Abstract:
The inventive method interacts with a project planning window, which has a working area at least with one window for a project planning level for displaying and linking graphic objects and with a window for a symbol library containing the graphic objects available for a project planning. To this end, graphic control objects are provided, which represent technical objects of the installation and graphic control unit objects, which represent control units that can be used for a control. In a first step, the control objects of a project planning are activated in the window for the system library and transmitted into the project planning level. In a second step, the transmitted control objects are, in the window of the project planning level, subsequently linked in a logical manner according to a control task. In a third step, at least one control unit object is activated in the symbol library and transmitted into the project planning level. In a fourth step, the graphic control unit object is assigned to selected graphic control objects. The invention offers the advantage of enabling, in a closed project planning method, both the graphic control objects, which are required for controlling installation resources, as well as control unit objects, which are required for operating and monitoring the control, to be linked in a defined and logical manner.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is the US National Stage of International Application No. PCT/EP2004/008349, filed Jul. 26, 2004 and claims the benefit thereof. The International Application claims the benefits of German Patent application No. 10339764.7 DE filed Aug. 27, 2003, both of the applications are incorporated by reference herein in their entirety. 
     FIELD OF THE INVENTION 
     The field of the invention is directed towards an inventive method that interacts with a project planning window, which has a working area at least with one window for a project planning level for displaying and linking graphic objects and with a window for a symbol library containing the graphic objects available for a project planning. 
     BACKGROUND OF THE INVENTION 
     It is known that the control of a technical installation by an automation system, e.g. a programmable logic controller, can be planned by means of graphic methods and mechanisms. SIEMENS for example uses Software STEP 7, which allows a user to create control programs based on functional software components. Depending on the application, a number of different functional software components, e.g. operational components, data components, system components, organizational components, etc. are defined graphically and linked logically with the aid of visual means to a control program. The control program then prompts a programmable logic controller PLC to operate the operating means of the respective technical process, e.g. sensors, drives, valves, etc. in the manner defined by the functional software modules and their logical links in the control program. Data telegrams are thereby generally exchanged via a field bus, for example in real time between installation operating means and the PLC. 
     The operating and monitoring level is of increasing significance along with this purely control level. Special hardware and software, also referred to as HMI elements, are available for this. Different types of HMI terminals, also referred to as operator interfaces, are available for display and operating purposes. There is a wide range of display and operating units, from a simple push button panel, in other words an array of programmable function buttons, to a multifunctional panel, in other words an LCD display, which can also be configured as a touch screen. These are connected via special connections or a field bus to the technical installation and the programmable logic controller. Planning software is also required for the operator panels. This on the one hand allows planning of the data connection from the HMI hardware used for operating purposes to the automation system and the controlled technical installation. It can be used in particular in the simplest instance to select displayable measured values or installation operating means provided for operating purposes, in other words for providing with target values. On the other hand the planning software allows a user to select and configure the type and scope of the values from the technical installation displayed on the HMI hardware in an application-specific manner. These can range from simple message texts to complex, interactive process mappers. Simple planning software therefore allows direct planning of HMI panels. HMI projects for operator panels can be implemented with special visualization software for installation and machine-related visualization. Finally complex processes can be visualized with the aid of SCADA or supervisor control and data acquisition software, meaning that they can be monitored and operated in a more user friendly and reliable manner by operators of a technical process. 
     Until now it has been standard practice when automating a technical installation for the planning of the control program for the programmable logic controller to be separate from the planning of HMI elements. An HMI system is often loaded onto an already planned control program at a later stage. Even if the functional software components and their links in the control program can be accessed during this process, the HMI component program is generally created at a different time, primarily using separate HMI planning software. This is complex and time-consuming. 
     SUMMARY OF THE INVENTION 
     The object of the invention is to specify a method for the graphic planning of the control of a technical installation and a corresponding graphic planning system, with which planning of HMI elements is also possible in a work sequence or with a planning tool, in addition to the creation of the control program. 
     The objects are achieved with the method specified in the claims and the system specified in the claims. 
     The claimed method for the graphic, object-based planning of a control for a technical installation interacts with a planning window, which has a work area at least with one window for a planning level for displaying and linking graphic objects and with one window for a symbol library containing the graphic objects available for planning. Graphic control objects at least are thereby present, representing technical objects of the installation, as well as graphic operating device objects, which represent operating devices that can be used for a control. 
