Siemens SIMATIC S7-1200 - Page 290

Instructions
9.1 PID_Compact
PID control
290 Function Manual, 03/2017, A5E35300227-AC
Tag
Data type
Default
Description
sPid_Cmpt.r_Sp_Hlm REAL +3.402822e+
38
High limit of setpoint
If you configure sPid_Cmpt.r_Sp_Hlm outside the
process value limits, the configured process value
absolute high limit is used as the setpoint high limit.
If you set sPid_Cmpt.r_Sp_Hlm within the process
value limits, this value is used as the setpoint high
limit.
sPid_Cmpt.r_Sp_Llm REAL -
3.402822e+3
8
Low limit of the setpoint
If you set sPid_Cmpt.r_Sp_Llm outside the process
value limits, the configured process value absolute
low limit is used as the setpoint low limit.
If you set sPid_Cmpt.r_Sp_Llm within the process
value limits, this value is used as the setpoint low
limit.
sPid_Cmpt.r_Pv_Norm_IN_1 REAL 0.0 Scaling Input_PER low
Input_PER is converted to percent based on the two
value pairs r_Pv_Norm_OUT_1, r_Pv_Norm_IN_1 and
r_Pv_Norm_OUT_2, r_Pv_Norm_IN_2 from the
sPid_Cmpt structure.
sPid_Cmpt.r_Pv_Norm_IN_2 REAL 27648.0 Scaling Input_PER high
Input_PER is converted to percent based on the two
value pairs r_Pv_Norm_OUT_1, r_Pv_Norm_IN_1 and
r_Pv_Norm_OUT_2, r_Pv_Norm_IN_2 from the
sPid_Cmpt structure.
sPid_Cmpt.r_Pv_Norm_OUT_1 REAL 0.0 Scaled low process value
Input_PER is converted to percent based on the two
value pairs r_Pv_Norm_OUT_1, r_Pv_Norm_IN_1 and
r_Pv_Norm_OUT_2, r_Pv_Norm_IN_2 from the
sPid_Cmpt structure.
sPid_Cmpt.r_Pv_Norm_OUT_2 REAL 100.0 Scaled high process value
Input_PER is converted to percent based on the two
value pairs r_Pv_Norm_OUT_1, r_Pv_Norm_IN_1 and
r_Pv_Norm_OUT_2, r_Pv_Norm_IN_2 from the
sPid_Cmpt structure.
sPid_Cmpt.r_Lmn_Hlm
REAL
100.0
Output value high limit for output parameter "Output"
sPid_Cmpt.r_Lmn_Llm
REAL
0.0
Low output value limit for output parameter "Output"
sPid_Cmpt.b_Input_PER_On BOOL TRUE If b_Input_PER_On = TRUE, then parameter In-
put_PER is used. If b_Input_PER_On = FALSE, then
parameter Input is used.
sPid_Cmpt.b_LoadBackUp BOOL FALSE Activate the back-up parameter set. If an optimization
has failed, you can reactivate the previous PID pa-
rameters by setting this bit.
sPid_Cmpt.b_InvCtrl BOOL FALSE Invert control logic
With b_InvCtrl = TRUE, an increasing control devia-
tion causes a reduction in the output value.
sPid_Cmpt.r_Lmn_Pwm_PPTm REAL 0.0 The minimum ON time of the pulse width modulation
in seconds is rounded to
r_Lmn_Pwm_PPTm = r_Cycle or
r_Lmn_Pwm_PPTm = n*r_Cycle