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11 - 3
MELSEC-F
TROUBLESHOOTING11
11 - 3
(Continued from the previous page)
*1 Confirm the completion for the initial processing and check whether or not there is any problem in the cable
connection and the Ethernet lines.
See Section 5.4, "Confirming the completion of the Initial Processing" for details on confirming the
completion for the initial processing. (Perform either one of the "Confirming the completion of the initial
processing completion" actions described in Section 5.4.)
LED name Status to check Cause/corrective action
6SD
The [SD] LED does not flash
at data sending.
1) [ERR.] or [COM.ERR] LED turns on.
• Remove the factors that turn on the [ERR.] or [COM.ERR] LED.
2) Program reviewing is required
• Review the sequence program for sending.
7RD
[RD] LED stays off and data
cannot be received.
1) [ERR.] or [COM.ERR] LED turns on.
• Remove the factors that turn on the [ERR.] or [COM.ERR] LED.
2) Poor cable connection
• Check the connection of the cable. (
*1
)
3) Local station IP address setting error
• If the cable connection is all right, review each setting value of the local station IP
address, router setting, and sub-net mask settings using FX Configurator-EN.
4) Program reviewing is required
• Review the sequence program for sending.
8 C1 to C8 Does not turn on
1) Poor cable connection
• Check the connection of the cable.
2) Program or parameter reviewing is required
• Check the program or parameter.
• Check error contents with the diagnosis function of FX Configurator-EN.
POINT
The on/off status of the [INIT], [OPEN], [ERR.] and [COM.ERR] LEDs is stored in
the module status area (BFM#28) of the buffer memory.
For more details, see Section 3.6, "List of Applications and Assignments of the
Buffer Memory".