Mitsubishi Electric Q06CCPU-V, Руководство пользователя

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5
- 6 5.2 CC-Link Module Access Function
5.2.1 Block data assurance per station
5
ACCESS VIA NETWORK MODULES
POINT
When any of the following operations is performed for the CC-Link module for
which the block data assurance per station is enabled, cyclic data are
automatically refreshed even if the QBF_RefleshLinkDevice function is not
executed.
• Monitoring on the Module monitoring tab of C Controller setting utility
• Monitoring in Device monitoring utility
• Device reading from another user program (another task) with the
QBF_FromBuf function (automatic refresh method) or a MELSEC data
link function
Note that the write (send) area of the link refresh device (in the buffer memory) is
not refreshed.
Also, cyclic data are not refreshed when monitoring is performed with another
station's CC-Link module specified in Device monitoring utility.
Remark
Use the manual cyclic data refresh method if user program processing is to be
continued during the waiting time which will occur in the automatic cyclic data
refresh.
(4) How to write cyclic data (to the buffer memory)
Cyclic data can be written to the buffer memory using the block data assurance per
station, by one of the methods described below.
If any other method is used, integrity of cyclic data for each slave station is not
guaranteed.
1) Enable the bock data assurance per station in CC-Link utility.
2) Use either of the following methods.
Table 5.4 Writing cyclic data (to the buffer memory)
Method Description See
Automatic cyclic data
refresh
Only by executing the QBF_ToBuf function, data are
written and automatically refreshed (in the next link
scan).
(a)
Manual cyclic data refresh
Data are written with the QBF_ToBuf function, and then
they are manually refreshed by executing the
QBF_RefreshLinkDevice function.
(b)