Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
502 Socket Interface Using CIP Generic Messaging
• 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.
N file for receiving contains: 12 bytes + n bytes
Nx:0 Nx:1 Nx:2, Nx:3 Nx:4 Nx:5 Nx:6…
FromAddr
Family
(2 bytes)
FromAddr
Port
(2 bytes)
FromAddr
IP Address
(4 bytes)
BufLen
(2 bytes)
Reserved
(2 bytes)
Buf
(n bytes)
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
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes