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Troubleshooting
Error
Buzzer sounds
continuously.
Backlight color
changes/flashes.
Data cannot be
transferred from
GTWIN.
Screen is blank.
(power supply and
substitution settings
noted above do not
apply)
An incorrect screen is
displayed. (error
codes and erroneous
date and time items
noted above do not
apply)
Switch doesn't work.
(grid and validity
settings noted above
are correct)
Buzzer sounds
continuously.
5-4
Cause
Bit F of the first word in the
basic communication area bit
device is set to ON.
The backlight flashing flag or
the backlight enable flag of the
basic communication area may
be ON.
A USB cable is not connected.
The network type in the
communication settings has
been set to "RS-232C".
A USB driver is not installed.
An error has occurred in the GT
system.
Solution
Refer to the basic communication area map and
check the operation of the bit allocated to PLC.
Confirm that the USB cable is firmly connected.
Select "Communication" > "Communication
Settings" from the GWIN menu, and set "Network
type" to "USB(GT)".
Refer to the installation guide and install the USB
driver for GT.
1) After confirming the safety of the device, etc.,
turn off the power supply and then turn it on again.
The GT CPU will be reset.
2) Set the operation mode setting switches 2, 3 and
4 to ON, turn on the power supply, and clear
"Holding Data" and "GT Data".
Reset the operation mode setting switch to OFF
and turn on the power supply.
NOTE: All screen data, setting files and hold data
will be cleared. Make sure screen data and setting
files have been backed up. However, hold data
cannot be backed up.
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