Siemens Simatic S7-1500

Using PID_Temp
6.7 Simulating PID_Temp with PLCSIM
PID control
206 Function Manual, 03/2017, A5E35300227-AC
6.7
Simulating PID_Temp with PLCSIM
Note
Simulation with PLCSIM
The simulation of PID_Temp with PLCSIM for CPU S7
-1200 is not supported.
PID_TEMP can be simulated only for CPU S7
-1500 with PLCSIM.
For the simulation with PLCSIM, the time behavior of the
simulated PLC is not exactly
identical to that of a "real" PLC. The actual cycle clock of a cyclic interrupt OB can have
larger fluctuations with a simulated PLC than with "real" PLCs.
In the standard configuration, PID_Temp determines the time between cal
ls automatically
and monitors them for fluctuations.
For the simulation of PID_Temp with PLCSIM, for example, a sampling time error
(ErrorBits
= DW#16#00000800) can therefore be detected.
This results in ongoing tuning being aborted.
The response in autom
atic mode depends on the value of the ActivateRecoverMode tag.
To prevent this from happening, you should configure PID_Temp for simulation with PLCSIM
as follows:
•
CycleTime.EnEstimation = FALSE
•
CycleTime.EnMonitoring = FALSE
•
CycleTime.Value: Assign the cycle clock of the calling cyclic interrupt OB in seconds to
this tag.