User's Manual
22 - 70
22. FA TRANSPARENT FUNCTION
22.7 Precautions
 When performing [Read to PLC], [Write to 
PLC] and other file operations on GX 
Developer, GX Works2
If any of the following GOT functions is executed during 
the file operation such as [Read to PLC] or [Write to 
PLC], an error may occur on the GOT, GX Developer, 
or GX Works2.
In this case, take the following corrective action:
• File reading in the ladder monitor function for 
MELSEC-Q
• Read/write of values of the file register specified for 
the recipe function
• Reading TC monitor set value in the system monitor 
function
*1 The numerical indicates the system alarm No.
• Reading the special module monitor CPU 
Malfunction log
• Backup/restore
• SFC monitor file reading
Error messages 
on GOT
Corrective 
action on GOT 
side
Error messages 
on GX Developer 
and GX Works2
Corrective 
action on GX 
Developer and 
GX Works2
The file is not 
found.
With no file 
operation being 
executed on 
GX Developer 
or GX Works2, 
re-execute the 
file reading.
File access 
failure.
Please retry.
With no file 
reading being 
executed in the 
ladder monitor 
function for 
MELSEC-Q, 
re-execute the 
file operation.
Error messages 
on GOT
Corrective 
action on GOT 
side
Error messages 
on GX Developer 
and GX Works2
Corrective 
action on GX 
Developer and 
GX Works2
358 PLC file 
access failure.
Confirm PLC 
drive.
*1
With no file 
operation on 
GX Developer 
or GX Works2, 
turn ON the 
trigger device 
for the recipe 
function again.
File access 
failure.
Please retry.
Execute the 
file access 
operation 
again with the 
recipe in-
process signal 
in GOT system 
information 
OFF.
PLC file system 
error. Unable to 
communicate 
with PLC.
Error messages 
on GOT
Corrective 
action on GOT 
side
Error messages 
on GX Developer 
and GX Works2
Corrective 
action on GX 
Developer and 
GX Works2
No message is 
displayed.
(The TC set 
value space is 
blank.)
With no file 
operation being 
executed on 
GX Developer 
or GX Works2, 
re-execute the 
TC monitor.
File access 
failure.
Please retry.
With no TC set 
value being 
read, re-
execute the file 
operation.
Error messages 
on GOT
Corrective 
action on GOT 
side
Error messages 
on GX Developer 
and GX Works2
Corrective 
action on GX 
Developer and 
GX Works2
Communication 
error
With no file 
operation being 
executed on 
GX Developer 
or GX Works2, 
re-execute the 
CPU 
malfunction log 
reading.
File access 
failure.
Please retry.
With no special 
module 
monitor 
malfunction log 
being read, 
execute the file 
operation.
Error messages 
on GOT
Corrective 
action on GOT 
side
Error messages 
on GX Developer 
and GX Works2
Corrective 
action on GX 
Developer and 
GX Works2
Backup
With no file 
operation being 
executed on 
GX Developer 
or GX Works2, 
re-execute the 
backup.
―
With no 
backup being 
executed, 
execute the file 
operation.
Restore
With no file 
operation being 
executed on 
GX Developer 
or GX Works2, 
re-execute the 
restore.
―
With no restore 
being 
executed, 
execute the file 
operation.
Error messages 
on GOT
Corrective 
action on GOT 
side
Error messages 
on GX Developer 
and GX Works2
Corrective 
action on GX 
Developer and 
GX Works2
―
With no file 
operation being 
executed on 
GX Developer 
or GX Works2, 
re-execute the 
file reading.
―
With no special 
module 
monitor CPU 
malfunction log 
being read, 
execute the file 
operation.










