Input Parameters Cont_S - Siemens SIMATIC S7-1200 Function Manual

Instructions
9.4 PID basic functions
9.4.2.4

Input parameters CONT_S

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