     In a first step of the claimed method the graphic control objects of planning are activated in the window for the symbol library and transferred to the window for the planning level. Then in a second step in the window for the planning level the transferred graphic control objects are linked logically according to an installation-specific control task. Then in a third step at least one graphic operating device object is activated in the window for the symbol library and transferred to the window for the planning level. Finally in a fourth step of the claimed method the graphic operating device object is assigned to selected graphic control objects. 
     The invention has the particular advantage that it is possible to define and logically link both the graphic control objects required for the control of installation operating means and the operating device objects necessary for the operation and monitoring of the control of the technical installation in a closed planning method. With the aid of the invention the planning of the HMI functions is therefore integrated into the overall planning both with regard to execution and function. It is particularly advantageous that the elements available for the planning of the graphic control objects in the planning window, i.e. the windows for the symbol library and the planning level, are also used in the same manner for the planning of the graphic operating device objects for the HMI panels used. 
     It is advantageous if the activation and transfer of graphic control or operating device objects in the planning window are effected by means of graphic interactions. Drag and drop actions in particular are used on the graphic objects as graphic interactions with the aid of graphic operating means. 
     To improve the functionality of the claimed planning method further, a further window may be present in the planning window, in which a directory tree is automatically generated and managed for the graphic objects in the planning level. 
     This embodiment facilitates planning transparency, as the levels of the list structure of a directory tree ensure a better overview of the respective planning status than the content of the planning level. Also the directory tree can be used to switch between the different display contents of the window for the planning level in a simple and transparent manner. It is therefore possible for the graphic objects associated with a branch of the directory tree to be displayed in the window for the planning level by means of graphic interactions in the directory tree, in particular by means of activations. 
     The directory tree is advantageously structured such that it has a first and a second main branch. The graphic control objects of planning at least can be activated in the first main branch and the graphic operating device objects of planning at least can be activated in the second main branch. This structure highlights the advantage of the invention, in that during planning the graphic control objects required for process management of the technical installation and the graphic operating device objects used for the associated operation and monitoring are managed with approximately equal priority in corresponding main branches of the directory tree. 
     Finally according to a further embodiment of the claimed method it is advantageous for the directory tree to have a third main branch, in which the connections to a data bus assigned to the graphic control objects are managed. Such a structure then provides an optimum overview and access to the most important levels, which have to be planned during automation of a technical process, namely the control level, the operating and monitoring level and the data transmission level, in particular via a field bus. 
     The claimed system for the graphic planning of a control for a technical installation has a planning window, graphic interaction means and planning means. The planning window thereby has a work area, which according to the invention is divided at least into one window for a symbol library containing the graphic objects available in the system for the planning of a technical installation, one window for a planning level for displaying and logically linking the graphic objects selected for the planning of a technical installation and one window for a directory tree of the graphic objects of planning selected in the window for the planning level. The graphic interaction means allow the selection of graphic objects in the window for the symbol library and the generation and logical linking of the selected graphic objects in the window for the planning level. The planning means then automatically adjust the directory of graphic objects in the window for the directory tree after generation of the selected graphic objects in the window for the planning level. 
     This claimed system allows the compact and per se closed planning of all graphic objects required for automation in a single planning tool. All types of graphic objects can hereby be processed in the same manner, depending on the content of the symbol library. Preferably at least available graphic control objects, which represent technical objects of a technical installation, and graphic operating device objects, which represent operating devices that can be used for a control, are thereby present as graphic objects in the symbol library. 
     The graphic interaction means particularly advantageously allow the selection and assignment of a graphic operating device object to a group of graphic control objects and the planning means automatically generate a set of operating sub-objects for the graphic operating device object after assignment in the window for the directory tree. 
     The flexibility of the claimed system is particularly clear with this embodiment, in that a graphic operating device object can be assigned as a function of the respective structure of the technical installation and the operating and monitoring requirements of the respective operator to all, a group of or even individuals of the associated graphic control objects as a function of the application during the planning of the control. A set of operating sub-objects is then generated automatically as a consequence in the directory tree. These can be graphic operating objects, alarm objects, formulation objects, archive objects, etc., which are automatically provided for the planning of an operating device. This will be described in even more detail below with reference to the exemplary embodiments shown in the figures. 
     The invention is also directed towards a computer program product with a computer program, having software means to implement the above-mentioned method for the graphic planning of a control for a technical installation, when the computer program is executed in a data processing system, an HMI device, an automation system or a graphic planning unit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further advantageous configurations are set out below in the context of the description of the advantageous embodiments shown in the figures. 
