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MELSEC-Q
3 SPECIFICATIONS
3.3 Link Data Send/Receive Processing Time Specifications
The following introduces the method of calculating link data send/receive and
transmission delay time in the remote I/O network.
3.3.1 Link data send/receive processing
(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 master 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 Y0 data in the link data storage area (LY) is stored in the link data
storage area (LY) for the remote I/O 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 I/O refresh operation of the remote I/O module.
Refresh data
storage area
2
LY
Link data
storage area
2
LY
3)
LY LY
5)
Device
memory
storage
area
Y
2)
Link
refresh
1
6)
I/O
refresh
Y0
QCPU Master module Remote I/O module Output module
4)
Link
scan
Sequence scan
E
N
D
Remote master station Remote I/O station
1: Set by network refresh parameters.
2: Set by remote master station common parameters.
Y1000
X0
1)
Refresh data
storage area
2
Link data
storage area
2