Static Variables Tcont_Cp - Siemens SIMATIC S7-1200 Function Manual
Pid control
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9.4.4.8
Static variables TCONT_CP
Table 9- 22
Static variables TCONT_CP
Parameters
Address Data type
DEADB_W
44.0
I_ITLVAL
48.0
LMN_HLM
52.0
LMN_LLM
56.0
PV_FAC
60.0
PV_OFFS
64.0
LMN_FAC
68.0
LMN_OFFS
72.0
PER_TM
76.0
P_B_TM
80.0
TUN_DLMN
84.0
PID control
Function Manual, 03/2017, A5E35300227-AC
Default
Description
REAL
0.0
A deadband is applied to the control deviation. The "Deadband width"
input determines the size of the deadband.
The valid values depend on the sensors used.
REAL
0.0
The output of the integrator can be set at the I_ITL_ON input. The ini-
tialization value is applied to the "Initialization value of the I-action"
input. During a restart COM_RST = TRUE, the I-action is set to the
initialization value.
Values from -100 to 100 % are permitted.
REAL
100.0
The output value is always restricted to a high limit and low limit. The
"Manipulated value high limit" input specifies the high limit.
LMN_HLM > LMN_LLM
REAL
0.0
The output value is always restricted to a high limit and low limit. The
"Manipulated value low limit" input specifies the low limit.
LMN_LLM < LMN_HLM
REAL
1.0
The "Process value factor" input is multiplied by the "Process value
I/O". The input is used to scale the process value range.
REAL
0.0
The "Process value offset" input is added to the "Process value I/O".
The input is used to scale the process value range.
REAL
1.0
The "Output value factor" input is multiplied with the output value. The
input is used to scale the output value range.
REAL
0.0
The "Output value offset" input is added to the output value. The input
is used to scale the output value range.
REAL
1.0 s
The period duration of the pulse width modulation is entered at the
PER_TM parameter. The relationship of the period duration to the sam-
pling time of the pulse shaper determines the accuracy of the pulse
width modulation.
PER_TM ≥ CYCLE
REAL
0.02 s
You can assign a minimum pulse or break time at the parameter "Mini-
mum pulse/break time". P_B_TM is internally limited to > CYCLE_P.
REAL
20.0
Process excitation for controller tuning results from a output value step
change at TUN_DLMN.
Values from -100 to 100 % are permitted.
Instructions
9.4 PID basic functions
489
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