       The invention is described in more detail with reference to the figures referred to briefly below, in which: 
         FIG. 1  shows an exemplary embodiment of a planning window of the claimed planning system, 
         FIG. 2  shows an application of the planning window in  FIG. 1  for the planning of an exemplary control, with the definition, transfer and linking of graphic control objects of planning being effected between the symbol library and the planning level by means of drag and drop actions, 
         FIG. 3  shows the planning window in  FIG. 2 , with activation and assignment of an operating device object from the symbol library to the graphic control objects in the planning level being effected by means of drag and drop actions, 
         FIG. 4  shows an assignment of an operating device object to the graphic control objects of planning by means of a drag and drop action in the window for the directory tree, as an alternative to that in  FIG. 3 , and 
         FIG. 5  shows the planning window in  FIG. 3  in a detailed HMI view, with operating sub-objects assigned to the graphic control objects of planning being generated automatically in the directory tree for the operating device object and being displayed in an overview in the planning level. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  shows an exemplary embodiment of a planning window  1  configured according to the claimed planning system. The planning window  1  is also the basis for the illustrations in the further  FIGS. 2 to 7 , which are used by way of an example to describe the individual steps of the claimed planning method. 
     The exemplary planning window  1  is divided horizontally by way of an example into three areas, i.e. an upper window area  1  for toolbars, a middle window area  5  for the work area, also referred to as the workbench, and a lower window area  7  for status information. The upper window area  1  contains four further toolbars in the example. The first toolbar  31  for the program and file display on the one hand contains a designation of the program name according to the conventions of windows-based programs. The claimed planning system in the example is thereby labeled with the designation “CBA—Engineering”, CBA being an abbreviation for component based automation. It is followed in square brackets by the designation of the respective project file, for which in the present instance an individual project name has not yet been assigned, therefore the general designation [New Project] appears. The toolbar  32  below contains pulldown menus for program operation and the toolbar  33  contains standard user functions. As the toolbars  32 ,  33  in the upper window area  3  and the lower window area  7  for status information also correspond to the conventions for windows-based programs, they will not be described in any more detail below. 
     According to the invention the middle area of the planning window  1  provided for the work area  5  is again divided into three windows, namely one window  51  for a directory tree  510 , one window  52  for a planning level and one window  53  for a symbol library  531 . In the example in  FIG. 1  these are disposed vertically next to each other and are labeled “Plant”, “Control/Network/HMI” and “Library”. 
     According to the invention the window  52  is used for the planning level, to display and link graphic objects during control planning. The windows  53  and  51  to the right and left in the example in  FIG. 1  are used to assist this graphic planning. Therefore the graphic objects available in a symbol library  531  for planning are listed in the window  53 . According to the invention at least graphic control objects representing technical objects of the installation are present, as are graphic operating device objects representing operating devices that can be used for a control. The control objects can also be referred to as CBA or component based automation objects and the operating device objects as HMI or human machine interface objects. In the example in  FIG. 1  the content of the symbol library  531  is advantageously divided into folders. Planned projects that have already been undertaken could for example be stored in the folder  5311  “Project Library”. The folders  5312  and  5313  contain collections of graphic control objects, with objects representing “Conveyor-Elements” collected in  5312  and objects representing the control components or the “Control system” being collected in  5313 . In the example in  FIG. 1  the folders  5314  and  5315  contain graphic operating device objects, with the HMI devices that can be used in planning being listed in  5314  “HMI-System” and available operating elements being listed in  5315  “Visualization”. The graphic objects contained in each folder are shown in a display area  532  below. This is described in more detail in  FIGS. 2 to 7 . 
     During planning an operator can mark objects required specifically for the installation in the corresponding folder in the window  53  and also in the window  51  for the directory tree  510  and advantageously transfer them to the planning level  52  with the aid of graphic interactions. The interactions used on the graphic objects can advantageously be drag and drop actions with the aid of graphic operating means, in particular a visual cursor  9  guided using a so-called computer mouse. 
     According to the invention the graphic control objects generated and logically linked in the planning level  52  are automatically visualized in the window  51  for the directory tree  510 . The directory tree  510  shown in  FIG. 1  has three main branches  511 ,  512 ,  513  for this purpose, which are only shown partially in  FIG. 1  but are shown in more detail in the subsequent figures. The first main branch  511  marked CONTROL lists the graphic control objects of planning. The part of the installation described in more detail below is for example referred to as LINIE 1  (LINE  1 ). The graphic operating device objects of planning are listed in a further main branch  513  marked HMI. In the example illustrated in the figures an operating device is used, which is marked in the directory tree  510  as PANEL. 
