Link Refresh - Mitsubishi Electric MELSEC-Q Series User Manual

8.3.2 Link refresh

Data can be automatically transferred between the link devices of the Simple Motion module
and the devices of the CPU module.
CPU
module
Device
(1) Concept of the link refresh range
(2) Shortening the link refresh time and transmission delay time
(3) Setting method

Link refresh

The area range set with the refresh parameters and also specified in the network
configuration settings is executed by link refresh.
Actual link
refresh range
Range set by
refresh parameters
Use the following methods to shorten time mentioned above by reducing the number of
link refresh points of the CPU module.
• In the refresh parameters setting, set only the link devices used in the CPU module as
the link refresh range. (Refer to Section 7.6.)
• Directly access infrequently used link devices from the program, and remove the
corresponding settings from the link refresh range. (Refer to Section 8.3.3.)
The link refresh is assigned by the Refresh Parameters. (Refer to Section 7.6.)
Simple Motion
module
Link
device
RX
RY
RWr
RWw
CPU module
Device
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Chapter 8 FUNCTIONS
Simple Motion module
Link device
Link refresh
Empty
Link refresh
Empty
Link refresh
Range set in
the network
configuration
setting