9 Troubleshooting
9.4 Troubleshooting Flowchart
125
FX3U-ENET-ADP User's Manual
1
Introduction
2
Specification
3
System
Configuration
4
Installation
5
Wiring
6
Introduction of
Functions
7
Communication
Using
MC Protocol
8
The Operation
of GX Works2
9
Troubleshooting
A
List of Special
Devices
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.
*1
<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.
Refer to the troubleshooting section
in the applicable PLC 's user's
manual and fix the problems.
YES
NO
Is the Ethernet adapter
[POWER] LED on?
NO
YES
YES
YES
Is the connection cable
securely connected?
NO
Lock the cable securely.
Is the Ethernet adapter
[ERR.] LED on?
Check whether or not a parameter
error occurred. If an error is found,
first correct it and then re-download.
NO
Is the data code
(binary/ASCII) setting of the
communication data
correct?
NO
YES
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.
(Refer to Section 6.6.)
*2
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.
Has initial
processing completed normally?
NO
(Bit 5 of D8406 (CH1) or
D8426 (CH2) turns on)
YES
Check the error log (refer to
Subsection 9.6.2 and Section 10.3),
and fix the problems.
Perform initial processing.
(Refer to Section 6.8.)
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