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MELSEC-GOT
7 TROUBLESHOOTING
(2) If the L ERR LED of the A8GT-J61BT15 flickers
Cause Corrective Action
Mode, station number or transmission
speed switch setting was changed during
normal operation.
Return the mode, station number or transmission
speed switch setting to the previous position and
switch power on again
1.
If the L RUN LED is not lit after switching power on
again, the hardware may be faulty. Consult your
sales representative.
Station number or transmission speed
switch is faulty.
If the L ERR LED begins to flicker though switch setting
was not changed during operation, the hardware may
be faulty. Consult your sales representative.
(3) If the L ERR LED of the A8GT-J61BT15 is lit
Cause Corrective Action
Switch setting is outside the specified
range (station number 0 or 65 or more,
transmission speed 5 to 9).
Correct the switch setting and switch power on
again
1.
Terminal resistors are left unconnected.
Check that the terminal resistors are connected. If not,
connect them and switch power on again
1.
A8GT-J61BT15 or CC-Link dedicated
cable are affected by noise.
• Connect both ends of the shield wire of the CC-Link
dedicated cable to ground (earth conductors
separately) via SLD and FG1 of each module.
• Securely connect the FG terminal of the module to
ground.
• Securely ground the piping when running cables in
piping.
1: Switch power on again: Switch power on again or turn on the reset switch.
7.2 Troubleshooting for Dedicated Command Monitor
(1) If the error status flag turned on
Cause Corrective Action
Executed dedicated command is
incorrect.
Check if the dedicated command is incorrect or not.
Monitored device is outside the setting
range.
Check if the set device is outside the range or not.
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