Filter
Top Products
App - 30 App - 30
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
7
SW00D0
(208)
to
SW00DF
(223)
Loop switch data
Stores the cause and status of the loop switch.
Whether the data should be overwritten or retained is set in the
common parameters.
to
Cause
b15
to
b8
b7
b6
b5
b4 b3 b2 b1 b0
Status after switching
SW00D0
SW00DF
to
<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 the
switching>
0: Multiplex transmission
(Forward
loop/reverse loop
normal)
1: Data link by forward
loop
2: Data linking by
reverse loop
3: Data linking by
loopback
Turning ON Clear loop switch count (SB0009) clears the stored
value.
7 8
SW00E0
(224)
to
SW00E7
(231)
Switch request station
Stores the number of the stations that requested the loop switch.
b15 b0
to
b8 b7
to
Odd numbered
switch station
Even numbered
switch station
SW00E0
SW00E7
to
Turning ON Clear loop switch count (SB0009) clears the stored
value.
2
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 4 3 2 1
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
to
Numbers 1 to 64 in the above table
indicate the station numbers.
2
SW00EC
(236)
Low-speed cyclic
transmission start
execution results
Stores execution results for low-speed cyclic transmission start
execution results.
0 : Test normal
Other than 0
: Test error content (refer to the error codes in
Section 8.3)
2: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
7: To reset the SW00CE to SW00E7, turn on the SB0009.
8: For the loop switch request station, stations other than the ones at both ends of the loop may be stored because the loop switch request is issued by the
station that first detected the loop error.