Are you a newcomer working on a project involving a PLC CP1L Omron and CX Programmer for programming? In this project, you'll be using a Scanner as input, with the PLC receiving data in D100. Your goal is to store 10 data points in the PLC Memory and then display them on an HMI. To ensure efficiency, the data will move in a FIFO manner whenever new data is input from the scanner. The new data from the scanner will be compared to the 10 previous data points, and if any duplicates are found, the PLC output will be activated. Need assistance in problem-solving? Let us help you out. Thank you.
If the data is in string format, it will occupy a register for every two characters. For example, a ten-character string will require five registers. To transfer this data, you may need to use XFER, a block transfer function. In the case of Omron, it may require six registers for a 10-character string due to formatting requirements. This transfer process operates similarly to a shift register, moving data in blocks of 5 or 6 registers.
Absolutely! I have recently started working with PLC and CX Programmer, so I appreciate the assistance. Specifically, Iām finding it quite challenging to implement the logic for duplicate data detection. Any best practice or step-by-step guide you could share would be super beneficial. Thanks a lot for reaching out!
Absolutely! Working with PLCs can be challenging, especially for a novice. You've got a good grasp on how your system is supposed to work end-to-end. For the FIFO data management and comparison to the current scanner input, consider creating a structured ladder logic or perhaps a sequential function chart in your CX-Programmer. Keep an array of 10 registers for storing your data, then use a combination of MOVE and SHIFT registers commands after each scan. For the duplicate check, you could use a looping structure to compare the new data from the scanner to all the elements in your array. Remember, troubleshooting is part of the process and it'll get easier as you go along!
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Answer: - You can use the FIFO method to store data points in PLC memory and compare new data with the previous 10 data points. Any duplicates found can activate the PLC output.
Answer: - The Scanner is used as an input device, sending data to the PLC for storage and comparison.
Answer: - You can display the 10 stored data points on an HMI interface for monitoring and visualization.
Answer: - By implementing a FIFO (First In, First Out) method, you can ensure that new data points are stored and compared in an organized manner within the PLC memory.
Answer: - You can ask for help and guidance from experienced individuals or forums specializing in PLC programming and CX Programmer to troubleshoot any issues you encounter during the project.
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