Mitsubishi MELSEC-Q Series User Manual page 151

4
FUNCTIONS
C Controller
module
User program
Processing to be written constantly
(Link device used frequently)
Processing to be written when
necessary
(Link device not frequently used)
Processing to be read constantly
(Link device used frequently)
Processing that performs read
when necessary
(Link device not frequently used)
2) Method using direct access
By using direct access for link devices that are less frequently used on its own
station and excluding those link devices from the link device refresh range, the
link device refresh time can be reduced.
C Controller
module
Internal link device
buffers
Internal
buffer access
Internal
buffer access
Figure 4.62 Reduced link device refresh time
4.5 CC-Link IE Controller Network Module Access Function
4.5.5 Link data send/receive processing time specifications
CC-Link IE controller
network module
Network range
assignment parameters
Link device
refresh
Direct access
Link device
refresh
Direct access
1
2
Range of
transmission to
other station
3
Range of reception
from other station
4
5
6
7
8
4
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