Siemens SIMATIC S7-1200 Function Manual page 76

Using PID_Compact
4.2 PID_Compact V2
Output value V2
PID_Compact offers three output values. Your actuator will determine which output value
you use.
● Output_PER
The actuator is triggered via an analog output and controlled with a continuous signal,
e.g. 0...10V, 4...20mA.
● Output
The output value needs to be processed by the user program, for example because of
nonlinear actuator response.
● Output_PWM
The actuator is controlled via a digital output. Pulse width modulation creates minimum
ON and minimum OFF times.
Procedure
Proceed as follows to use the analog output value:
1. Select the entry "Output_PER (analog)" in the drop-down list "Output".
2. Select "Instruction".
3. Enter the address of the analog output.
Proceed as follows to process the output value using the user program:
1. Select the entry "Output" in the drop-down list "Output".
2. Select "Instance DB".
The calculated output value is saved in the instance data block.
3. For the preparation of the output value, use the output parameter Output.
4. Transfer the processed output value to the actuator via a digital or analog CPU output.
Proceed as follows to use the digital output value:
1. Select the entry "Output_PWM" in the drop-down list "Output".
2. Select "Instruction".
3. Enter the address of the digital output.
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Function Manual, 03/2017, A5E35300227-AC
PID control