Appendix 2 List Of Link Special Register (Sw) Areas - Mitsubishi Electric MELSEC iQ-R Series User Manual

Appendix 2
The link special register (SW) stores the information during data link as a numerical value. Error locations and causes can be
checked by monitoring the link special register (SW).
Application of the link special register (SW)
By using the 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.
Range where data are stored by users and range where data are stored by the system
• Stored by users: None
• Stored by the system: SW0020 to SW0FFF
List of link special register (SW) areas
The following lists the link special register (SW) areas.
Do not write any data to an area whose number is not on the list or range where data are stored by the
system. Doing so may cause malfunction of the programmable controller system.
No. Name
SW0040 Network number
SW0042 Station number
SW0043 Mode status of own
station
SW0047 Baton pass status of
own station
SW0048 Cause of baton pass
interruption
SW0049 Cause of data link stop
SW004A Data link stop request
station
List of Link Special Register (SW) Areas
Description
Stores the network number of the own station.
Range: 1 to 239
Stores the station number of the own station.
Range: 1 to 120, 255 (station number not set)
Stores the module operation mode of the own station.
00H: Online mode
02H: Offline mode
0BH: Module communication test mode
Stores the baton pass status (transient transmission availability) of the own station.
0: Data link in progress
2: Baton pass in progress
3: Baton pass being terminated
4: Test in progress
5: Offline
Stores the cause of interruption in the communication (baton pass) of the own station.
00H: At normal communication or power-on
30H: Cable disconnection
33H: Disconnection or return in progress
40H: Offline mode
Stores the cause which stopped the data link of the own station.
This register is disabled for offline mode.
00H: At normal communication or power-on
01H: Stop direction
02H: Monitoring time timeout
10H: Parameter unreceived
11H: Station number of the own station out of the range
12H: Reserved station setting of the own station
13H: Own station number duplication
16H: Station number not set
18H: Parameter error
19H: Parameter communication in progress
1AH: Station type mismatch
1BH: Parameter mismatch
20H: Moderate/major error
Stores the station number of the station that performed the data link stop request for the own station.
Range: 1 to 120, 125 (master station)
The data link stop request is performed by 'System link stop' (SB0003) from the station stored in SW004A.
(Conditions)
• This register is enabled when 'Baton pass status of own station' (SB0047) is off.
• When 'Baton pass status of own station' (SB0047) is turned on (error), data prior to error is held.

Appendix 2 List of Link Special Register (SW) Areas

A
APPX
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