11 COMMUNICATION BETWEEN THE MASTER STATION AND LOCAL
STATIONS
Local station status confirmation
Control program
Control program of station number 1
Control program of station number 5
Confirmation of data link status
Control program
Confirmation of data link status
Control program
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(1) Master station program
(2) Local station program
(a) Ver.1 compatible local station (station number 1) program
(b) Ver.2 compatible local station (station number 5) program
MELSEC-Q
Station number 1 is faulty
Station number 5 is faulty
Control program using
data received from local
station of station No. 1
Program to generate
transmission data to local
station of station No. 1
Control program using data
received from local station
of station No. 5
Program to generate
transmission data to local
station of station No. 5
Local station is performing
data link
Control program using data
received from a master station
Program to generate send
data to the master station
Local station is performing
data link
Control program using data
received from a master station
Program to generate send
data to the master station
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