Micromod RetroPAK: SLC Configuration Manual - Manual (Page 187)

Pre-configured PID Ratio with Remote SP
GENERAL DESCRIPTION
The advanced PID controller function code implements a proportional integral derivative
controller.
This control strategy has a loop compound that performs with PID with remote setpoint
and ratio, I/O and other function blocks.
UTILIZATION
Load this compound at the top level (where the IF, DIF, SE and ST blocks are located) of
the function block diagram.
Internally the loop compound has the compound Function Code 156 – Cascade.
The compound uses a PID block, PAD (Process Alarm Display) blocks and a variety of
other blocks to perform a full-pledged Cascade loop (master – slave). The PID is
advanced with feed-forward control, bump-less transfers and other features.
Figure P6.1.
PID Ratio with
Remote SP
EXPLANATION
Configuration with this compound requires understanding of the compound and how the
PID block is configured in the MOD 30ML/Modcell controllers. Following is the
P6- 1