     According to an advantageous further embodiment already shown in  FIG. 1 , the directory tree  510  has a third main branch  512  marked NETWORK. The connections to a data bus assigned to the graphic control objects in the main branch  511  CONTROL during planning are managed here. A device referred to as MASTER is already listed as a main unit connecting the control objects to a data bus in the main branch  512 . 
     The individual main branches  511 ,  512 ,  513  can be activated, again preferably by graphic interactions using the visual cursor  9 . This displays the associated project components in the planning level  52 . This is shown in the header line of the planning level  52  by the heading “Control/Network/HMI”. The subsequent figures show how further planning components can be visualized in the planning level  52  by activating secondary and sub-branches of a main branch in the directory tree  510 . It is also possible to switch between these display statuses of the window  52  for the planning level by means of appropriately labeled virtual switch elements in the toolbar  34 . The status “Control”, “Network” or “HMI” can thereby be activated in the planning level  52  by activating a button  341 ,  342  or  343  in the toolbar  34 . 
       FIG. 2  shows an application of the planning window  1  in  FIG. 1  for the planning of an exemplary control, with graphic control objects of planning being defined, transferred and linked between the symbol library  531  and the planning level  52  by means of drag and drop actions DD 1 -DD 4 . The part to be planned in the example shown is a conveyor belt in a technical installation. For planning purposes therefore the folder  5312  in the symbol library  531  is activated, which contains “Conveyor Elements”. It contains graphic control objects, which represent corresponding installation components. Control objects TURNTABLE  53121 , ROLLERWAY  53122 , Master  53123  and CONVEYORBELT  53124  are therefore listed by way of an example in the display area  532  of the folder  5312 . 
     According to the claimed planning method in a first step the graphic control objects required for the respective planning are activated in the window  53  for the symbol library  531  and transferred to the window  52  for the planning level. Thus in the example in  FIG. 2  the graphic control object  53121  TURNTABLE is activated in the display area  532  and moved preferably by means of a drag and drop action DD 1  using the cursor  9  to the planning level  52 . There the planning system automatically generates a logically linkable functional software component  52 C 1  TURNTABLE, which has a number of inputs and outputs on the left and right sides. These represent all the parameterizable input and output variables of the respective functional software module and are only labeled symbolically in the figures for the purposes of simplicity. To complete the planning, a control object  53122  ROLLERWAY, a further control object  53122  ROLLERWAY and a control object  53123  MASTER have been activated correspondingly by means of further drag and drop options DD 2  to DD 4  and transferred to the planning level  52 . The planning system generates the functional software components  52 C 2  ROLLERWAY,  52 C 3  ROLLERWAY and  52 C 4  MASTER there, again automatically. No control object of the type CONVEYORBELT  53124  is required in the example. 
     In a second step of the claimed planning method the transferred graphic control objects  52 C 1  to  52 C 4  are linked logically in the window  52  of the planning level according to an installation-specific control task. The control is thus programmed by a logical linking of selected input and outputs of the associated functional software component. The resulting logical linking network in the example in  FIG. 2  is marked with the reference character  52 L. 
     According to the invention the directory tree  510  is automatically updated in the window  51  based on the above planning operations. Therefore the planning system has generated specific sub-branches  51111  “Turntable  1 ”,  51112  “Rollerway  1 ”,  51113  “Rollerway  2 ” and  51114  “Master  1 ” for every graphic control object  52 C 1  to  52 C 4  in the planning level below  52  the sub-branch  5111  LINIE 1  (LINE  1 ) in the main branch  511 . These can be activated individually. Activating a sub-branch makes it possible to display specific HMI or service representations for example in the planning level  52 . The planning system also completed the sub-branches to the main branch NETWORK  512  correspondingly. The sub-branches  51211  “Turntable  1 ”,  51212  “Rollerway  1 ” and  51213  “Rollerway  2 ” associated with the graphic control objects are thereby subordinated to the sub-branch  5121  “MASTER  1 ”. This is explained below with reference to  FIG. 3 . 
