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2620A, 2625A
Users Manual
4-28
Table 4-8. Command and Query Reference (cont)
ALARMS? Active Alarms Query
Returns alarm status for the indicated channel(s). The value returned
represents data from the most recent scan. The most recent scan is the
scan in progress or, if scanning is not in progress, the last completed
scan.
ALARMS? <channel>
<channel> = (0 .. 20)
If the channel specification field is left blank, values for all defined
channels are returned (values for channels defined as OFF are not
included.) An Execution Error results if a request is made for a channel
defined as OFF, the channel specified is invalid, no scan measurements
have been made, or review values have been cleared.
Data is returned as comma-separated integer values, indicating which
limits were in alarm when last scanned. The returned values are
interpreted as follows:
0 neither limit is in alarm and/or alarm(s) not defined
1 Limit "1" in alarm
2 Limit "2" in alarm
3 Limit "1" and Limit "2" in alarm
If measurements are not active, the last known value is returned. The
value 0 is returned for measured channels that do not have alarms
defined.
For alarm status of all defined channels (no channel specification made),
undefined (OFF) channels are not included. For each defined channel,
an integer value (0, 1, 2, or 3) is returned. Commas separate integers for
different channels, and no blank spaces are included. For example, if
channel 1 has no alarm, channel 12 has Limit "2" in alarm, channel 13
has Limit "1" and Limit "2" in alarm, and channel 14 has Limit "1" in
alarm, the return is "0,2,3,1".
ALARM_ASSOC Associate Alarm Output
For the indicated channel and alarm limit, associate the given digital
output line.
ALARM_ASSOC <channel>,<limit_num>,<DO_line>
<channel> = (4 .. 20)
<limit_num> = 1 2
<DO_line> = (0 .. 7)
Any other values or use of an invalid channel cause an Execution Error
to be generated. If an association already exists for the specified channel
and limit, executing this command revises the association. When
switching alarm associations, the output being left (switched away from)
is set to a high (non-alarm) state. To set multiple channels to a single
DO_line, issue this command for each association to be made.