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8 PROGRAMMING
MELSEC-QnA
Table 8.2 Link special register list (continued)
Availability
(
: available,
: not available )
Online
Number Name Description
Master
station
Local
station
Offline
SW0069
(669
H)
Loading status
2
The station number overlap and consistency with the parameters are
stored for each module.
0 : Normal
Other than 0 : Stores error code (Refer to Section 13.3.)
Details are stored in SW0098 to 9B and SW009C to 9F.
SW006A
(66A
H)
Switch setting status
Switch setting status is stored.
0 : Normal
Other than 0 : Stores error code (Refer to Section 13.3.)
SW006D
(66D
H)
Max. link scan time Stores the maximum value of the link scan time (in 1 ms units).
SW006E
(66E
H)
Current link scan time Stores the current value of the link scan time (in 1 ms units).
SW006F
(66F
H)
Min. link scan time Stores the minimum value of the link scan time (in 1 ms units).
SW0070
(670
H)
Total number of stations
Stores the final station number set in the parameter.
1 to 64 stations
SW0071
(671
H)
Max. communication
station number
Stores the maximum station number (station number of the station
number setting switch) in the data link.
1 to 64 (stations)
SW0072
(672
H)
Number of connected
modules
Stores the number of modules in the data link.
1 to 64 (modules)
SW0073
(673
H)
Standby master station
number
Stores the standby master station number.
1 to 64 (stations)
Stores the setting status of reserved station.
0: Not reserved station
1: Reserved station
SW0074
(674
H)
SW0075
(675
H)
SW0076
(676
H)
SW0077
(677
H)
Reserved station specified
status
1
1
SW0074
b0
1 to 64 in the table indicates station numbers.
2
b1
3
b2
4
b3
to
to
13
b12
14
b13
15
b14
16
b15
17
SW0075
18
1920
to
2930
3132
33
SW0076
3435
36to
45
4647
48
49SW0077
5051
52to61626364
Stores the error invalid station setting status.
0: Not error invalid station
1: Error invalid station
SW0078
(678
H)
SW0079
(679
H)
SW007A
(67A
H)
SW007B
(67B
H)
Error invalid station
specified status
1
1
SW0078
b0
1 to 64 in the table indicates station numbers.
2
b1
3
b2
4
b3
to
to
13
b12
14
b13
15
b14
16
b15
17
SW0079
18
1920
to
2930
3132
33
SW007
A
3435
36to
45
4647
48
49SW007B
5051
52to61626364
Stores the temporary error invalid station specified status.
0 : Not temporary error invalid station
1 : Temporary error invalid station
SW007C
(67C
H)
SW007D
(67D
H)
SW007E
(67E
H)
SW007F
(67F
H)
Temporary error invalid
station specified status
1
1
SW007C
b0
1 to 64 in the table indicates station numbers.
2
b1
3
b2
4
b3
to
to
13
b12
14
b13
15
b14
16
b15
17
SW007D
18
1920
to
2930
3132
33
SW007E
3435
36to
45
4647
48
49SW007F
5051
52to61626364
: Link special register added to the function version B or later
1 : Turns on only the bit for the head station number.
2 : Check is performed only when the link is started up, and stored.