Specifications

App - 13
Appendix 4 Link Special Register (SW) List
The data linking information is stored in the link special registers in numerical values.
They can be used by the sequence programs, or used for investigating faulty areas
and the causes of errors by monitoring them.
The link special register (SW) that stores the link status is used for the detailed
information of the network diagnostics of GX Developer.
When multiple network modules are installed, the SW of each network module is
refreshed to the SW of the CPU module shown below if each network module's refresh
parameters are not set. If the refresh parameters are set for at least one network
module, the refresh parameters of all the network modules should be reviewed.
Module installing position Module 1 Module 2 Module 3 Module 4
Device No. SW000 to 1FF SW200 to 3FF SW400 to 5FF SW600 to 7FF
In the link special register, there are ranges that the user can set (SW0000 to
SW001F) and ranges that the system sets "0" (SW0020 to SW01FF). (When the unit
mounting position is unit 1.)
Link special register (SW) list
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
SW0000
(0)
*
1
Link stop/startup
direction content
Sets the station that stops/restarts data linking.
00
H
: Host
01
H
: All stations
02
H
: Designated station
80
H
: Host (forced stop/restart)
81
H
: All stations (forced stop/restart)
82
H
: Designated station (forced stop/restart)
SW0001
(1)/
SW0002
(2)/
SW0003
(3)/
SW0004
(4)
*
1
Link stop/startup
direction content
Sets whether the designated station should execute data linking. (When the SW0000 is
02
H
or 82
H
.)
Sets the bits to 1 for stations whose data linking is stopped/restarted.
0 : Invalid data linking stop/restart instruction
1 : Valid data linking stop/restart instruction
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
SW0001
SW0002
SW0003
SW0004
The numbers 1 to 64 in the above table
indicate the station numbers.
to
SW0008
(8)
Logical channel
setting
(channel 1)
Sets the logical channel number for physical channel number 1. (Valid only for channels
on the receiving side)
0 : Logical channel number 1 (default)
1 to 64 : Other logical channel number is set.
SW0009
(9)
Logical channel
setting
(channel 2)
Sets the logical channel number for physical channel number 2. (Valid only for channels
on the receiving side)
0 : Logical channel number 2 (default)
1 to 64 : Other logical channel number is set.
SW000A
(10)
Logical channel
setting
(channel 3)
Sets the logical channel number for physical channel number 3. (Valid only for channels
on the receiving side)
0 : Logical channel number 3 (default)
1 to 64 : Other logical channel number is set.
[Availability column] Optical: optical loop, Coaxial: coaxial bus
: Available, : Not available
*1: Used in the network tests of GX Developer.