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3. The PLC IP address is configured using software tool BOOTPServer.

4. When the main SCADA is running, applications like KEPServer should be running in the background and PLC should be in online mode.

5. Using SCADA, a graphical user interface (GUI) is built to monitor and control various parameters like current/voltage and to switch on/off various devices.

Fig. 6: Interfacing the PLC via the Ethernet to a PC to make it available to software for configuration and programming
Fig. 6: Interfacing the PLC via the Ethernet to a PC to make it available to software for configuration and programming
Fig. 7: Setting BOOTP server properties
Fig. 7: Setting BOOTP server properties
Fig. 8: Pinging to check if PLC connection is established
Fig. 8: Pinging to check if PLC connection is established
Fig. 9: AWA instruction set
Fig. 9: AWA instruction set
Fig. 10: SCL instruction set
Fig. 10: SCL instruction set

Selection of Allen Bradley PLC by Rockwell Automation

E8Z_TableFor a beginner, it is better to start with the MicroLogix family of PLCs from Allen Bradley. MicroLogix 1000 controller offers control capabilities in an affordable, compact package. MicroLogix 1200 provides features and options to handle an extensive range of applications. The expandable MicroLogix 1500 controller helps you achieve high-level control in a variety of applications. MicroLogix 1100 and MicroLogix 1400 controllers increase application coverage with enhanced network communications at affordable prices. RSLogix 500 programming software and RSLogix Micro programming software provide an instruction set that is common to MicroLogix and SLC 500 controller families.

MicroLogix 1000 PLC system. MicroLogix 1000 PLC (Fig. 2) is available in 10-point, 16-point or 32-point digital input/output (I/O) versions. Analogue versions available with 20 digital I/O points, four analogue inputs (two voltage and two current) and one analogue output (configurable for either voltage or current) provides a compact form factor, with footprints as small as 120mm x 80mm x 40mm (4.72 x 3.15 x 1.57 inches).

It offers fast processing with typical throughput time of 1.5ms for a 500-instructions program and has a pre-configured 1kB program and data memory to ease configuration. It includes built-in EEPROM memory; hence, there is no need for battery back-up or a separate memory module.

The device offers peer-to-peer messaging (up to 32 controllers on a DH-485 network) through a 1761-NET-AIC communication interface. Communication takes place via DeviceNet and EtherNet/IP through 1761-NET-DNI and 1761-NET-ENI communication interfaces.

It also includes a built-in high-speed counter (only on controllers with 24V DC inputs) and lets you customise input response times and noise rejection using adjustable DC input filters.

The device supports simple connectivity through an RS232 communication channel to a PC for program upload, download and monitoring.

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4 COMMENTS

  1. Hi,
    This is very good forum for me to learn a lot about Automation and instrumentation. I just wanna ask that if u can provide PDF files of projects so we can learn from them and make similar projects in our student activities and professional life as well. Hope u will take it seriously.

    • Dear Rao Talha, for every hardware and software project we provide PCB and component layout PDFs and source code (If any) within the article.

  2. It woulde be easy & better to understand for all if a you post a step by step video showing a simple thing like on/off a motor by using GUI button of Wonderware through Allen Bradley PLC using KEPSersver.

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