“I cannot emphasize enough how important it is to change your Fanuc back up batteries on a regular basis especially if your machine will be shut down for any length of time. Every 6 months if machine is kept powered down.
Note: Batteries must be replaced with the power on the machine, and with Extreme Caution.”
“PLC can only be backed up by a trained technician with special software on most machines. TSG will take care of all back ups during a thorough PM inspection of your machine.”
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Download the original pdf here : 2010-11 Shoda Tech Bulletin Parameters