SCOM-100, User guide 41
4.6.1 ON/OFF and PID control
Up to four ON/OFF or PID control function blocks are
available. Each block uses an analog input for measuring
the process value and a digital output for control.
Function block configuration
1250,id,m,n,m1,n1,sp,g,it,dt,ct,h
1250: Command ID.
id: Function block ID (1-4).
m: Module number (0 for SCOM-100 main
unit, 1-4 for AI-4 expansion units).
n: Input number (1-2 for SCOM-100 main
unit, 1-4 for AI-4 expansion units).
m1: Module number (0 for SCOM-100 main
unit, 1-8 for DI-42 I/O expansion units).
n1: Output number (1-4 for SCOM-100
main unit, 1-2 for DI-42 I/O expansion
units).
sp: Set point value in the range of the
analog input scale.
g: ‘Gain’ value (P) between 1 and 100%.
The block function depends on the
‘Gain’ value: A zero value selects the
ON/OFF control function. A non zero
value selects the PID function.
it: ‘Integral time’ (I) value between 1-1000
sec. A zero value disables the integral
part (not relevant for ON/OFF control).