Mitsubishi Electric Q81BD-J61BT11 User Manual page 93

4 FUNCTIONS
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(3) Link refresh
The link refresh is executed between the link device and the CC-Link Ver.2 board
driver buffer.
In order to execute the link refresh, set the block data assurance per station
setting and the link refresh cycle at <<Parameter settings>> ("Other settings"
screen) in the CC-Link Ver.2 utility. Refer to Section 8.2.5 (2).
Link refresh time is shown on "Board information" screen ("Board detail
information" screen) in the CC-Link Ver.2 utility. Refer to Section 8.2.2 (2).
However, link refresh is not executed when the board WDT error, or hardware
failure occurred, or data link has stopped.
POINT
(1) If the link refresh cycle is shortened, CPU utilization of the personal computer
may increase and load may become high.
(2) If the link refresh cycle is prolonged, the transmission delay time of the cyclic
data may increase.
(3) Depending on the following causes, the link refresh may not be executed as per
link refresh cycle set in the <<Parameter settings>> ("Other settings" screen).
Performance of a personal computer CPU is low
Too many link refresh points
Too many CC-Link Ver.2 boards has been installed
Overloading due to the other running applications
Overloading due to the other running boards
(4) When the link refresh time checked on the "Board information" screen ("Board
detail information" screen) is longer than the set link refresh cycle, take any of
the following actions.
Extend the link refresh cycle
Decrease the remote station points of the whole network
MELSEC
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