Error Messages And Corrective Action - Mitsubishi Electric GOT2000 Series User Manual

13.8 Error Messages and Corrective Action

This section describes the error messages displayed when the FX ladder monitor function is executed, and corrective
action.
Error message
ENTRY CODE MISMATCH
FILE NOT FOUND
PLC COMMUNICATION ERROR
No END instruction.
Instruction code abnormal.
Ladder creation bad.
Please release the keyword.
The keyword is registered.
PLC is protected.
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13.8 Error Messages and Corrective Action
Description
The specified keyword is different from
the keyword that is registered in the
object PLC CPU.
• An attempt was made to switch to the
FX ladder monitor screen when a
sequence program had not been read.
• When the file is selected and the
"Read" key is pressed, the selected
file does not exist in the PLC drive.
Cannot communicate with PLC CPU of
the specified network No. or station No.
The specified drive does not exist.
The sequence program has no END
instruction.
The sequence program has an abnormal
command code.
The sequence program has an abnormal
circuit.
Communication is not possible because
a keyword is registered in the target
PLC. (For FX3U(C) only)
A keyword is set to the PLC that is
targeted to the PLC reading on the PLC
reading screen.
The sequence program is protected by a
block password at the PLC reading. (For
FXCPU only)
Corrective action
Check the keyword that is registered in the object PLC
CPU and specify again.
Read the sequence program that written in the object
PLC CPU.
Check and correct the following:
• Does the specified PLC CPU exist?
• Is it online? (Data communication status?)
• Has an error occurred?
• Power on the GOT again.
and so on.
Check the sequence program with the peripheral
device (GX Developer).
Check the sequence program with the peripheral
device (GX Developer).
Check the sequence program with the peripheral
device (GX Developer).
Release the keyword for the target PLC.
Release the keyword for the target PLC.
Release the block password for the sequence program.