       FIG. 3  shows the planning window in  FIG. 2  with an operating device object being activated, transferred and assigned from the symbol library to the graphic control objects in the planning level by means of drag and drop actions. So that this is possible, the folder  5314  containing the available graphic operating device objects is active in the symbol library  531 . In the example in  FIG. 3  three operating device objects are available for selection for planning in the display area, i.e. an operating device object  53141  of the type “MP270”, an operating device object  53142  of the type “OP370” or an operating device object  53143  of the type “PC670”. 
     In the example shown in a third step of the claimed planning method the graphic operating device object  53141 , representing an operator panel of the type “MP270”, is first activated in the window  53  of the symbol library and transferred to the planning level  52 . As the status “Network” is active in the planning level in the example in  FIG. 3  and therefore the data transmission link for the graphic control objects of planning via system and field buses is shown, a corresponding network object  52 N 5  is generated by transferring the graphic control object  53141  for the PANEL 1 . This is effected automatically by the planning system in the same manner as the network objects  52 N 2  “Rollerway  1 ”,  52 N 3  “Turntable  1 ”,  52 N 4  “Rollerway  2 ” and  52 N 5  “Panel  1 ” are linked to a field bus, which is of the PROFIBUS type in the example in  FIG. 3 . The field bus  52 B 2  is in turn linked via the network object  52 N 1  “Master  1 ” to a system bus  52 B 1 , which is of the ETHERNET type in the example in  FIG. 3 . 
     Once the graphic operating device object  53141  has been selected and transferred, according to the invention the directory tree  510  is again extended correspondingly in the window  51  in  FIG. 3 . A sub-branch  5131  connected to the main branch  513  is thus generated for the graphic operating device object and labeled PANEL 1 . According to further embodiments of the invention already shown in  FIG. 2 , different operating sub-objects are assigned automatically to the PANEL 1  by the planning system, in the example the operating sub-objects  51311  PICTURE,  51312  ALARM,  51313  RECIPEEN (FORMULATIONS) and  51314  ARCHIVE (ARCHIVE). So for example by activating the sub-branch  51311  PICTURE in an overview image in the planning level  52  it is possible to display the graphic operating objects  5131111 ,  5131112 ,  5131113  automatically assigned to each graphic control object of the group LINIE 1  (LINE 1 ). This is explained in more detail based on the example in  FIG. 5 . 
     Alarm objects can also be assigned automatically to each graphic object in the LINIE 1  (LINE 1 ) group as the second operating sub-objects  51312  in the window  51  for the directory tree  510 . Alarm statuses, alarm texts, etc. can hereby be planned separately for each graphic control object. The respective alarm objects can also be displayed here by activating the sub-branch  51312  in the planning level  52 . Finally a formulation object or an archive object can be automatically assigned to each graphic control object in the LINIE 1  (LINE  1 ) group as third or fourth operating sub-objects  51313  or  51314  in the window  51  for the directory tree  510 . Particularly if a graphic control object represents a method-related component in a process automation installation, it can be allocated a specific control sequence via a formulation object. Finally an archive object allows sequenced and, most importantly, retrievable storage for example of miscellaneous process data, messages and operating parameters, e.g. target value adjustments, which occur during ongoing operation of the planned technical installation. 
     Finally the directory tree  510  in the main branch  512  NETWORK is also automatically extended. A Network sub-branch  51214  assigned to the newly defined PANEL 1  is thus shown connected to the sub-branches  51211  “Turntable  1 ”,  51212  “Rollerway  1 ” and  51213  “Rollerway  2 ” present for the graphic control objects of planning. By activating one of the sub-branches, e.g. the sub-branch  51211  “Turntable  1 ”, it is possible to display views in the planning level  52  showing details corresponding to an interface module, for example of the type “S 7  ET 200×BM147” assigned to the Turntable  1  and allow parameterization. 
     This is followed by the fourth step of the claimed planning method, namely the assignment of the activated and transferred graphic operating device object PANEL 1   52 N 2  to the group of LINIE 1  (LINE 1 ) graphic control objects present in the planning level  52 . Only then is the planning of the technical installation completed with regard to control and operation. Various options are available in practice for implementing this step. Essentially implementation of the fourth step is a function of the status active in the planning level  52 , e.g. the CONTROL or NETWORK status. A link to a selected and transferred graphic operating device object is therefore possible when with active CONTROL status the functional software modules  52 C 1 - 52 C 4  are displayed or with active NETWORK status the network objects  52 N 1 - 52 N 4  of the graphic control objects are displayed. 
