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UDP/IP Socket Interface:
To use UDP/IP transmission, it is necessary to create a small program in the S2T. The
program will utilize the SEND and RECV instructions. The general procedure is as follows:
1. Execute UDP socket open: The Specified Port number must be different from the Port
number for T-PDS connection. If the Port number for T-PDS is 2000, the Port number for
UDP socket must be other than 2000 to 2002. It is recommended that 2 UDP sockets be
opened. One for data send and one for data receive respectively.
2. Execute UDP send and/or UDP receive to exchange data via Ethernet.
3. UDP socket close.
The instruction information on these functions is shown as follows.
UDP Socket Open: SEND instruction is used. ▬[ A SEND B ]▬.
A: H3100 (fixed) B: Result status
A+1: UDP open command (H0031) B+1: Error code
A+2: Socket number (1 to 12)
A+3: UDP Port number
Sample Program
12544 = H3100
49 = H0031
Socket number =1
Port number = 4000
When R0620 is set to ON, the UDP open operation is executed. When the operation is finished
R0620 is reset to OFF automatically.