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CHAPTER 11 PROGRAMMING
11
11.3 Using Link Special Relay (SB) and Link Special Register (SW)
11. 3 Using Link Special Relay (SB) and Link Special Register
(SW)
This section describes how to use link special relay (SB) and link special register (SW).
Remark
For details on link special relay (SB) and link special register (SW), refer to the following:
• Page 273, Appendix 3
• Page 286, Appendix 4
(1) Stop and restart of cyclic transmission
Stop and restart of cyclic transmission are executed by CC-Link IE Field Network diagnostics, but can also be
executed through link special relays (SB) and link special registers (SW). ( Page 138, Section 9.4)
(a) Stop and restart of cyclic transmission (other station)
(Cyclic transmission stop)
1. Specify the station to stop cyclic transmission in the following link special registers (SW).
• Specifying a target station
Link stop/start direction (SW0000)
• Specifying a station number
Link stop/start direction (SW0001 to SW0008)
2. Turn on System link stop (SB0003).
3. When the master/local module accepts the request, System link stop request accept status
(SB0056) turns on.
4. When cyclic transmission stop is completed, System link stop completion status (SB0057) turns
on.
5. Station number of the station that sent the cyclic transmission stop request is stored in Data link
stop request station (SW004A). (It is stored in the station that received the stop request.)
6. If cyclic transmission is stopped with error, an error code will be stored in Data link stop status
(entire system) (SW0053).
7. Turn off System link stop (SB0003).