1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

502 Socket Interface Using CIP Generic MessagingN file for receiving contains: 12 bytes + n bytesNx:0 Nx:1 Nx:2, Nx:3 Nx:4 Nx:5 Nx:6…FromAddrFamily(2 bytes)FromAddrPort(2 bytes)FromAddrIP Address(4 bytes)BufLen(2 bytes)Reserved(2 bytes)Buf(n 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.WriteThe Write service sends data on a socket. You can specify the number ofbytes to send. The Write service attempts to send the requested number ofbytes and returns the number of bytes sent.ParameterValueService TypeWriteService Code4E (hexadecimal)Class342 (hexadecimal)Instance0. Use a relay ladder instruction to move the returnedinstance number from a CreateSocket service into theMGx:y.TFN element of a MSG instructionAttribute 0Publication 1766-RM001A-EN-P - October 2008