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MELSEC-F
4 SETTINGS AND PROCEDURES PRIOR TO OPERATION
4.7.2 Hardware test (H/W Test)
This section explains the RAM and ROM tests for the Ethernet module. The procedure
for the hardware test is as shown in the table below.
The test results are judged from the LED displays on the front of the Ethernet module.
Status of LED
Step Description of operation
[RUN] [C1] [ERR.]
1
Perform a hardware test in operation mode.
(“0003H” is written to BFM #202)
2
The contents of BFM#202 are written to the flash ROM
("9872H” is written to BFM#25)
3
• Turn off the PLC.
• Set the RUN/STOP switch to the STOP side.
• Reboot the PLC’s and the Ethernet module’s power.
4 The test is in execution.
Normal
5
The test results are shown on the LED after
approximately 5 seconds.
Error
6 Turn off the PLC and the Ethernet module.
: Lit : Off
The following are probable causes of errors.
• Ethernet module RAM/ROM error
An error code is stored in the error log area (BFM #229) in the buffer memory of the
Ethernet module; the error content can then be checked from GX Developer. (See
Sections 11.2 and 11.3.)