F73 – Alarm Control / Status
Use Clear Alarm Latch after troubleshooting or fixing the cause of an alarm so new alarms
can be distinguished from previous ones.
About Alarm Latch: The Alarm Latch shows if an indicator has triggered an alarm at any time
since the last time the Alarm Latch was cleared, even if the indicator is presently “Locked” or
“OK”. This feature is useful for finding and troubleshooting transient alarms. F73 indicators
must be enabled in order for alarms to occur and be latched. The alarm latch does not record
the occurrence of a fault or unlocked state if the indicator is disabled. The Alarm Latch is
visible as an asterisk (“*”) when viewing F73 on the front panel display. For example:
GPS OK *
ALARM ENABLED
Save Changes
Yes: Applies all user-entered changes to the F73 configuration.
No: Clears all user-entered changes and exits the function.
Keypad
Note: The Alarm Latch asterisk is not the same as the “reference source unavailable” aster-
isk that can sometimes be seen on the STATUS display.
Command Line
To query the status of F73, enter:
F73<CR>
F73 responds:
F73<SP>S<STATUS>P<SP><123456789ABCD><CR><LF>
where:
F =
ASCII character F
73 =
function number.
<SP> =
ASCII space character.
S =
ASCII character S, Status delimiter
<STATUS> =
'L' Locked
'U' Unlocked
098-00116-000 Rev. A............................... Page 99 of 221
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