Watlow CLS - Manual (Page 156)

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Appendix B: Enhanced Process Control
Ratio Control Menus
The Ratio control parameters appear under a new menu option, which
follows the Cascade menu:
Answering YES to this prompt will allow you to set up the Ratio control
parameters with loop number 02 as the Ratio loop, which performs the
actual control of the final control element.
Ratio PV Assignment
Selectable Values: You may select from all the loops in the controller
except the loop currently selected (in this example loop 02). Choose
NONE for no Ratio control.
Minimum Setpoint
Selectable Values: From the ratio loop PV minimum reading to the
maximum reading.
Maximum Setpoint
Selectable Values: From the ratio loop PV minimum reading to the
maximum reading.
Control Ratio
Selectable Values: 0.1 to 999.9.
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
SETUP LOOP 02
RATIO CONTROL?
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
02 RATIO CONTROL
MSTR LOOP? NONE
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
02 RATIO CONTROL
MIN SP? 25
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
02 RATIO CONTROL
MAX SP? 25
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
02 RATIO CONTROL
CTRL RATIO? 1.0