Using the MC-PreServo and MC-PostServo organization blocks
SIMATIC S7-1500 CPUs support the connection of drives as a speed axis or positioning axis via PROFINET, PROFIBUS or an analog drive connection.
In the present application example, a hydraulic valve is to be configured and used as positioning axis. The position is detected via an analog input of the controller.
- For use a analog position value in the technology object, the value must be edit. The program required for this is called up in the MC-PreServo organization block.
- The non-linear behavior of the hydraulic valve requires an adjustment of the set point. The program required for this is called up in the MC-PostServo organization block.
The example program, which is contained in this application example in form of a download, shows the operation of a hydraulic valve as positioning axis by use of the MC-PreServo and MC-PostServo organization blocks.
04/2018 correction the process image of the analog input module