Allen-Bradley MicroLogix 1400 Instruction Manual page 504

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502 Socket Interface Using CIP Generic Messaging
Publication 1766-RM001A-EN-P - October 2008
N file for receiving contains: 12 bytes + n bytes
Nx:0 Nx:1
FromAddr FromAddr
Family Port
(2 bytes) (2 bytes)
• Structure of FromAddr :
• Family : Contains the address family. Must be 2.
• Port : Contains a local port number.
• Addr : Contains an IP address.
• BufLen : Contains the number of bytes of data received.
• Buf : Contains the data.
Write
The Write service sends data on a socket. You can specify the number of
bytes to send. The Write service attempts to send the requested number of
bytes and returns the number of bytes sent.
Parameter Value
Service Type Write
Service Code 4E (hexadecimal)
Class 342 (hexadecimal)
Instance 0. Use a relay ladder instruction to move the returned
instance number from a CreateSocket service into the
MGx:y.TFN element of a MSG instruction
Attribute 0
Nx:2, Nx:3 Nx:4 Nx:5
FromAddr BufLen Reserved
IP Address (2 bytes) (2 bytes)
(4 bytes)
Nx:6...
Buf
(n bytes)