Instructions
9.3 PID_Temp
PID control
Function Manual, 03/2017, A5E35300227-AC
389
Input parameters of PID_Temp
Setpoint REAL 0.0 Setpoint of the PID controller in automatic mode
Valid range of values:
Config.SetpointUpperLimit ≥ Setpoint ≥ Config.SetpointLowerLimit
Config.InputUpperLimit ≥ Setpoint ≥ Config.InputLowerLimit
Input REAL 0.0 A tag of the user program is used as source for the process value.
If you are using the Input parameter, Config.InputPerOn = FALSE must be
Input_PER INT 0 An analog input is used as the source of the process value.
If you are using the Input_PER parameter, Config.InputPerOn = TRUE must
Disturbance variable or precontrol value
Manual-
Enable
BOOL FALSE
• A FALSE -> TRUE edge activates "Manual mode", whileState = 4, Mode
remains unchanged.
As long as ManualEnable = TRUE, you cannot change the operating
mode via a rising edge at ModeActivate or use the commissioning dialog.
• A TRUE ->
FALSE edge activates the operating mode that is specified by
Mode.
We recommend that you change the operating mode using Mode and
ManualValue REAL 0.0 Manual value
This value is used in manual mode as PID output value (PidOutputSum).
The values at the outputs for heating and cooling resulting from this manual
value are the result of the configured output scaling (structures Con-
fig.Output.Heat and Config.Output.Cool).
For controllers with activated cooling output (Config.ActivateCooling =
TRUE), define:
• a positive manual value to output the value at the outputs for heating
• a negative manual value to output the value at the outputs for cooling
The permitted value range is determined by the configuration.
• Cooling output deactivated (Config.ActivateCooling = FALSE):
Config.Output.Heat.PidUpperLimit ≥ ManualValue ≥ Con-
fig.Output.Heat.PidLowerLimit
• Cooling output activated (Config.ActivateCooling = TRUE):
Config.Output.Heat.PidUpperLimit ≥ ManualValue ≥ Con-
fig.Output.Cool.PidLowerLimit
ErrorAck BOOL FALSE
• FALSE -> TRUE edge
ErrorBits and Warning are reset.
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