Siemens SIMATIC S7-1200 Function Manual page 360

Instructions
9.2 PID_3Step
Tag
Retain.CtrlParams.Td
Retain.CtrlParams.TdFiltRatio
Retain.CtrlParams.PWeighting REAL
Retain.CtrlParams.DWeighting REAL
Retain.CtrlParams.Cycle
Retain.CtrlParams.Input-
DeadBand
Note
Change the tags listed in this table in "Inactive" mode to prevent malfunction of the PID
controller. "Inactive" mode is forced by setting the "Retain.Mode" tag to "0".
See also
Parameter State and Retain.Mode V1 (Page 361)
Tag ActivateRecoverMode V1 (Page 372)
Downloading technology objects to device (Page 44)
360
Data type Default Description
REAL 0.0
•
•
Td is retentive.
REAL 0.0 Active derivative delay coefficient
TdFiltRatio is retentive.
0.0 Active proportional action weighting
PWeighting is retentive.
0.0 Active derivative action weighting
DWeighting is retentive.
REAL 1.0 Active sampling time of PID algorithm in seconds, rounded to an
integer multiple of the cycle time of the calling OB.
Cycle is retentive.
REAL 0.0 Dead zone width of the control deviation
InputDeadBand is retentive.
Td > 0.0: Active derivative action time
Td = 0.0: Derivative action is deactivated
Function Manual, 03/2017, A5E35300227-AC
PID control