Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 465

APPENDICES
No. Name
12
Current communication
SW006A
speed value
(106)
2
SW006B Maximum link scan time
(107)
2
SW006C Minimum link scan time
(108)
2
SW006D Current link scan time
(109)
2
Low-speed cyclic scan
SW006E
time
(110)
2
SW0070
(112)/
SW0071
Baton pass status of each
(113)/
station
SW0072
(114)/
SW0073
(115)
2: Valid only when the SB0047 is off. When it turns on (error), the last data are retained.
12: Available only in the twisted bus system.
App - 26
Table 4 Link special register (SW) list (continued)
Description
Stores the current communication speed.
0: 156kbps
1: 312kbps
2: 625kbps
3: 1.25Mbps
4: 2.5Mbps
5: 5Mbps
6: 10Mbps
FF: Not detected
Stores the maximum/minimum/current values of the link scan
time (unit (ms)).
The values for the control station and normal stations vary.
(PLC to PLC network)
Sequence scan 0
Link scan
Control station/
normal station
When the constant link scan is set, the values are as follows:
Control station
Measured link scan value + KB of the link scan
(Setting value) <
time equation
Measured link scan value + KB of the link scan time equation
Measured link scan value + KB of the link scan
(Setting value) >
time equation
Measured link scan value
Normal station Constant link scan that has been set
(Remote I/O network)
Sequence scan 0
Link scan
Remote master station
Remote I/O station
Stores the number of link scans in the send interval of the low-
speed cyclic transmission.
Low-speed cyclic
send request
1 2 3 4
Link scan
Low-speed cyclic
Send interval
transmission
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)
b15 b14 b13 b12
16 15 13
SW0070 14
SW0071 32 31 30 29
SW0072 48 47 46 45
SW0073 64 63 62 61
END 0 END
END 0 END
5 6 2 3 4
1
to
b4 b3 b2 b1 b0
to 5 3
4 2 1
to
21 20 19 18 17
to 34
37 36 35 33
to
53 52 51 50 49
Numbers 1 to 64 in the above table
indicate the station numbers.
[Availability column] Loop: optical loop, Bus: coaxial/twisted bus
MELSEC-Q
Use permitted/prohibited
Remote
Control Normal
master
station station
station
Loop Bus Loop Bus Loop
: Available,
Remote I/O
station
Bus Loop Bus
: Not available
App - 26