User manual

7–15
Chapter 7 – RUN Mode and Errors
LT Series User Manual
This section explains the messages that appear when an error has occurred in the
LT unit during RUN mode. The problem causing the error message and its related
countermeasure are explained in the table below.
After a problem has been solved, unplug the LT unit’s power cord and then reat-
tach it. (Only the latest error message will appear on the LT unit’s screen.)
7.4 Error Messages
7.4.1 Error Message List
Error Message Problem Countermeasure
SYSTEM ERROR
(03 : **)
During screen data transfer, an
unrecoverable error occurred. 7.4.2 Error Message Details
SYSTEM ERROR
(*** : *** : ***)
During screen data transfer, an
unrecoverable error occurred. 7.4.2 Error Message Details
ILLEGAL ADDRESS IN
SCREEN DATA
(00B:***:***)
Settings are used that overlap addresses. Set the addresses correctly
after checking the screen data.
UNSUPPORTED TAG IN
SCREEN DATA
The LT currently in use does not support
the desired feature.
Set the feature correctly after
checking the screen data.
PLC NOT CONNECTED
(0 2 : FF) and (0 2 : F7)
The communication cable is not connected
correctly.
Re-connect the
communication cable
correctly.
PLC's power is not turned ON. Turn ON the PLC's power.
LT unit INITIALIZE settings (Setup I/O, PLC
Setting) are incorrect.
Check the INITIALIZE settings
and make any necessary
corrections.
The host and LT Powering Up sequence
was incorrect.
Turn ON the PLC's power and
wait for 2-3 seconds, then turn
ON the LT unit's power.
The communication cable is not connected
properly.
Check the communication
cable and connect it correctly.
The communication cable was
disconnected while the LT was ON.
Turn the LT OFF and then ON
again.
The LT was powered OFF, then ON during
communication with PLC.
Turn the LT OFF and then ON
again.
Noise occurred in the communication
cable.
Check the communication
cable and connect it correctly.
This LT unit's station number is same as
another LT.
Check all LT station numbers,
and set them so they are they
do not overlap.
PLC is powered OFF, then ON during
communication with LT.
Turn the LT OFF and then ON
again.
PLC NOT RESPONDING
(02 : FE)
RECEIVE DATA ERROR
(02 : FD)
GP STATION NO.
DUPLICATION ERROR
(02 : F9)