Filter
Top Products
6 - 3 6 - 3
MELSEC-Q
6 PROGRAMMING
No. Name Description
Use permitted/prohibited
Control
station
Normal
station
Remote
master
station
Remote I/O
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
1
SW0070
(112)/
SW0071
(113)/
SW0072
(114)/
SW0073
(115)
Baton pass status
of each station
Stores the baton pass status of each station (Including the host).
<Online>
0: Normal (including the stations with the maximum station
number and smaller numbers as well as reserved stations)
1: Abnormal
<Offline test>
0: Normal
1: Abnormal (including the stations with the maximum station
number and smaller numbers as well as reserved stations)
16
32
48
64
15 14 13 5 4 3 2 1
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
SW0070
SW0071
SW0072
SW0073
to
Numbers 1 to 64 in the above table
indicate the station numbers.
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.
If a CPU module installed together with QJ71LP21S-25 is turned
OFF, detection of a data link error may take more time than usual.
For immediate detection of a data link error, program an interlock
using the link relay (LB) in each station's send range. For details,
refer to the Q corresponding MELSECNET/H Network System
Reference Manual (PLC to PLC network).
[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.