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8.2.2 Link refresh
Data can be automatically transferred between the link devices of the master/local module and the devices of the
safety CPU module.
(1) Concept of the link refresh range
The area range set with the refresh parameters and also specified in Network Configuration Setting is executed
by link refresh.
(2) Shortening the link refresh time and transmission delay time
Use the following method to shorten time mentioned above by reducing the number of link refresh points of the
safety CPU module.
• In the refresh parameters setting, set only the link devices used in the safety CPU module as the link refresh
range. ( Page 86, Section 7.5)
(3) Setting method
The link refresh is assigned by the Refresh Parameters. ( Page 86, Section 7.5)
(4) Precautions
For cyclic data assurance of more than 32 bits, use one of the following methods.
• Enable the Block Data Assurance per Station setting. ( Page 81, Section 7.3, Page 108, Section 8.2.3
(2))
• Create an interlock program. ( Page 109, Section 8.2.3 (3))
Safety CPU module
Device
RX
RY
RWr
RWw
Link refresh
Link
device
Master/local odule
Safety CPU module
Device
Range set by
refresh parameters
Master/local module
Link device
Link refresh
Link refresh
Link refresh
Empty
Empty
Actual link
refresh range
Range set in
the network
configuration
setting