       FIG. 3  shows an option for assignment based on the example of the planning level  52  in the NETWORK status. The sub-branch  5111  of LINIE 1  (LINE 1 ) is thereby activated by means of a graphic interaction DD 6 , in particular by a drag and drop action, in the directory tree  510  and moved into the planning level  52  to the network object  52 N 5  of PANEL 1 . The planning system then assigns PANEL 1  to the group of control objects marked LINIE 1  (LINE 1 ). Now according to the object of the invention the planning of at least one HMI element is implemented in addition to the planning for control purposes by logical linking of the selected and generated graphic control objects. In another instance (not shown) it would also have been possible to activate the sub-branch  51111  “TURNTABLE  1 ” and move it into the planning level  52  to the network object  52 N 5  of PANEL 1 . The panel of type MP270 would then have been allocated solely for the operation and monitoring of a single rotary table in the technical installation, represented by a control object TURNTABLE. 
       FIG. 4  shows a further option for assignment of the selected operating device object PANEL 1  to the graphic control objects of planning by means of a drag and drop action in the window  51  with the directory tree  510 , as an alternative to  FIG. 3 . The planning level  51  is thereby in CONTROL status, i.e. the linked functional software components of the control objects are shown. As already described above, the directory tree  510  is constantly updated while graphic planning is implemented. On the one hand a sub-branch  51214  PANEL 1  was extended in the main branch NETWORK  512  with the activation and transfer of a graphic operating device object as described above. A sub-branch  5131  PANED was also extended in the main branch HMI  513 . There are thus two branches available for a link in the directory tree  510 . The sub-directory  5111  LINIE 1  (LINE 1 ) can therefore be moved either by means of a graphic interaction DD 7  to the sub-directory  5131  PANEL 1  or by means of an interaction DD 8  to the sub-directory  51214  PANEL 1 , thereby completing the required assignment. 
       FIG. 5  shows the planning window in  FIG. 3  in a detailed HMI view, with the operating sub-objects assigned to the graphic control objects of planning being generated automatically in the directory tree for the operating device object and being displayed in an overview image in the planning level. In  FIG. 5  the status HMI is therefore activated particularly in the planning level  52 . By activating the end branch  513111  Linie 1  (Line 1 ) in the sub-branch  51311  PICTURE in the directory tree  510 , it is possible to display the graphic operating objects  52 H 1  for TURNTABLE  1 ,  52 H 2  for ROLLERWAY  1  and  52 H 3  for TURNTABLE  2  automatically assigned to each graphic control object of the group LINIE 1  (LINE 1 ) in an overview image in the planning level  52 . The operating objects  52 H 1 ,  52 H 2  and  52 H 3  can thereby be freely positioned by a user in the overview image with the aid of graphic interactions. The overview image can thus be configured and further planned as a function of the application, to facilitate operation and monitoring of the installation. Further operating element objects can thus be generated in the overview image for example for access to the operating objects  52 H 1 ,  52 H 2 ,  52 H 3 . In the example in  FIG. 5  operating element objects are defined for this purpose for a virtual forward button  52 V 1 , a back button  52 V 2 , a help button  52 V 3  and an alarm indicator  52 V 4 . These can be used for example to carry out manual operations on one of the operating objects  52 H 1 ,  52 H 2 ,  52 H 3 , i.e. agreeing a simulation of manual operation or alarm states. 
     The generation of such operating element objects is advantageously also effected by means of graphic planning. To this end the folder  5315  is activated in the window  53  for the symbol library in  FIG. 5 . The operating element objects available for visualizations in HMI activation status of the planning level  52  are shown in the display area  532 . HMI switch elements SWITCH, freely assignable HMI symbols SYMBOLS, HMI display elements PICTUREELEMENT, etc. are therefore available. In the example in  FIG. 5  the above-mentioned operating element objects  52 V 1 ,  52 V 2 ,  52 V 3  and  52 V 4  for example have been moved by means of drag and drop actions DD 8  to DD 11  from the window  52  for the symbol library to the planning level  52  and positioned there as a function of application. 
     Finally end branches  5131111 ,  5131112 ,  5131113  are available in the directory tree  510  for the graphic operating objects  52 H 1  TURNTABLE 1 ,  52 H 2  ROLLERWAY 1 ,  52 H 3  ROLLERWAY 2 . By activating one of these branches it is possible to display detailed views in the planning level  52 , allowing detailed planning of the assigned control object. Activation of the end branch  5131111  thus allows an operating component to be displayed, allowing parameters for a set-up operation, diagnosis and optimization.