Specifications

App - 49
Appendix 4 Troubleshooting
This section explains the contents of the errors that may occur during communications
between the Ethernet module and an external device as well as the troubleshooting
procedures.
The following shows the methods for checking whether there is an error on the Ethernet
module side or not and the contents of the error.
Use one of the following methods to check whether there is an error or not and its
content, then take corrective actions.
(1) Check using the display LED on the front of the Ethernet module (Refer to Appendix
4.1.)
The display LED on/off status can be used to check whether an error is occurring in
the Ethernet module.
(2) Check through GX Developer
The GX Developer can be used to check various conditions of the Ethernet module
as well as the error code corresponding to the contents of the currently occurring
error and to perform tests.
(a) Ethernet diagnostics (using the dedicated screen)
1) Monitor for the status of various settings (Refer to Appendix 4.2.)
2) PING test (Refer to Section 6.4.)
3) Loop back test
4) COM. ERR off (Refer to Appendix 4.1.2 and 4.2.1.)
(b) System monitor (using the dedicated screen: Refer to Appendix 4.2.2.)
1) Module's detailed information ····· Module status, error code, etc.
2) H/W Information··························· LED on/off status, switch status, etc.
(c) Buffer memory batch monitor
The error code can be checked by monitoring the buffer memory of the
Ethernet module.
(3) Check the contents of the error using the error code
The contents of the error can be checked using the error code confirmed on the
above dedicated screen or by monitoring the buffer memory referring to the
following manual.
Q Corresponding Ethernet Interface Module User's Manual (Basic)
POINT
For the troubleshooting flow for each error code and communication function of the
Ethernet module, refer to the following manual.
Q Corresponding Ethernet Interface Module User's Manual (Basic)
REMARK
If line errors and other errors occur when connecting the devices of multiple
manufacturers, the users need to isolate the malfunctioning parts using a line
analyzer, etc.