1747-L552

1747-L552

The Allen-Bradley 1747-L552 processor is part of the Allen-Bradley SLC 500 series of controllers. The 1747-L552 provides users with the high-bandwidth network of the system, bringing 10 Mbps Ethernet connectivity to the popular SLC 500 series programmable controllers. In the C Series or higher, the 1747-L552 has been praised for its 64K user memory backup. In addition, it has a maximum user memory of 32K words (28K words for information or programming, 4K words for reference only). The processor has 4096 inputs and 4096 outputs. The 1747-L552 has a standard RAM and a flash backup memory. The 1747-L552 supports Ethernet communication speeds of 100 Mbps through auto-negotiation, increases Ethernet connectivity (1747-L552 has 48 connections), and provides HTTP server capabilities. The 1747-L552 has a built-in 10BASE-T Ethernet channel, enables 10 Mbps communication by supporting the TCP/IP protocol, and takes advantage of many widely available Ethernet devices and cables. Another important feature of the processor is the ability to program online on Ethernet using RSLogix 500 programming software, and the processor also supports Simple Network Management Protocol (SNMP) to manage your network. Through SLC 500 message instructions, 1747-L552 achieves high-speed point-to-point communication.

The controller refers to the main command device that changes the wiring of the main circuit or control circuit and changes the resistance value in the circuit to control the starting, speed regulation, braking and reverse of the motor in a predetermined order. It is composed of program counter, instruction register, instruction decoder, timing generator and operation controller. It is the “decision-making mechanism” that issues commands, that is, it completes the operation of coordinating and directing the whole computer system.