Mitsubishi MELSEC Q Series User Manual page 399

13 TROUBLESHOOTING
From previous page
2 Incomplete match
Occupies 2
stations or more
Station
number n
3 Complete match
Occupies 1
station or more
Station
number n
Station
number m
Occupies 1
station or more
13 - 9
From previous page
Is the "SD" LED lit (flashing)?
Y
Are the station
number switches set properly?
(Are there any station numbers
that are completely
matched? 3)
Y
Is the "MST" LED unlit?
Y
Corresponding module
malfunction
(station number switch)
Station
number
n + 1
Station
Station
number
number m
m + 1
Occupies 1
station or more
Station
number
n + 1
Station
number
m + 1
N
Is the transmission rate
setting correct?
Y
Is the communication
cable wired properly?
1
Y
Corresponding module
malfunction
(baud rate switch)
N
Set the correct
station numbers
N
The master station
already exists. Reset the
module to operate as the
standby master station.
End
Station
number n
Or
Station
Station
number
number m
m + 1
Occupies 2
stations or more
MELSEC-Q
From previous page
N
Set the correct transmission
rate
Turn on the power again/
turn on the reset switch
N
Wire the communication
cable properly
Turn on the power again/
turn on the reset switch
Occupies 1
station or more
Station
number
n + 1
13 - 9