Link Data Send/Receive Processing Time Specifications; Link Data Send/Receive Processing - Mitsubishi Electric QJ71LP21 Reference Manual

3 SPECIFICATIONS

3.3 Link Data Send/Receive Processing Time Specifications

3.3.1 Link data send/receive processing

X0
Y1000
Remote master station
QCPU
Y
Sequence scan
Device
2)
memory
storage
area Link
refresh
1
1: Set by network refresh parameters.
2: Set by remote master station common parameters.
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The following introduces the method of calculating link data send/receive and
transmission delay time in the remote I/O network.
(1) Summary of send/receive processing
Cyclic transmission of the remote I/O network communicates by network module
LX/LY/LB/LW.
(a) For input module
The following is an example of CPU module side output (Y).
1) Remote master station Y1000 is on.
2) Y1000 data is stored in the network module refresh data storage area
(LY) by link refresh.
3) The Y1000 data in the refresh data storage area (LY) is stored as Y0 in
the link data storage area (LY) according to the common parameters.
4) The Y10 data in the link data storage area (LY) is stored in the link data
storage area (LY) for the remote I/O network module by link scan.
5) The Y0 data in link data storage area (Y) is stored in refresh data
storage area (LY).
6) The Y0 data is output from the output module of the remote I/O station
by the automatic refresh operation of the network module.
1)
Network module
LY
Refresh data Link data
3)
storage area storage area
2
LY
4)
Link
scan
Link data
storage area
2
Remote I/O station
Network module
LY LY
Refresh data
5)
storage area
2 2
MELSEC-Q
Output module
Y0
6)
I/O
refresh
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