8-4
Problem Cause Solution Related
Buzzer
sounds
continuously
Bit F of the first word in the basic
communication area bit device is set to
ON.
Set the F bit to OFF on the PLC side.
(Do not use the basic communication
area with ladder programs.)
→6.2
Backlight
color
changes/
flashes
Bits A and B, and Bit D, of the first word
(backlight color setting) in the basic
communication area bit device are set to
ON. Or, Bits C and D (backlight flashing
setting) are set to ON.
Perform correct bit operations on the
PLC side. (Do not use the basic
communication area with ladder
programs.)
→6.2
Cannot
transf er data
from GTWIN
1) The screen transfer cable is not
connected.
2) The PC and GT main unit COM. port
are connected.
1) Confirm that the screen transfer cable
is correctly and firmly connected.
2) Connect to TOOL port with screen
transfer cable.
→GTWIN
HELP
- 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)
An error has occurred in the GT system. 1) After confirming the safety of the
device, etc., turn off the power supply
and then turn it on again. The GT main
unit CPU will be reset.
2) If 1) produces no change, bring up the
system menu and initialize the memory
(F-ROM), then transfer data again from
GTWIN to the GT main unit.
NOTE:
When doing this, all base screen data,
GT setting data, keyboard screen data,
and bitmap data will be lose. Before
doing this, make sure all data has been
backed up.
3) If 2) produces no change, set the
operating mode setting switches 2, 3 and
4 on the rear of the main unit to ON and
reset the power supply.
NOTE:
When doing this, all of the contents will
revert to those in effect at the time of
shipping, and all of the GT main unit
memory contents will be cleared. Before
doing this, make sure all data has been
backed up.
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