Mitsubishi 800 Series User Manual page 67

7 TROUBLESHOOTING
From preceding page From preceding page
"L RUN" LED lit?
"SD" LED lit (flicker)?
Station number
switch setting correct
(not repeated)?
Corresponding module faulty
(Station number switches)
*1: Check for short circuit, reverse connection, wire breakage, no terminal resistor, improper FG connection, improper overall
distance and improper interstation distance.
7 - 4
N
Y
"SD" LED lit (flicker)?
Y
N
Corresponding module faulty
Y
Station number
switch setting correct
(not repeated)?
Y
Corresponding module faulty
(Station number switches)
N
Correct station number setting.
Y
Switch power on again
or turn on reset switch.
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N
N
Baudrate setting correct?
Correct baudrate setting.
Y
Switch power on again
or turn on reset switch.
N
Communication cable
wiring correct*1?
Correct communication cable wiring.
Y
Corresponding module faulty
(Baudrate switch)
N
Correct station number setting.
Switch power on again
or turn on reset switch.
MELSEC-GOT
From preceding page
7 - 4