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Heat or cool output limit, Heat or cool output limit time, Heat or cool output override – Watlow CLS User Manual

Page 93

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Setup

CLS User’s Guide 85

Heat or Cool Output Limit

Use this menu to limit the maximum PID control output for a loop's heat
and cool outputs. This limit may be continuous, or it may be in effect for
a specified number of seconds (see Output Limit Time below). If you
choose a timed limit, the output limit restarts when the controller
powers up and when the output goes from Manual to Automatic control
(via the front panel, when the controller changes jobs, or from
ANASOFT). The output limit only affects loops under automatic
control. It does not affect loops under manual control.

Selectable range: 0-100%.

Heat or Cool Output Limit Time

Use this menu to set a time limit for the output limit.

Selectable values: 1-999 seconds (1 second to over 16 minutes), or to
CONT (continuous).

Heat or Cool Output Override

Use this menu to set an output override percentage. (You can configure
a digital input for the output override in the Set up Global Parameters
main menu.) If the current loop is in Automatic mode and a sensor
failure occurs, the loop switches to the output override percentage. If
you change the polarity of the override output to the active state--for
instance, by flipping a “kill switch” you have set up--every loop
switches to the output override percentage you set here.

Selectable range: 0-100%.

LOOP PROCESS UNITS

ALARM SETPOINT STATUS OUT%

01 HEAT OUTPUT
LIMIT ? 100%

LOOP PROCESS UNITS

ALARM SETPOINT STATUS OUT%

03 HEAT OUTPUT
LIMIT TIME ? CONT

LOOP PROCESS UNITS

ALARM SETPOINT STATUS OUT%

03 HEAT OVERRIDE
OUTPUT ? 0%