Mitsubishi MELSEC-Q Series User Manual page 149

4
FUNCTIONS
(3) Reduction of link device refresh time
The link device refresh time can be shortened by reducing the number of refresh
points to the C Controller module, setting proper refresh parameters/network range
assignment parameters and making direct access to the link devices.
(a) Concept of refresh range (points)
Range set by
refresh
parameters
POINT
The ranges set with the refresh parameters from the <<Parameter settings>> tab
of the CC IE Control utility and also set in Network range assignment are
refreshed.
C Controller module
Internal link
device buffers
Range to be
actually
refreshed
Applicable
as internal
memory
Applicable
as internal
memory
Applicable
as internal
memory
Figure 4.60 Concept of refresh range
The range from the first to the last addresses is set as the initial setting of the
refresh parameters (Clicking the Default button on the Refresh parameter settings
screen activated from the <<Parameter settings>> tab of the CC IE Control utility
brings it back to the initial setting).
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 parameter
Station
Link device
refresh No.1
(Empty)
Station
Link device
No.2
refresh
(Empty)
Link device
Station
refresh
No.3
1
2
3
Range set by
network range
assignment
4
5
6
7
8
4
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