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Alert messages
These single character messages are sent by the UPS any time there is an
Alert condition. All other responses indicated above are sent by the UPS
only in response to a query or action command.
Character Description
! Line Fail - sent when the UPS goes on-battery, repeated every 30
seconds until low battery condition reached. Sometimes occurs
more than once in the first 30 seconds.
$ Return from line fail - UPS back on line power, only sent if a !
has been sent.
% Low battery - Sent to indicate low battery, but not on SmartUPS
v/s or BackUPS Pro models
+ Return from low battery - Sent when the battery has been
recharged to some level only if a % has been sent previously
? Abnormal condition - sent for conditions such as “shutdown due
to overload” or “shutdown due to low battery capacity”. Also
occurs within 10 minutes of turnon.
= Return from abnormal condition - Sent when the UPS returns
from an abnormal condition where ? was sent, but not a turn-on.
Not implemented on SmartUPS v/s or BackUPS Pro models.
* About to turn off - Sent when the UPS is about to switch off the
load. No commands are processed after this character is sent. Not
implemented on SmartUPS v/s, BackUPS Pro, or 3rd generation
SmartUPS models.
# Replace battery - Sent when the UPS detects that the battery
needs to be replaced. Sent every 5 hours until a new battery test
is run or the UPS is shut off. Not implemented on SmartUPS v/s
or BackUPS Pro models.
& Check alarm register for fault (Measure-UPS) - sent to signal that
temp or humidity out of set limits. Also sent when one of the
contact closures changes states. Sent every 2 minutes, stops when
the alarm conditions are reset. Only sent for alarms enabled with
I. Cause of alarm may be determined with J. Not on SmartUPS
v/s or BackUPS Pro.
— Variable change in EEPROM - Sent whenever any EEPROM vari-
able is changed. Only supported on Matrix UPS and 3rd genera-
tion SmartUPS models.
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