Horner APG QX751 OCS - Manual (Page 70)

CH. 13 MAN0890-02-EN
August 20, 2009 Page 70 of 96 ECN # 979
13.2.1 Indications the battery needs replacing
The QX751monitors the battery at power-up and run-time to provide the following indications
when the battery is low, failed or missing.
• At power-up, an error message is displayed for 2 second after the self-test indicating
the low or missing battery.
• The
Ok status is reset and the Battery indicator under the system menu diagnostic
sub-menu is set to WARNING.
• OCS register %SR55.13 is set.
If the optional controller pop-up status is enabled when the QX751detects battery failure, a pop-
up status dialog is displayed on the current screen to alert the operator of the Ok status change.
The operator can then invoke the system menu diagnostic sub-menu to determine the cause of
the loss of Ok status. Alternately, the screen designer can also place a graphic object or audible
indicator (through ladder logic) in the application (referenced to OCS register %SR55.13) to alert
the operator of battery failure.
It is also suggested that the system menu diagnostic sub-menu battery indicator be checked on a
regular basis to verify its operation.
13.2.2 Battery Replacement
The QX751uses a replaceable coin lithium battery available as Horner APG part number
BAT00011.
Below are the steps to replace the battery.
1. It is strongly recommended that the user program and any data stored in retentive
memory be backed up using Cscape’s upload function or the removable media
(CompactFlash) save program function before starting this procedure.
The QX751 maintains power on battery-backed retentive memory for 3
minutes after the unit is powered off. If the battery change procedure
exceeds that time, the application and its data will be lost.
2. Disconnect all power from the QX751 unit including I/O power.
3. Locate the battery access door (Fig. 13.1) which is under the optional BP41 or BP43
mounting position. If a BP41 or BP43 is installed the BP must be removed before
changing out the battery.
Warning: Disposal of lithium batteries must be done in accordance with federal, state, and local
regulations . Be sure to consult with the appropriate regulatory agencies before disposing of batteries. In addition, do not
recharge, disassemble, heat or incinerate lithium batteries.
Warning: Do not make substitutions for the battery. Be sure to only use the authorized part number
to replace the battery.
Warning: Lithium Batteries may explode or catch fire if mistreated!
Do not recharge, disassemble, heat above 100 degrees C (212 degrees F) incinerate, or puncture.