Siemens SIMATIC S7-1200

Instructions
9.2 PID_3Step
PID control
Function Manual, 03/2017, A5E35300227-AC
329
Tag
Data type
Default
Description
Retain.CtrlParams.PWeighting REAL 1.0 Active proportional action weighting
The proportional action may weaken with changes to the
setpoint.
Values from 0.0 to 1.0 are applicable.
• 1.0: Proportional action for setpoint change is fully effec-
tive
• 0.0: Proportional action for setpoint change is not effec-
tive
The proportional action is always fully effective when the
process value is changed.
PWeighting is retentive.
Retain.CtrlParams.DWeighting REAL 1.0 Active derivative action weighting
The derivative action may weaken with changes to the set-
point.
Values from 0.0 to 1.0 are applicable.
• 1.0: Derivative action is fully effective upon setpoint
change
• 0.0: Derivative action is not effective upon setpoint
change
The derivative action is always fully effective when the pro-
cess value is changed.
DWeighting is retentive.
Retain.CtrlParams.Cycle 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.
Retain.CtrlParams.Input-
DeadBand
REAL 0.0 Dead band width of the control deviation
InputDeadBand is retentive.
Note
Change the tags listed in this table in "Inactive" mode to prevent malfunction of the PID
controller.
See also
Parameters State and Mode V2 (Page 330)
Tag ActivateRecoverMode V2 (Page 338)
Downloading technology objects to device (Page 44)