Technology instructions
10.2 PID control
S7-1200 Programmable controller
616 System Manual, V4.2, 09/2016, A5E02486680-AK
Figure 10-7 PID_Temp_Cascade_Operation_Block_Diagram
You can cascade temperature PID controllers to process more than one temperature that
depend on the same actuator.
You must call cascaded PID controllers in the same OB cycle. First, you must call the
master, then, the next slave(s) in the control signal flow, and finally on to the last slave in the
cascade. The PID_Temp instruction does not make an automatic check of call order.
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