Instruction manual

4-44 1. Ethernet
Server Communication Procedure
Data Request from ZM-300 to Server
(1) Execute the receive wait thread using
“int HKEtn_RecvFrom()” on the
application of the server.
(2) Send the command from the ZM-300
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 ZM-300 series
PLC Data Request from Server to ZM-300
(1) A request is sent from the
application of the server to the
ZM-300 series. Use “int
HKEtn_ReadPlcMemory()” for a
memory request.
(2) (3) The ZM-300 series reads the PLC
memory.
(4) The ZM-300 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
ZM-300 series
Server
Application
ZM-300 series
Server
Application