Table of Contents
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11
TROUBLESHOOTING
(2) Troubleshooting of errors indicated by X signals
No.
Symptom
The Module READY (X0)
1
turned off.
The Watch dog timer error
2
(X1F) turned on.
The Automatic
communication parameter
3
setting, error completed
(X5/XD) turned on.
The MODBUS
device
assignment parameter
4
setting, error completed
(X9) turned on.
The Automatic
communication operation
5
status (X6/XE) does not
turn on.
The Automatic
6
communication operation
status (X6/XE) turned off.
The Automatic
7
communication error
status (X7/XF) turned on.
11
- 3
11.1 Troubleshooting
Table11.2 Troubleshooting of errors indicated by X signals
Check point
Refer to "The RUN LED turned off."
Check the Automatic communication
parameter error code storage area
(address: 0C16
/0C18
) in the buffer
H
H
memory and identify the error code.
Check the MODBUS
device
assignment parameter error code storage
area (address: 0C13
) in the buffer
H
memory and identify the error code.
Check if the automatic communication
function is activated.
Check if the Automatic communication
parameter setting, error completed (X5/
XD) is on.
Check if the Automatic communication
stop request (Y6/YE) has been issued.
Was the UINI instruction executed?
Check if the communication with the target
device is possible.
Corrective action
Take corrective actions for the error code
and retry.
Take corrective actions for the error code
and retry.
Set the automatic communication
parameters by GX Configurator-MB and
activate them.
Or, set the automatic communication
parameters by a sequence program and
activate them.
Refer to "The Automatic communication
parameter setting, error completed (X5/
XD) turned on."
Restart the automatic communication
function.
After execution of the UINI instruction, set
the automatic communication parameters
atain, and start the automatic
communication function.
Check the Automatic communication
operation status storage area (0C20
0C21
/0C22
to 0C23
) in the buffer
H
H
H
memory and identify the parameter
number of the error cause.
Take corrective actions according to the
error code currently stored in the
Automatic communication error code
storage area (0C28
to 0C47
H
0C67
) or the exception code sent from
H
the target slave.
(Continued on next page)
Reference
This section
(1)-1
Section 11.4
Section 11.4
Section 7.2
Section 9.1.1
This section
(2)-3
Section 5.2.1
Section 7.2
to
H
Section 11.4
/0C48
to
H
H
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Troubleshooting
