138 Ethernet module User’s Manual
Chapter 6 Socket Interface Communication
6
6.5.2 TCP socket sample programs
Two EN311 modules are mounted, one to Slot 6 and another to Slot 7 on the base. The
program for each module is to be registered as separate program.
• Transmission is performed via Slot 6, Socket 1 (Port number = 4000) ••• Active open
(timeout is 30 seconds) Æ Send Æ Close first
• Reception is performed via Slot 7, Socket 1 (Port number = 4001) ••• Passive open
(timeout is 30 seconds) Æ Receive Æ Close when RCLOSE is set to 1
• Number of send/receive words: 100 words
• Socket status address of Socket 1: 16 # 7E47 (word address)
(1) Initialization routine
Slot 6 Local station IP address: 133.113.90.10
Local station message transmission UDP port number: 4000
Slot 7 Local station IP address: 133.113.90.20
Local station message transmission UDP port number: 4001
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