Mitsubishi Electric MELSEC-Q Series User Manual page 86

(3) Precautions
(a) Detecting overlapped station numbers of the master/local module
An overlapped station number is detected in a master/local module if a station number other than a start
number is in use.
If a start station number is in use, it is not detected. (The station number 0 of the master station is detected if it
is in use.)
Check whether the station number of the station where a data link error has occurred is not already used for
other stations using Other station data link status (SW0080 to SW0083).
A local station (station number 1 with the number of occupied stations of 4) and a remote device station
Ex.
(station number 1 with the number of occupied stations of 2)
In the following case, the overlapped station number is not detected.
84
Local station
(Station No.1, no. of occupied stations: 4)
Remote device station
(Station No.4, no. of occupied stations: 2)
Station Station
Local station
No.1 No.2
Same
station
No.
Remote device
Station Station
station
No.1 No.2
Incorrect station numbers of
the remote device station
Station Station Station Station
No.1 No.2 No.3 No.4
Same
station
No.
Station Station
No.4
Correct station numbers of
the remote device station
Station Station Station Station
No.3 No.4 No.5 No.6
No.5