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MELSEC-GOT
7 TROUBLESHOOTING
Station number
switch setting correct
(not repeated)?
Correct station number setting.
"L RUN" LED lit?
"SD" LED lit (flicker)?
Communication cable
wiring correct*1?
Corresponding module faulty
Corresponding module faulty
(Baudrate switch)
Correct communication cable wiring.
Y
N
Y
N
Y
Y
N
"SD" LED lit (flicker)?
Y
N
Baudrate setting correct?
Y
N
N
Correct baudrate setting.
Switch power on again
or turn on reset switch.
F
rom preceding page From preceding page
Corresponding module faulty
(Station number switches)
Correct station number setting.
Y
N
Corresponding module faulty
(Station number switches)
Station number
switch setting correct
(not repeated)?
Switch power on again
or turn on reset switch.
Switch power on again
or turn on reset switch.
Complete
*1: Check for short circuit, reverse connection, wire breakage, no terminal resistor, improper FG connection, improper overall
distance and improper interstation distance.
From preceding page