Parameter Declaration Data Type Description
LMN_P OUTPUT REAL PROPORTIONALITY COMPONENT
n The LMN_P output contains the proportional com-
ponent of the manipulated variable.
n Default: 0.0
LMN_I OUTPUT REAL INTEGRAL COMPONENT
n The LMN_I output contains the integral component
of the manipulated value.
n Default: 0.0
LMN_D OUTPUT REAL DERIVATIVE COMPONENT
n The LMN_D output contains the derivative compo-
nent of the manipulated value..
n Default: 0.0
PV OUTPUT REAL PROCESS VARIABLE
n The effective process variable is output at the PV
output.
n Default: 0.0
ER OUTPUT REAL ERROR SIGNAL
n The effective error is output at the ER output.
n Default: 0.0
1) Parameters in the setpoint and process variable branches with the same unit
2) Parameters in the manipulated value branch with the same unit
You can use the controller as a PID fixed setpoint controller or in multi-loop controls as a
cascade, blending or ratio controller. The functions of the controller are based on the PID
control algorithm of the sampling controller with an analog signal, if necessary extended
by including a pulse generator stage to generate pulse duration modulated output signals
for two or three step controllers with proportional actuators.
Apart from the functions in the setpoint and process value branches, the FB implements a
complete PID controller with continuous manipulated variable output and the option of
influencing the manipulated value manually.
The setpoint is entered in floating-point format at the SP_INT input.
The process variable can be input in the peripheral (I/O) or floating-point format. The
CRP_IN function converts the PV_PER peripheral value to a floating-point format of
-100 to +100 % according to the following formula:
The PV_NORM function normalizes the output of CRP_IN according to the following for-
mula:
PV_FAC has a default of 1 and PV_OFF a default of 0.
Application
Setpoint Branch
Process Variable Branch
VIPA SPEED7
Standard
PID Control > FB 41 - CONT_C - Continuous control
HB00 | OPL_SP7 | Operation list | en | 18-30 839
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