Mitsubishi MELSEC-A Series Reference Manual page 213

7. DATA LINK SETTINGS
Local station No. 2(L2)
Used as
internal
relays (M)
Coil Contact
in the
master
station
Link using local station No. 3(L3/m) as the master station for the third tier
Master station (L3/m)
Used as
internal
relays (M)
Coil Contact
in the
master
station
Coil: Performs ON/OFF control of link relays (B).
Contact: Reads ON/OFF data using contacts of link relays (B).
: Usable range
Fig 7.45 Link relays (B) assignment example (Continued)
7 - 75
Local station No. 1 ( 1)
Used as
internal
relays (M)
Coil Contact
in the
master
station
Local station No. 3 ( 3)
Used as
internal
relays (M)
Coil Contact
in the
master
station