Siemens Simatic S7-1500 - Page 291

Instructions
9.1 PID_Compact
PID control
Function Manual, 03/2017, A5E35300227-AC
291
Tag
Data type
Default
Description
sPid_Cmpt.r_Lmn_Pwm_PBTm REAL 0.0
The minimum OFF time of the pulse width modulation
in seconds is rounded to
r_Lmn_Pwm_PBTm = r_Cycle or
r_Lmn_Pwm_PBTm = n*r_Cycle
sPid_Cmpt.r_Pv_Hlm REAL 120.0 High limit of the process value
At the I/O input, the process value can be a maxi-
mum of 18% higher than the standard range (over-
range). An error is no longer reported for a violation
of the "Process value high limit". Only a wire-break
and a short-circuit are recognized and the
PID_Compact switches to "Inactive" mode.
r_Pv_Hlm > r_Pv_Llm
sPid_Cmpt.r_Pv_Llm REAL 0.0 Low limit of the process value
r_Pv_Llm < r_Pv_Hlm
sPid_Cmpt.r_Pv_HWrn REAL +3.402822e+
38
Warning high limit of the process value
If you set r_Pv_HWrn outside the process value lim-
its, the configured process value absolute high limit is
used as the warning high limit.
If you configure r_Pv_HWrn within the process value
limits, this value is used as the warning high limit.
r_Pv_HWrn > r_Pv_LWrn
r_Pv_HWrn ≤ r_Pv_Hlm
sPid_Cmpt.r_Pv_LWrn REAL -
3.402822e+3
8
Warning low limit of the process value
If you set r_Pv_LWrn outside the process value limits,
the configured process value absolute low limit is
used as the warning low limit.
If you configure r_Pv_LWrn within the process value
limits, this value is used as the warning low limit.
r_Pv_LWrn < r_Pv_HWrn
r_Pv_LWrn ≥ r_Pv_LWrn
sPidCalc.i_Ctrl_IOutv
REAL
0.0
Current integral action
sParamCalc.i_Event_SUT INT 0 Variable i_Event_SUT (Page 300) indicates the cur-
rent phase of "pretuning":
sParamCalc.i_Event_TIR INT 0 Variable i_Event_TIR (Page 301) indicates the cur-
rent phase of "fine tuning":
sRet.i_Mode INT 0 The operating mode is changed edge-triggered.
The following operating mode is enabled on a change
to
• i_Mode = 0: "Inactive" mode (controller stop)
• i_Mode = 1: "Pretuning" mode
• i_Mode = 2: "Fine tuning" mode
• i_Mode = 3: "Automatic" mode
• i_Mode = 4: "Manual" mode
i_Mode is retentive.
sRet.r_Ctrl_Gain REAL 1.0 Active proportional gain
Gain is retentive.