Omron NX-PA Series User Manual page 147

Unit model number
NX701-
Additional Information
The Battery installed at the time of purchase is only for monitoring purpose to test the battery
backup function. The Battery is exhausted depending on the period from factory checking to
actual operation, thus it may not satisfy specified battery lifetime.
Low Battery Indicators
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, Battery-backup Memory Check Error, 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.
Precautions for Correct Use
The Battery will lose its charge faster at high ambient temperatures.
NX-series CPU Unit Hardware User's Manual (W535)
Battery service life (minimum lifetime) [month]
Power ON
time rate
25°C
0% 31
25% 40
50% 57
75% 60
100% 60
6 Inspection and Maintenance
40°C 55°C
17 10
22 13
32 18
55 32
60 60
6
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