Topic: DMD0261
Battery Backup
All Do-more controllers have an onboard battery that maintains the contents of the retentive memory any time the power to the controller is lost. The battery has an expected lifespan of three years; after which the battery will need to be replaced. The battery is a standard CR2032, coin cell battery.
When the controller detects that the battery voltage is too low, and needs to be replaced, the PWR LED will be YELLOW instead of it's normal GREEN color. When Do-more Designer is online with the controller, the system-defined location $BatteryLow will be ON as well.
Make sure to have a current copy of the
Do-more Designer project saved
to Disk before performing this operation.
Power down the system containing the controller.
Remove the controller from the base.
Remove the battery from it's holder that is located on the back of the controller's PWB, in the lower right corner. The battery is removed by pushing on the back of the battery to begin sliding it out of the holder, then pulling it the rest of the way out by the front edge of the battery. Make note of how the battery is aligned in the holder.
Note: The controller has an onboard capacitor that will maintain the retentive memory contents while the battery is being replaced. This capacitor has a two-hour runtime, which should be more than enough to replace the battery.
Insert the new battery into the holder, making sure the alignment is correct.
Reinstall the controller in the base.
Power up the system containing the controller.
Verify that the PWR LED is now GREEN instead of YELLOW and the system-defined location $BatteryLow will be OFF.
See Also:
Changing the Onboard Battery