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4-44 1. Ethernet
Server Communication Procedure
Data Request from V7 to Server
(1) Execute the receive wait thread using
“int HKEtn_RecvFrom()” on the
application of the server.
(2) Send the command from the V7 series
to the server using macro command
SEND.
(3) The server analyzes the command
and takes the appropriate action.
User data format
Transfer from the V7 series
PLC Data Request from Server to V7
(1) A request is sent from the
application of the server to the V7
series. Use “int
HKEtn_ReadPlcMemory()” for a
memory request.
(2) (3) The V7 series reads the PLC
memory.
(4) The V7 series returns data read
from the PLC memory to the
server.
Item Bytes
Packet bytes
2+2+1+n bytes
2
Transaction No. 2
Command (0x33) 1
User data n
<PLC>
Ethernet
(1)
(2)
(3)
SEND
(3)
V7 series
Server
Application
<PLC>
Ethernet
(1)
(2) (3)
(4)
V7 series
Server
Application