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7 Inspection and Maintenance
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
7-2 Replacing the Battery
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If the Controller Setup has been set to detect a low-battery error, the ERROR indicator on the front of
the CPU Unit will flash when the battery is nearly discharged.
If the ERROR indicator flashes, connect the Sysmac Studio, and then check the CPU Unit’s Battery
connection if the Sysmac Studio shows a Low Battery Voltage or Real-Time Clock Stopped event. If the
Battery is properly connected, replace the Battery with a new one as soon as possible.
Once a low-battery error has been detected, it will take 5 days (at an ambient temperature of 25°C)
before the battery fails if power has been supplied at least once a day.
Clock data and variables that are retained during power interruptions can be retained by ensuring that
the CPU Unit power is not turned OFF until the Battery has been replaced.
The Battery will lose its charge faster at high ambient temperatures.
Low Battery Indicators
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