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App - 22 App - 22
MELSEC-Q
APPENDICES
Table 3 Link special register (SW) list (Continued)
No. Name Description
Availability
Control
station
Normal
station
Remote
master
station
Remote I/O
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
2
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
151413 54321
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).
2
SW0078
(120)/
SW0079
(121)/
SW007A
(122)/
SW007B
(123)
Parameter
communication status of
each station
Stores the parameter communication status of each station.
0: Executing communication other than parameter
communication (including the stations with the maximum
station number and smaller numbers as well as reserved
stations)
1: Executing parameter communication
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
SW0078
SW0079
SW007A
SW007B
to
Numbers 1 to 64 in the above table
indicate the station numbers.
2
SW007C
(124)/
SW007D
(125)/
SW007E
(126)/
SW007F
(127)
Parameter error status of
each station
Stores the parameter status of each station
0: Normal parameter (including the maximum station number
and smaller numbers as well as reserved stations)
1: Abnormal parameter
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
SW007C
SW007D
SW007E
SW007F
to
Numbers 1 to 64 in the above table
indicate the station numbers.
2 11
SW0080
(128)/
SW0081
(129)/
SW0082
(130)/
SW0083
(131)
CPU operation status of
each station (1)
Stores each station’s CPU status (including the host).
Valid only for stations registered as normal in the SW0070 to
SW0073.
0: Normal (including the stations with the maximum station
number and smaller numbers as well as reserved stations)
1: Serious/fatal error
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
SW0080
SW0081
SW0082
SW0083
to
Numbers 1 to 64 in the above table
indicate the station numbers.
2: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
11: Serious errors are the type of errors that stop the CPU operation.
Fatal errors are also the type of errors that stop the CPU operation. (Refer to Section 8.3.3.)