Pid_Temp Warning Tag - Siemens SIMATIC S7-1200 Function Manual

Instructions
9.3 PID_Temp
9.3.4.10

PID_Temp Warning tag

If several warnings are pending simultaneously, the values of the Warning tag are displayed
with binary addition. If the warning 0000003h is displayed, for example, the warnings
0000001h and 0000002h are pending simultaneously.
Warning Description
(DW#16#....)
0000000 No warning pending.
0000001 The point of inflection was not found during pretuning.
0000004 The setpoint was limited to the configured limits.
0000008 Not all the necessary controlled system properties were defined for the selected method of calculation.
Instead, the PID parameters were calculated using the method TIR.TuneRuleHeat = 3 or
TIR.TuneRuleCool = 3.
0000010 The operating mode could not be changed because Reset = TRUE or ManualEnable = TRUE.
0000020 The cycle time of the calling OB limits the sampling time of the PID algorithm.
Improve results by using shorter OB cycle times.
0000040 The process value exceeded one of its warning limits.
0000080 Invalid value at Mode. The operating mode is not switched.
0000100 The manual value was limited to the limits of the PID output value.
0000200 The specified rule for tuning is not supported. No PID parameters are calculated.
0001000 The substitute output value cannot be reached because it is outside the output value limits.
0004000 The specified selection of the output value for heating and/or cooling is not supported.
Only the output OutputHeat or OutputCool is used.
0008000 Invalid value at PIDSelfTune.SUT.AdaptDelayTime. The default value 0 is used.
0010000 Invalid value at PIDSelfTune.SUT.CoolingMode. The default value 0 is used.
0020000 The activation of cooling (Config.ActivateCooling tag) is not supported by the controller that is used as
master (Config.Cascade.IsMaster tag). PID_Temp works as heating controller.
Set the Config.ActivateCooling tag to FALSE.
0040000 Invalid value at Retain.CtrlParams.Heat.Gain, Retain.CtrlParams.Cool.Gain oder Config.CoolFactor.
PID_Temp supports only positive values for proportional gain (heating and cooling) and cooling factor.
Automatic mode remains active with PID output value 0.0. The integral component is stopped.
The following warnings are deleted as soon as the cause has been remedied or you repeat
the action with valid parameters:
● 0000001h
● 0000004h
● 0000008h
● 0000040h
● 0000100h
All other warnings are cleared with a rising edge at Reset or ErrorAck.
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Function Manual, 03/2017, A5E35300227-AC
PID control