Allen Bradley 1785-Rockwell Automation

Allen Bradley 1785-Rockwell Automation

The Rockwell / Allen-Bradley 1785 Series PLC-5 Processors are a chassis-based,

modular family that offers the user flexibility in programming, networking, I/O and choice of controllers to match the users exact requirements. Well-suited for many diverse applications, the PLC-5 controller brings together existing and future systems by means of networks such as EtherNet/IP, ControlNet and DeviceNet, and offers connectivity among MicroLogix, SLC 500, and ControlLogix controllers. Key features of the EtherNet/IP are information layer, high-speed exchange of information, high bandwidth, and ability to use over the Internet. ControlNet key features include control layer, transfers I/O and program data, high-speed, and deterministic. Whereas, DeviceNet key features are device layer, open standard, and directly connects low-level devices. With the flexibility to grow with the user’s needs without the user having to sacrifice capital on training investments, the PLC-5 controllers will continue to maintain their value in the years ahead.

Product Family: 1785-L11B, 1785-L20B, 1785-L30B, 1785-L40B, 1785-L40L, 1785-L60B, 1785-L80B

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Allen Bradley 1785-Rockwell Automation

Classic PLC5 Family Processor Features
From the family of PLC-5 processors, you can choose the processor(s) that you need for your application. Features common to all Classic PLC-5 processors are:
1.same physical dimensions use of the left-most slot in the 1771 I/O chassis can use any 1771 I/O module in the processor-resident local I/O chassis
2.with up to 32 points per module same programming software and programming terminals
3.same base set of instructions
4.ladder programs and SFCs can be used by any of the PLC-5 processors
Check with your Allen-Bradley sales office or distributor if you have questions regarding any of the features of your PLC-5 processor.
Subprogram Calls
Use a subroutine to store recurring sections of program logic that can be accessed from multiple program files. A subroutine saves memory because you program repetitive logic only once. The JSR instruction directs the processor to go to a separate subroutine file within the logic processor, scan that subroutine file once, and return to the point
of departure.
For detailed information about how you generate and use subroutines, see your programming software documentation set.
Sequential Function Charts
Use SFCs as a sequence-control language to control and display the state of a control process. Instead of one long ladder program for your application, divide the logic into steps and transitions. A step corresponds to a control task; a transition corresponds to a condition that must occur before the programmable controller can perform the next control task. The display of these steps and transitions lets you see what state the machine process is in at a given time.
For detailed information about how you generate and use SFCs, see you programming software.
Ladder Logic Programs

A main program file can be an SFC file numbered 1-999; it can also be a ladder-logic file program numbered 2-999 in any program file.