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APPX
Appendix 5 List of Link Special Register (SW)
Appendix 5
List of Link Special Register (SW)
The link special register (SW) stores the information during data link as a numerical value. Error locations and causes can be
checked by using or monitoring the link special register (SW) in programs.
Application of link special register (SW)
By using link special register (SW), the status of CC-Link IE Field Network can be checked from HMI (Human Machine
Interfaces) as well as the engineering tool.
Refresh of link special register (SW)
To use link special register (SW), set them in "Refresh Settings" under "Basic Settings" so that they are refreshed to the
devices or labels of the CPU module. (
Range where data are stored by users and range where data are stored by the system
The following ranges correspond to when the link special register areas (SW) are assigned from SW0000 to SW01FF.
• Stored by users: SW0000 to SW001F
• Stored by the system: SW0020 to SW01FF
List of link special register (SW)
The following table lists the link special register areas (SW) when they are assigned from SW0000 to SW01FF.
Do not write any data to an area whose number is not on the following list or ranges where data are stored by
the system. Doing so may cause malfunction of the programmable controller system.
No.
Name
Description
Availability
Master
station
(submaster
station)
Local
station
SW0000
Link startup/stop
direction
Set the content of data link startup/stop directions.
00H: Own station
01H: All stations
02H: Specified stations
80H: Own station enforced (enabled only for data link startup)
81H: All stations enforced (enabled only for data link startup)
82H: Specified stations enforced (enabled only for data link startup)
• Data link startup/stop is performed by 'System link startup' (SB0002) or 'System
link stop' (SB0003).
• When 02H (specified station) or 82H (specified station enforced) is selected, the
own station is not included.
(Master
operating
station only)
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