A-31
Appendices
NJ-series CPU Unit Software User’s Manual (W501)
A-3 System-defined Variables
App
A-3-1 System-defined Variables for the Overall NJ-series Controller (No Category)
Functional Classification: Backup
Functional Classification: Power Supply
Variable name Meaning Function Data type
Range of
values
Reference
_BackupBusy
(Ver. 1.03)
Backup Function
Busy Flag
TRUE when a backup, restoration, or verifica-
tion is in progress.
BOOL TRUE or
FALSE
page A-56
Variable name Meaning Function Data type
Range of
values
Reference
_PowerOnHour Total Power ON
Time
Contains the total time that the power has
been ON.
Contains the total time that the CPU Unit has
been ON in 1-hour increments.
To reset this value, overwrite the current value
with 0.
The value is not updated after it reaches
4294967295.
This variable is not initialized at startup.
UDINT 0 to
4294967295
page A-57
_PowerOnCount Power
Interruption
Count
Contains the number of times that the power
supply has been interrupted. The value is
incremented by 1 each time the power supply
is interrupted after the first time that the power
was turned ON.
To reset this value, overwrite the current value
with 0.
The value is not updated after it reaches
4294967295.
This variable is not initialized at startup.
UDINT 0 to
4294967295
page A-57
_RetainFail Retention
Failure Flag
TRUE at the following time (failure of retention
during power interruptions).
• When an error is detected in the battery-
backup memory check at startup.
FALSE at the following times (no failure of
retention during power interruptions).
• When no error is detected in the battery-
backup memory check at startup.
• When the user program is downloaded.
• When the Clear All Memory operation is
performed.
Note When the encoder home offset data is
not retained, the status is given in the
error status of the axis variable, and not
in this flag.
BOOL TRUE or
FALSE
page A-57
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