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Major Alarm Event
Assignments
40
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• If you enter the command with the
always applies the the
To determine which radio is the standby, use the
which indicates which radio (
opposite slot is
INACTIVE
AMASK [0000 0000–FFFF FFFF]
Table 10
and
Table 11 on Page 39
sifications. It is possible to reassign alarm outputs (illustrated in
Figure 19
on
Page
22) to a different category, and change which alarm
events trigger an automatic switchover in redundant master stations.
However, this should be done rarely, if ever.
The
command and
AMASK
and minor alarm events, respectively, changing the alarm output relay
status and switchover conditions. These commands can be used to tailor
a radio's alarm response. For example, a major alarm at a redundant
master station causes switch-over to the other transceiver board. By
re-configuring a minor alarm as a major alarm, you can force a
switch-over at the occurrence of a (formerly) minor alarm condition.
Reclassifying alarms does not disable alarm notification. The front
panel
LED illuminates, the alarm event is logged, and the
ALARM
and
commands show the alarm status.
STAT
Entering the
command alone displays the current setting of
AMASK
major alarm events in hexadecimal format. Entering the
mand followed by an eight-digit hexadecimal number reassigns each of
the 32 possible alarm events as enabled or disabled, with respect to
major alarm output relay status and switchover criteria.
The hex value for the mask corresponds to the hex value for the
command (see the
ALARM
different major or minor alarm. The most significant 16 bits represent
specific major alarms and the least significant 16 bits represent specific
minor alarms. All major and minor alarms are "set" as the default
AMASK.
NOTE: GE MDS does not use all bits. Some bits are reserved for
future use.
The default AMASK is FFFF FFFF, which signals an alarm on the data
port pin 25 for all major and minor alarms. To disable the alarm signal
on pin 25 for a specific alarm, reset the bit associated to the specific
alarm and convert back to hex.
vide the hex and binary values for each alarm code.
MDS 4790/9790 Series I/O Guide
parameter, the response
[B]
radio.
B
SHOW RADIO
or
) is
. It also indicates if the
A
B
ACTIVE
or
.
NOT EQUIPPED
Alarm Masks
A
B
list the major and minor alarm clas-
command
(Page
NMASK
command description). Each bit represents a
Table 10
and
Table 11 on Page 39
MDS 05-3438A01, Rev. F
command,
screen,
Page 75
49) reclassify major
ALARM
com-
AMASK
ALARM
pro-
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