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MELSEC-Q
6 PROGRAMMING
Use permitted/prohibited
Control
station
Normal
station
Remote
master
station
Remote I/O
station
No. Name Description
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
1
SW0074
(116)/
SW0075
(117)/
W0076
(118)/
SW0077
(119)
Cyclic transmission
status of each
station
Stores the cyclic transmission status of each station (including the
host).
0: Executing cyclic transmission (including the station with the
maximum station number and smaller number as well as
reserved stations)
1: Cyclic transmission not executed
16
32
48
64
15
14
13 5
4
3
21
31 30
47 46
63 62
29
45
61
21 20 19 18 17
37 36 35
34
33
53 52 51 50 49
to
to
to
to
b15 b14 b13 b12 b4 b3 b2 b1 b0
SW0074
SW0075
SW0076
SW0077
to
Numbers 1 to 64 in the above table
indicate the station numbers.
[Availability column] Optical: optical loop, Coaxial: coaxial bus
: Available, : Not available
1: Valid only when SB0047 is off. When it turns on (error), the last data are retained.