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High process alarm setpoint, High process alarm type, Alarm delay – Watlow CAS User Manual

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Setup

CAS User’s Guide 59

Alarm Delay

You can set the CAS to delay normal alarm detection and alarm
reporting. There are two kinds of alarm delay:

Startup alarm delay delays detection of process alarms (but not failed

sensor alarms) for all channels for a time period you set in the Setup
Global Parameters main menu.

Channel alarm delay delays failed sensor alarms and process alarms

for one channel until the alarm condition is continuously present for
longer than the channel alarm delay time you set.

NOTE

Failed sensor alarms are detected at startup. They are affected by
the channel alarm delay, not the startup alarm delay time.

High Process Alarm Setpoint

This menu lets you select the setpoint (temperature or other value within
the scaled sensor range) at which the high process alarm activates. The
high process alarm activates when the process variable (PV) goes above
the high process setpoint. It deactivates when the PV goes below the
high process setpoint minus the deadband value, if you have set a
deadband value.

Selectable values: Any point within the scaled sensor range

High Process Alarm Type

This menu lets you turn off the high process alarm or set it to one of the
alarm functions. (See the previous description for an explanation of
these choices).

Selectable values: Off, Latched, Unlatched

CHANNEL PROCESS UNITS

CHANNEL NAME ALARM STATUS

01 HI PROC ALARM
SETPT ? 1000

°

F

CHANNEL PROCESS UNITS

CHANNEL NAME ALARM STATUS

01 HI PROC ALARM
TYPE ? OFF