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Found 4 results

  1. How do you test PLC logic?

    We have been working with PLCs for long time. We used to develop PLC logic, partly test it on an emulator and test the rest on the partly energised equipment. From time to time working with computer software development (C# and JavaScript) I was always looking for something similar to unit testing in the PLC world. As I couldn't find anything at that time I've started developing own automated testing tool. Now we use this tool, which basically simulates PLC inputs in defined actions and checks expected behaviour of internal tags or/and PLC outputs. If it behaved the way we expected, it's PASS, otherwise it's FAIL. We break complex logic into small parts and create unit tests for it. By creating more of these unit tests we can test PLC logic of any complexity. The software called PLC Logic Prover and it's free at https://www.controlx.io Recently, I've been told that there is no point to develop anything new if there are already great tools on the market. Honestly, I didn't do proper research earlier, so I'm here asking the experts. What do you use to test PLC logic? What automated testing tools do you use? Is it using IO simulation or it can test logic by other means? Your replies are appreciated. Thanks, Alex
  2. http://accautomation.ca/plc-programming-example-process-mixer/ Factory IO provides a 3D simulation of the process. Testing of the program is important and should be done in a variety of ways. Factory IO provides a straight forward method of seeing your program in action before you wire your application. The above URL link will take you to our example process mixer. We use Factory IO to simulate the application. Factory IO will communicate Modbus TCP to the PLC. Factory IO Website is at the following URL: https://factoryio.com/ Documentation is well done. Start at the ‘Getting Started’ at the following URL: https://factoryio.com/docs/ You can get a free 30 day trial at the above address. Regards, Garry
  3. AB PLC Authentication

    Hi I have an AB PLC 1769 Compact I/O Module bought from a different supplier (not from Rockwell), now I want to confirm the authenticity of the same. Could you please help to find the ways to test its authenticity? Thanks
  4. Hello!! I am a beginner in PLC and Automation. I have built a ladder logic program in RSLogix 5000, the controller I selected is 1756 L62 ControlLogix 5562. I want to test my logic. I have installed RSLinx Classic Lite already. Can I use RSLogix Emulate 500 (free downloadable from Rockwell Automations) for testing my ladder logic?