Honeywell HC900 - Figure 73 Cascade Control Example

Function Blocks
PID Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 289
2/07
Example 3 - Cascade control
The Cascade loop uses 2 PID blocks with the Back Calculation pin of the secondary connected to the
primary loop. This transfers values back to the primary loop to adjust the PID for changes due to manual
control.
Figure 73 Cascade control example