User`s manual

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MELSEC
11 TROUBLESHOOTING
11.4.2 Flowchart to use when SD/RD LED does not turn on
NO
YES
NO NO
YES
YES
YES
NO
NO NO
NO
YES
YES
YES
An error occurs.
Are the
parameters for the
master station
OK?
Check the parameters for
the master station.
Does the
"SD" LED remain
unlit?
Does the
"RD" LED remain
unlit?
Using the other station,
turn the RX, RY, RWw
and RWr being used in
the PC on/off.
Using the PC, turn the
RX, RY, RWw and RWr
assigned to the host
on/off.
Replace the
A80BDE-J61BT13.
Replace the
A80BDE-J61BT13.
Monitor the RX, RY,
RWw and RWr with the
other station.
Monitor the RX, RY, RWw
and RWr with the PC.
Did the RX,
RY, RWw and RWr
turn on/off with
the PC?
Did the RX,
RY, RWw and RWr
turn on/off with
the PC?
Did the RX,
RY, RWw and RWr
turn on/off with
the PC?
Are the
monitor condition
and user program
normal?
Check the monitor
condition or user program.
Replace the
A80BDE-J61BT13, since
the "SD" and "RD" LEDs
are broken.
Contact our sales agent
or branch office nearby.
Normal