Output Parameters Cont_C - Siemens SIMATIC S7-1200 Function Manual

Instructions
9.4 PID basic functions
Parameters Data
type
LMN_HLM REAL
LMN_LLM REAL
PV_FAC REAL
PV_OFF REAL
LMN_FAC REAL
LMN_OFF REAL
I_ITLVAL REAL
DISV REAL
1) Parameters in the setpoint and process value branches with the same unit
2) Parameters in the manipulated value branch with the same unit
9.4.1.5

Output parameters CONT_C

Table 9- 14 Output parameters CONT_C
Parameter Data
type
LMN REAL
LMN_PER WORD
QLMN_HLM BOOL
QLMN_LLM BOOL
LMN_P REAL
LMN_I REAL
LMN_D REAL
PV REAL
ER REAL
454
Default Description
100.0 The manipulated value is always restricted to a high limit and low limit. The "High
limit of manipulated value" input specifies the high limit.
Permissible are real values starting at LMN_LLM or a physical variable 2).
0.0 The manipulated value is always restricted to a high limit and low limit. The "Low
limit of manipulated value" input specifies the low limit.
Permissible are real values up to LMN_HLM or a physical variable 2).
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.
1.0 The "Manipulated value factor" input is multiplied with the manipulated value. The
input is used to scale the manipulated value range.
0.0 The input "Manipulated value offset" is added to the process value. The input is
used to scale the manipulated value range.
0.0 The output of the integral action can be set at the I_ITL_ON input. The initialization
value is a pplied to the input "Initialization value of t he I-action."
Permissible are values of -100.0 to 100.0 (%) or a physical variable 2).
0.0 For feedforward control, the disturbance variable is interconnected to the "Disturb-
ance variable" input.
Permissible are values of -100.0 to 100.0 (%) or a physical variable 2).
Default Description
0.0 The effective "Manipulated value" is output in f loating point format at the "Manipu-
lated v alue" output.
W#16#000 The manipulated value in I/O format is interconnected on the input "Manipulated
0 value I/O" with the controller.
FALSE The manipulated value is always restricted to a high limit and low limit. The output
"High l imit of manipulated value reached" i ndicates that the high limit has been
r eached.
FALSE The manipulated value is always restricted to a high limit and low limit. The output
"Low l imit of manipulated value reached" i ndicates that the low limit has been
r eached.
0.0 The "P-action" output contains the proportional action of the manipulated variable.
0.0 The "I-action" output contains the integral action of the manipulated variable.
0.0 The "D-action" output contains the derivative action of the manipulated variable.
0.0 The effective process value is output at the "Process value" output.
0.0 The effective system deviation is output at the "Error signal" output.
Function Manual, 03/2017, A5E35300227-AC
PID control