Example 5 - Cascade control of a boiler drum level - basic
Steam
Steam Drum
LT 1
Revision 11
2/07
FAIL
Feedwater Flow
Figure 75 Cascade control of a boiler drum level - basic
HC900 Hybrid Control Designer Function Block Reference Guide
FAIL
FT 2
M
Function Blocks
PID Function Block
Note: All physical
connections are by
I/O cards
291