9. Program
●
Send/Receive message
Send message
Controller
Destination
device
**
**
Command data
**
**
**
Terminator
**
**
**
**
**
**
Receive message
(Response)
**
**
Response data
**
**
**
Terminator
**
**
**
**
**
**
Receive message
(Error response)
**
**
Response data (Error code)
**
**
**
Terminator
**
**
**
**
**
Header
Header
Header
●
Communications sequence
TCP communications are performed between the destination device (server) and the
Controller (client) in the following procedure.
Controller
(Client)
Accept
processing
Connection
established
Data receive
request
Data send
request
Next data
send request
Close
processing
Data receive
request
Next data
send processing
Data send
processing
Connection
established
Connection requested
Send data
Acknowledgement (ACK)
Send data
Acknowledgement (ACK)
Connect
processing
Close
processing
Connection
closed
Connection
closed
Destination
device
(Server)
33
Summary of Contents for V750 series
Page 51: ...9 Program 2 Initialization processing 48...
Page 52: ...9 Program 49...
Page 53: ...9 Program 3 Connect processing 50...
Page 54: ...9 Program 4 Send processing 51...
Page 55: ...9 Program 5 Receive processing 52...
Page 56: ...9 Program 53...
Page 57: ...9 Program 6 Close processing 54...
Page 58: ...9 Program 7 Processing number error process 55...
Page 60: ...9 Program Program 57...
Page 62: ...9 Program Program 59...
Page 64: ...9 Program Program 61...
Page 78: ...2013 0911 P543 E1 01...
