User manual

5.1 What to DO If Something Unusual Occurs (GT01/GT11/
GT21)
Problem
Cause
Solution
Screen is
blank
1) Power is not on. 1) Supply the power supply to unit as per
specifications.
2) (When only lamp and message parts are
configured to the base screen) Value of
substitute reference device value does not
exist in substitute data.
2) Check the address of the substitute reference
device and the device values on the PLC side.
Error code
[ER**]
appears at
the top right
of the
screen
An error has occurred in communication
between the GT and an external device (e.g.
PLC).
Refer to <5.3 Troubleshooting Error Codes>.
Screen
displays [No
Screen data]
There is no base screen data in the GT.
(Appears even when GT configuration data
exists.)
Transfer base screen data.
Screen
displays
[Screen No.
Error]
1) Screen settings from the PLC, the GT’s
switch part or the auto-paging indicate an
unregistered screen number.
1) Create and register screen content or specify the
correct screen number.
2) When bringing up the keyboard screen
during data input, an unregistered
keyboard screen number was specified.
2) Create and register keyboard screen or specify
the correct keyboard number.
3) GT configuration data and keyboard
screen data exist in the GT, but there is
no base screen data.
3) Transfer base screen data from GTWIN.
Screen
displays
[Memory is
Full]
The total capacity of transferred base screen
data exceeds the 384 Kbyte capacity of the
GT.
Delete part of the base screen data so that the
capacity doesn’t exceed the total capacity.
Data capacity can be checked by going to [View
(V)]→[Memory Usage Conditions] on GTWIN menu
bar. When the data capacity is not over the limit,
invalid data could possibly be remaining in the GT.
When transferring data, do so after deleting the
screen.
An
unspecified
screen
appeared/th
ere is
trouble when
switching
screens.
1) The screen specification in the PLC
screen setting, the GT switch part or the
auto-paging is wrong.
1) Specify the correct screen number.
2) The startup screen is specified in the GT
configuration settings (GTWIN).
2) Check the start-up screen setting for the GT
configuration settings in GTWIN. Delete
unnecessary settings and re-transfer
configuration data.
3) An erroneous device or value is specified
in the first word of the basic
communication area word device.
3) Check the device content specified on the PLC
side in the first word of the basic communication
area. (Do not use the basic communication area
with ladder programs.)
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