Siemens Simatic S7-1500

Instructions
9.4 PID basic functions
PID control
458 Function Manual, 03/2017, A5E35300227-AC
9.4.2.4
Input parameters CONT_S
Table 9- 15 Input parameters CONT_S
Parameters
Data
type
Default
Description
COM_RST BOOL FALSE The block has an initialization routine that is processed when the "Restart" input
is set.
LMNR_HS BOOL FALSE The signal "Control valve at high endstop" is interconnected at the input "High
endstop signal of position feedback". LMNR_HS=TRUE means: The control valve
is at high endstop.
LMNR_LS BOOL FALSE The signal "Control valve at low endstop" is interconnected on the input "Low
endstop signal of position feedback". LMNR_LS=TRUE means The control valve
is at low endstop.
LMNS_ON BOOL FALSE Manipulated value signal processing is switched to manual mode at the "Enable
manual mode of manipulated signal".
LMNUP BOOL FALSE
The output signal QLMNUP is operated in manual mode of the manipulated value
signals at the input "Manipulated value signal up".
LMNDN BOOL FALSE
The output signal QLMNDN is operated in manual mode of the manipulated value
signals at the input "Manipulated value signal down"
PVPER_ON BOOL FALSE If the process value is to be read from the I/O then the input PV_PER must be
interconnected with the I/O and the input "Enable process value I/O" must be set.
CYCLE TIME T#1s The time between block calls must be constant. The "Sampling time" input speci-
fies the time between block calls.
CYCLE >= 1ms
SP_INT REAL 0.0 The input "Internal setpoint" is used to specify a setpoint.
Permissible are values from -100 to 100 % or a physical variable
1)
.
PV_IN REAL 0.0
At the "Process value input" you can assign parameters to a commissioning value
or you can interconnect an external process value in floating-point format.
Permissible are values from -100 to 100 % or a physical variable
1)
.
PV_PER WORD W#16#0000 The process value in I/O format is interconnected with the controller at the "Pro-
cess value I/O" input.
GAIN
REAL
2.0
The "Proportional gain" input specifies controller amplification.
TI TIME T#20s The "Integration time" input determines the time response of the integral action.
TI >= CYCLE
DEADB_W REAL 1.0 A dead band is applied to the system deviation. The "Dead band width" input
determines the size of the dead band.
Permissible are values from 0 to 100 % or a physical variable
1)
.
PV_FAC REAL 1.0 The "Process value factor" input is multiplied by the process value. The input is
used to scale the process value range.
PV_OFF REAL 0.0 The input "Process value offset" is added to the process value. The input is used
to scale the process value range.
PULSE_TM TIME T#3s You can assign a minimum pulse time at the parameter "Minimum pulse time".
PULSE_TM >= CYCLE
BREAK_TM TIME T#3s You can assign a minimum break time at the parameter "Minimum break time".
BREAK_TM >= CYCLE