Specifications Of The Link Data Sending/Receiving Processing Time; Link Data Sending/Receiving Processing - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

3 SPECIFICATIONS

3.3 Specifications of the Link Data Sending/Receiving Processing Time

3.3.1 Link data sending/receiving processing

1)
X0
B0
Sending station
QCPU
B
Sequence scan
2)
Device
memory
storage area
Link refresh
1
3 - 29
This section explains the link data sending/receiving processing time and how to
calculate the data link transmission delay time in the MELSECNET/H network system.
(1) Overview of the sending/receiving processing
In the cyclic transmission, communication is performed using the LB/LW/LX/LY
devices of the network module.
This section explains the case when the link relay (B) is used on the CPU module
side.
1) B0 on the sending station turns on.
2) By a link refresh, the B0 information is stored in the refresh data
storage area (LB) of the network module.
3) The B0 information in the refresh data storage area (LB) is stored in
the link data storage area (LB).
4) By a link scan, the B0 information in the link data storage area (LB) is
stored in the link data storage area (LB) of the network module on the
receiving station.
5) The B0 information in the link data storage area (LB) is stored in the
refresh data storage area (LB).
6) By a link refresh, the B0 information is stored in the device memory
storage area (B) of the CPU module.
7) B0 on the receiving station turns on.
Network module
LB LB
3)
Refresh data Link data
storage area storage area
2 3
1: Sets the values with the refresh parameters.
2: Sets the values with the station inherent parameters. (If the settings are not made, the
values of the common parameters are stored as is.)
3: Sets the values with the common parameters of the control station.
Network module
LB
4)
Link scan
5)
Link data
storage area
3
MELSEC-Q
7)
B0
Receiving station
QCPU
LB
Sequence scan
6)
Device
Refresh data
memory
storage area
storage area
2
Link refresh
1
Y10
B
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