9. Diagnostics and Fault Clearance
• DOK-CONTRL-DDC+MDD+DLC-ANW1-EN-E1,44 • 01.97
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9.5.
Replacing the Battery
The parameters and the user program are both stored on the DLC in RAM
memory with battery back up.
The 3.6 volt lithium battery can generally be used for and has a lifespan of
approximately ten years.
Monitoring the battery
The battery is tested each time the DLC is switched on and then every four
hours thereafter during operations. Once the power of the battery has rea-
ched the stage where only approximately 30 days of use remain, then the
message "battery empty" will appear on the CTA display each time the
power supply is switched on. Output „fault NOT“ of the DLC remains at „0“.
If the error message is cancelled, then it will still appear every ten minutes.
Output „fault NOT“ remains at „1“. The DLC can still function.
Replacing the battery
With power off, pull the DLC plug-in module out of the drive controller.
Caution
If the connections at connector X32 on the DLC are re-plugged from old to
new within 30 seconds, then the data will not be lost. In conclusion, fix the
new battery on the DLC plug-in module tightly into place.
Source of danger:
Data loss
Possible consequences:
Extensive machine downtimes
How to avoid:
Parameter and user program should be secured on
an external data carrier or in hardcopy form.