. It is recommended to

use a 2

- position switch chan nel. Gear Intelligent Gear function of the Controller

Unit , unmapped. If you enable the Gear function in Assistant Software, then the F1 is used for the gear

contro l of S800 EVO landing.
H3

- 2D /3D H3

- 2D /3D function of the Controller Unit,

unmapped. Click “ Unmapped ” button to map H3

- 2D /3D to a Receiver channel. It is recommended to use a Knob switch channel, which is only used for H3

- 2D /3D pitch control. H

- F ence( Home Fence ) Unmapped Click “ Unmapped ” button to map Home Fence on to the Receiver channel. It is
recommended to use a 2

- position switch
channel. CC ( Cruise Control ) Unmapped Click “ Unmapped ” button to map Cruise Control to the Receiver channel. It is
recommended to use a 3

- position switch
channel. The Pitch and the H3

- 2D /3D channels can be used at the same time. The Pitch is for the pitch control of servo gimbal, and the H3

- 2D /3D is for the pitch control of H3

- 2D /3D gimbal©201 3

- 2014 DJI. All Rights Reserved. 54 

## Recommended Mapping for Futaba Transmitter (Mode 2) User

Controller Unit Channel Receiver Channel Recommended Transmitt er Switch
A Channe 1 (AIL) Joystick J1
E Channe 2 (ELE) Joystick J2
T Channe 3 (THR) Joystick J3
R Channe 4 (RUD) Joystick J4
U Channe 7 (AUX 5 ) 3

- Position switch , e.g. SG
K1~K6 Channe 5 ( GEAR ) Knob switch , e.g. LD , RD
Pitch Channe 6 ( Vpp ) Knob swi tch , e.g. LD , RD
D1 / D 3/ D2

---- ---- D4 Channe 9 (AUX1) 2

- Position switch , e.g. SF IOC Channe 10 (AUX 2 ) 3

- Position switch , e.g. SG Go Home Channe 11 (AUX 3 ) 2

- Position switch with spring back function, e.g. SH Gear Channe 8 (AUX4) 2

- Position switch , e. g. SF
H3

- 2D Channe 12 ( AUX5 ) Knob switch, e.g. LD 、 RD



## Settings of gain values for Your Reference To set the value of basic gain and attitude gain you can refer to the following diagram . T hese values are only for reference and may vary in practice.



## The Transmitter setup of FUTABA P lease configure the Frequency item on your Transmitter adhere to the table below . (The names of FASST modes here are based to the Transmitter FUTABA T8FG, please ensure to select the most similar m ode as the names differs for different Transmitters) A ircr aft Configuration Information Basic Attitude

Motor ESC Propeller Battery Weight Pitch Roll Yaw Pitch Roll Vertical F450 DJI

- 2212 DJI

- 30A DJI

- 8 Inch 3S

- 2200 890 g 150 150 135 150 150 140
F550 DJI

- 2212 DJI

- 30A DJI

- 8 Inch 4S

- 3300 1530 g 170 170 150 160 160 150
S800 EVO / Z15 DJI

- 4114 DJI

- 40A DJI

- 15 Inch 6S

- 15000 7000g 140 140 130 140 140 130
S1000 / 5D gimbal/
5D camera DJI

- 4114 DJI

- 40A DJI

- 15 Inch 6S

- 15000 9200g 120 120 120 170 170 120

S1000 / 5D gimbal/
5D camera DJI

- 4114 DJI

- 40A DJI

- 15 Inch 6S

- 15000 9 3 00g 1 20 120 120 170 170 120©201 3

- 2014 DJI. All Rights Reserved. 55 Transmitter type AREA FASST
FUTABA 18MZ Default FASST

- MULTI \ FASST

- 7CH FUTABA 14MZ with TM

- 14 Default MULT \ 7CH FUTABA 14SG FRANCE \ GENERAL FASST

- MULTI \ FASST

- 7CH FUTABA 12Z 2.4G FASST with TM

- 14 Defaul t MULT \ 7CH FUTABA 12FG 2.4G FASST with TM

- 14 Default MULT \ 7CH FUTABA 10CG or 10C with TM

- 10 Default 7CH FUTABA 9C SUPER with TM

- 7 or TM

- 8 Default 7CH FUTABA 8FG SUPER FRANCE \ GENERAL MLT2 \ MULT \ 7CH FUTABA 8FG FRANCE \ GENERAL MULT/7CH FUTABA 7C 2.4G Defa ult Default FUTABA 6EX FASST Default Default©201 3

- 2014 DJI. All Rights Reserved. 56 

# Disclaimer Please read this discl aimer carefully before using th is product. By using this product, you hereby agree to this disclaimer and signify that you have read it fully. THIS PRODUCT IS NOT SUITABLE F OR PEOPLE UNDER THE AGE OF 18. A2 flight controller is designed for experience multi

- rotor enthusiasts providing excellent self

- leveling and altitude holding, which completely takes the stress out of flying RC multi

- rotors for both professional and hobby a pplications. Despite the product having a built

- in flight control system and our efforts in making the operation of the controller as safe as possible when the main power battery is connected, we strongly recommend users to remove all propellers when calib rating and setting parameters. Make sure all connections are good, and keep children and animals away during firmware upgrade, system calibration and parameter setup. DJI Innovations accepts no liability for damage(s) or injuries incurred directly or indir ectly from the use of this product in the following conditions: 1. Damage(s) or injuries incurred when users are drunk, taking drugs, drug anesthesia, dizziness, fatigue, nausea and any other conditions no matter physically or mentally that could impair your ability. 2. Damage(s) or injuries caused by subjective intentional operations. 3. Any mental damage compensation caused by accident. 4. Failure to follow the guidance of the manual to assemble or operate. 5. Malfunctions caused by refit or replacement with non

- DJI acc essories and parts. 6. Damage(s) or injuries caused by using third party products or fake DJI products. 7. Damage(s) or injuries caused by mis

- operation or subjective mis

- judgment. 8. Damage(s) or injuries caused by mechanical failures due to erosion, aging. 9. Damage (s) or injuries caused by continued flying after low voltage protection alarm is triggered. 10. Damage(s) or injuries caused by knowingly flying the aircraft in abnormal condition (such as water, oil, soil, sand and other unknown material ingress into the airc raft or the assembly is not completed, the main components have obvious faults, obvious defect or missing accessories). 11. Damage(s) or injuries caused by flying in the following situations such as the aircraft in magnetic interference area, radio interferenc e area, government regulated no

- fly zones or the pilot is in backlight, blocked, fuzzy sight, and poor eyesight is not suitable for operating and other conditions not suitable for operating. 12. Damage(s) or injuries caused by using in bad weather, such as a r ainy day or windy (more than moderate breeze), snow, hail, lightning, tornadoes, hurricanes etc. 13. Damage(s) or injuries caused when the aircraft is in the following situations: collision, fire, explosion, floods, tsunamis, subsidence, ice trapped, avalanche , debris flow, landslide, earthquake, etc. 14. Damage(s) or injuries caused by infringement such as any data, audio or video material recorded by the use of aircraft. 15. Damage(s) or injuries caused by the misuse of the battery, protection circuit, RC model and b attery chargers. 16. Other losses that are not covered by the scope of DJI Innovations liability. 

# T rademark DJI and A2 are registered trademarks of DJI. Names of product, brand, etc., appearing in this manual are trademarks or registered trademarks of their respective owner companies. This product and manual are copyrighted by DJI with all rights reserved. No part of this product or manual shall be reproduced in any form without the prior written consent or authorization of DJI. No patent liability is assumed with respect to the use of the product or information contained herein.