Micromod RetroPAK: SLC Configuration Manual - Manual (Page 87)

Pre-configured Single Loop PID Control
GENERAL DESCRIPTION
The advanced PID controller function code implements a proportional integral derivative
controller.
This control strategy has a loop compounds (SINGLE LOOP CONTROL) with PID
loops with local setpoint, I/O and other function blocks.
UTILIZATION
The loop compound has the function code compound FC156 – PID internally. This is
PID with Local SP and uses a PID block, PAD (Process Alarm Display) blocks and a
variety of other blocks to perform a full-pledged PID with PV and Local Setpoint. The
PID is advanced with feed-forward control, bump-less transfers and other features.
Load the loop compound at the top level (where the IF, DIF, SE and ST blocks are
located) of the function block diagram.
The built-in input 1 (AIN1) and built-in output 1 (AOUT1) are used in the loop.
Figure P1.1.
PID with Local SP
P1- 1