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3 Configuration Units
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
3-1 CPU Units
3
3-1-5 Battery
Because the CPU Unit is shipped with the battery not mounted, the Battery-related error detection is
set to Do not use by default.
The behavior of the CPU Unit when a battery-related error is detected depends on whether battery
error detection is used or not used as shown in the table below.
When the battery is not mounted, you can set the Battery-related error detection to Do not use to
suppress battery errors.
When the battery is mounted, however, you can set the Battery-related error detection to Use to
detect battery errors.
When you mount the battery, set the Battery-related error detection to Use.
Note that the measurement of clock data starts from January 1st, 1970 if the clock oscillator stops. If
this occurs, readjust the CPU Unit’s clock data to the current time.
Note also that, in order to use the clock data for programming, you need to use system-defined
variables to read the presence or absence of the Low Battery Voltage and Real-Time Clock Stopped
error events and confirm that the clock data is normal.
Refer to the Sysmac Studio Version 1 Operation Manual (Cat. No. W504) for battery-related error
detection and clock data setting.
Battery-related Error Detection and Clock Data Settings
Cause of error
What is
affected
Behavior
When the Battery-related
error detection is set to Do
not use
When the Battery-related
error detection is set to Use
One of the following was
detected at power ON.
• Built-in capacitor discharged
• Battery not mounted
• Mounted battery discharged
Clock data • In case of clock oscillator stopping
Time measurement starts from January 1st, 1970.
• In case of low battery voltage
Time measurement continues.
Error
detection
No error is detected. The following error is detected.
• Low Battery Voltage
• Real-Time Clock Stopped
One of the following was
detected after power ON.
• Battery was removed
• Mounted battery discharged
Clock data Time measurement continues.
Error
detection
No error is detected. The following error is detected.
• Low Battery Voltage
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