7 CC-Link IE Field Network Basic FUNCTION
7.1 Cyclic Transmission Function
133
7
Data transitions of cyclic transmission
The following figure shows the data transitions of cyclic transmission when a group number is set.
■
Basic operation
The master station sends requests, that vary from a group to group, to all salve stations. The slave stations receive multiple
request messages from the master station; however, each slave station handles a request message for a group where each
slave stations belong to.
After the link scan time set for each group elapsed, the master station starts sending another request to the group. Since the
link scan setting can be configured for each group, the setting can be configured according to the response processing times
of each group. (
The master station sends requests to the slave station 1 and slave station 2 that belong to group 1.
The slave station 1 returns a response to the master station.
The slave station 2 returns a response to the master station.
After the link scan time set to the group 1 is elapsed, the master station starts sending another request.
The master station sends a request to the slave station 3 that belongs to group 2.
The slave station 3 returns a response to the master station.
After the link scan time set to the group 2 is elapsed, the master station starts sending another request.
Setting method
Group numbers can be set in "Network Configuration Settings". (
Page 139 Network configuration settings)
Lst1: Link scan time of group 1 (link scan)
Lst2: Link scan time of group 2 (link scan)
(1) Group No.1
(2) Group No.2
(3) Master station 1
(4) Slave station 1
(5) Slave station 2
(6) Slave station 3
Ò
Ò
Ò
Ó
Ó
Ô
Ô
Ö
×
Lst2
Lst2
Lst2
Lst1
Lst1
Õ
Õ
Ö
×
Ø
Ø
(3)
(4)
(5)
(6)
(1)
(2)
Summary of Contents for MELSEC iQ-R C R12CCPU-V
Page 1: ...MELSEC iQ R C Controller Module User s Manual Application R12CCPU V ...
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Page 23: ...1 EXECUTING PROGRAMS 1 3 I O Access Timing 21 1 MEMO ...
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