Omron CS1W-LC001 Operation Manual page 27

Outline
Temperature Control of Kettle Reboiler (cascade control)
Analog Input Analog
Unit Output Unit
Temperature
Cold water
Drain
Boiler Drum Level Control (with cascade feedforward control function)
Input Unit
Steam flow rate
Level
Loop Control
PID1
PV 1
MV 1
RSP1
PID2
PV 2
MV 2
Liquid-vapor
separation
converter
Temperature
Temperature
Conversion
Loop Control Unit
Analog Analog
Output Unit
PV 1
PID1
PV 2
PID2
Steam
MV2
Flow rate
Water supply
Section
CPU Unit
Vapor
CPU Unit
MV 1
+
RSP
MV 2
1-1
7