Device Profile Measurement Devices and Closed Loop Controllers DSP 404 V1.0 members only The purpose of this device profile is to describe units for measuring or closed loop control of different physical quantities. As such devices may include quite different functionality, the profile specifies different functional blocks, which could be combined in a real device. The purpose of the devices described in this document is to measure or control a physical quantity in a process environment. Often these types of devices are implemented as multiple channel devices. Once configured via SDO, the device is able to run its measuring or control tasks without necessarily needing further real time communication with host systems.
Every device has a large amount of data for configuration purposes.
The control loop itself is realised in the controller device. In order to reduce busload the device communicates based on events. In general there are three types of events - information, warnings and errors. The event-based communication can be established in the following manner. The device indicates the host device in the network that an event has occurred.