Specifications
App - 25
Link special register (SW) list (Continued)
Use permitted/prohibited
Control
station
Normal
station
Remote
master
station
Remote
I/O
station
Number Name Description
Optical
Coaxial
Optical
Coaxial
Optical
Coaxial
Optical
Coaxial
*
2
*
7
SW00D0
(208)
to
SW00DF
(223)
Loop switching
data
Stores the cause and status of the loop switching.
Whether the data should be overwritten or retained is set in the common parameters.
to
to
Cause
b15
to
b8 b7 b6 b5 b4 b3 b2 b1 b0
Status after switchin
g
SW00D0
SW00DF
<Cause> The bit corresponding to each error is set to 1.
All 0 : Return direction
b0 : Forward loop H/W error
b1 : Reverse loop H/W error
b2 : Forward loop forced error
b3 : Reverse loop forced error
b4 : Forward loop continuous communication error
b5 : Reverse loop continuous communication error
b6 : Forward loop continuous line error
b7 : Reverse loop continuous line error
<Status after switching>
0 : Multiplex transmission (Forward loop/reverse loop normal)
1 : Data link by forward loop
2 : Data link by reverse loop
3 : Data link by loopback
*
2
*
7
*
8
SW00E0
(224)
to
SW00E7
(231)
Switching request
station
Stores the number of the stations that requested the loop switching.
b15 b0to
to
b8
b7
to
Odd numbered
switch station
Even numbered
switch station
SW00E0
SW00E7
SW00E8
(232)
to
SW00EB
(235)
Module type of
each station
Stores each station's module type.
0: MELSECNET/10 module
1: MELSECNET/H module
16
32
48
64
15 14 13
5
4321
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
SW00E8
SW00E9
SW00EA
SW00EB
Numbers 1 to 64 in the above table
indicate the station numbers.
to
*
2
SW00EC
(235)
Low-speed cyclic
transmission start
execution results
Stores execution results for the low-speed cyclic transmission start instruction.
0 : Normal
1 or more : Abnormal (Refer to Appendix 7.1 for error codes)
*2: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
*7: To reset the SW00CE to E7, turn on the SB0009.
*8: For the loop switching request station, stations other than ones at both ends of the loop may be stored
because the loop switching request is issued by the station that first detected the loop error.