Omron NV Series Setup Manual page 139

Troubleshooting the NV3W
Error
• Nothing is displayed (and the
above power supply and
replacement setting problems do
not exist).
• The screen display is not correct
(and the above message and
date/time problems do not exist),
excluding error codes.
• Switches do not work (and the
above grid and enable setting
problems do not exist).
• The buzzer does not turn OFF.
Cause
There is an error in the system.
The power supply to the PT was
turned OFF while updating the firm-
ware.
Countermeasure
1. Check the controlled system to be sure it is
safe to do so, and then cycle the power sup-
ply. The CPU in the PT will be reset.
2. If the problem is not fixed by performing the
countermeasure given above, initialize the
built-in Flash Memory from the System Menu
and then transfer the data to the PT again
from the NV-Designer.
Note When memory is initialized, all base
screen data, PT setting data, and key-
board screen data will be lost. Be sure to
backup this data in advance.
3. If the problem is not fixed by performing the
countermeasures given above, turn ON pins
2, 3, and 4 on the DIP switch on the back of
the PT and cycle the power. After the PT has
been reset, return the DIP switch to the pre-
vious settings and cycle the power again.
Note This operation will return the PT to the
default settings and clear the memory in
the PT. Be sure to back up any required
data in advance.
If normal operation is not recovered after per-
forming the above three countermeasures,
contact your OMRON representative.
Section 7-3
119