Mitsubishi Electric Q12DCCPU-V - Write Operation

5
ACCESS VIA NETWORK MODULES
5.2 CC-Link Module Access Function
5.2.1 Block data assurance per station
5 - 9
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK MODULES
6
PREPARATORY PROCEDURES AND SETTING
7
I/O NUMBER ASSIGNMENT
8
MEMORIES AND FILES
• If data writing is attempted before completion of the refresh after execution of
the QBF_RefreshLinkDevice function, the data will be not written until
completion of the previous refresh.
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.
• Forced writing to the buffer memory on the Module monitoring tab of C
Controller setting utility
• Device writing in Device monitoring utility
• Device writing from another user program (another task) with the
QBF_ToBuf function (automatic refresh method) or a MELSEC data link
function
Note that the read (receive) area of the link refresh device (in the buffer memory)
is not refreshed.
Also, cyclic data are not refreshed when device writing is performed with another
station's CC-Link module specified in Device monitoring utility.
Remark
For CC-Link utility, refer to the following.
C Controller Module User's Manual (Utility Operation, Programming)
Figure 5.9 Write operation
Buffer memory
Link scan
C Controller module CC-Link module
Link scan
QBF_ToBuf function (Manual) 1)
: User program is in standby state.
Link scan
Refresh request
Refresh
(Data 1))
Refresh
(Data 2))
QBF_RefreshLinkDevice function
QBF_RefreshLinkDevice function
QBF_ToBuf function (Manual) 2)
Refresh request
User program