7-2
Section
Responding to Displayed Error Messages
178
Message
Remedy
Cause
[Backup Data Error]
Memory table and History data was
initialized by backup failure.
It can be caused by lowered voltage of
the battery.
Initialization has been executed
because of an error in the
backup data area.
Check the battery voltage by checking
the color of the RUN Indicator and with
the battery check in the System Menu; if
the voltage is low, replace the battery
with a new one. (Checking the Battery
Voltage, page 160, and 7-3-1 Installing or
Replacing the Battery, page 184) Then
re-transmit the memory table data from
the NT Support Tool.
If the voltage is normal and the problem
recurs, contact your OMRON service
center.
[With memory switch setting screen]
Invalid Comm. Method
Protocol settings for serial port A
and serial port B are
mismatched.
Refer to Possible Combinations of
Communication Method Settings on page
126 and set the protocol of serial port A
and serial port B so that their settings are
matched.
* Set serial port A to None when
connecting the NT Support Tool and the
host at the same time.
