Troubleshooting Flowchart - Mitsubishi Electric FX3U-ENET-ADP User Manual

FX -ENET-ADP User's Manual
3U
9.4

Troubleshooting Flowchart

This section explains some simple troubleshooting procedures when the Ethernet adapter and an external
device have communication problems in a flowchart format.
<POINT>
If trouble occurs when using the Ethernet adapter, check the block status, error status and others for the
Ethernet adapter using the Ethernet diagnostic function of GX Works2 described in Section 8.6 and
Subsection 9.2.1.
Cannot communicate.
Check whether or not an error
occurred in the PLC main unit to
which the Ethernet adapter is installed.
Did an error
that makes the PLC
stop processing
occur?
Check the status of the applicable
Ethernet adapter.
Is the Ethernet adapter
[POWER] LED on?
Is the Ethernet adapter
[ERR.] LED on?
Is the connection cable
securely connected?
Is the data code
(binary/ASCII) setting of the
communication data
correct?
Has initial
processing completed normally?
Check the error log (refer to
Subsection 9.6.2 and Section 10.3),
and fix the problems.
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
(Bit 5 of D8406 (CH1) or
D8426 (CH2) turns on)
YES
9.4 Troubleshooting Flowchart
*1
Refer to the troubleshooting section
in the applicable PLC 's user's
manual and fix the problems.
Turn on the PLC and Ethernet adapter
again.
If the [POWER] LED does not turn on
even after resetting, the Ethernet
adapter hardware may be faulty.
Replace the Ethernet adapter and
restart all the external devices that
communicate with the local station.
Check whether or not a parameter
error occurred. If an error is found,
first correct it and then re-download.
Lock the cable securely.
Data cannot be sent/received
because the data code is different in
the sending node and receiving node
and the command can therefore not
be successfully decoded.
Change the setting in
[Communicational data code] of
[Operational settings] using
GX Works2.
*2
(Refer to Section 6.6.)
Perform initial processing.
(Refer to Section 6.8.)
9 Troubleshooting
1
2
3
4
5
6
7
8
9
A
125