Micromod MOD: 30ML Operation and Template Setup - Manual (Page 50)

MOD 30ML Multiloop Controller
OPERATION
3-18
It may also be desirable for the set-point of the master to track the master process variable.
This depends on the desirability of permitting the set-point of the master to vary indirectly in
response to changes at the slave controller.
3.12.2 Cascade Operation in Auto
Since the control element (valve, air damper, etc.) is directly manipulated by the slave, the
cascade master is configured to permit only auto mode which simplifies operations by
ensuring that all mode transfers and manual intervention can be accomplished exclusively at
the slave.
Master Controller Slave Controller
Remote slave set-
point tracks master
output.
Local set-point.