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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
SW006B
(107)
Maximum link scan time
Stores the maximum/minimum/current values of the link scan
time (unit (ms)).
The values for the control station and normal stations vary.
Sequence scan
Link scan
Control station/
normal station
0END0END
(PLC to PLC network)
Normal station Constant link scan that has been set
When the constant scan is set, the values are as follows:
Control station
(Setting value) <
Measured link scan value + KB of the link scan
time equation
(Setting value) >
Measured link scan value + KB of the link scan time equation
Measured link scan value + KB of the link scan
time equation
Measured link scan value
Link scan
Remote I/O station
Remote master station
Sequence scan
0END
0
END
(Remote I/O network)
2
SW006C
(108)
Minimum link scan time
2
SW006D
(109)
Current link scan time
2
SW006E
(110)
Low-speed cyclic scan
time
Stores the number of link scans in the send interval of the low-
speed cyclic transmission.
Low-speed cyclic
send request
Link scan
Low-speed cyclic
transmission
123456
1
234
Send interval
2
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
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
SW0070
SW0071
SW0072
SW0073
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.