Watlow MLS - Manual (Page 107)

Setup
MLS User’s Guide 95
NOTE
All digital outputs are "OR'ed" together (combined).
Therefore you can assign more than one alarm to the
same output number, and that output will be On if any
of those alarms is On.
Alarm Deadband
Use this menu to set an alarm deadband. This deadband value applies to
the high process, low process, high deviation, and low deviation alarms
for the loop you are editing. Use the Alarm Deadband to avoid repeated
alarms as the PV cycles slightly around an alarm value.
Selectable values: The default range is 0 to 255, 25.5, 2.55, .255, or
.0255, depending on how you set up the input menus.
Loop Alarm Delay
Use this menu to set a loop alarm delay. There are two types of alarm
delay: the startup alarm delay and loop alarm delay. Startup alarm delay
(which you can set in the Setup Global Parameters main menu) delays
process alarms (but not failed sensor alarms) for all loops for a specified
time after the controller powers up.
The loop alarm delay, in contrast, is set separately for each loop. It
delays failed sensor and process alarms until the alarm condition has
been continuously present for longer than the alarm delay time. (Failed
sensor alarms are not subject to the startup alarm delay, but they are
affected by the loop's alarm delay during the startup alarm delay
period.)
Selectable range: 0-255 seconds.
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
03 ALARM
DEADBAND ? 2
º F
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
04 ALARM DELAY ?
0 SECONDS