Greetings, I am a beginner in ladder logic and PLC programming using Rockwell's Studio 5000 Logix Designer. I am facing an issue while attempting to convert two 16-bit integer values to a DINT using BTD commands. Despite receiving new sensor data in my 16-bit INTs, the DINT in the BTD destination remains unchanged when connected to the PLC. I have integrated a JSR command in my main code to run the sub-routine. For further assistance, please refer to the attached screenshot of my code. Thank you.
As someone relatively new, please consider this suggestion with caution. To achieve your goal, consider using a Control Output (COP) with the source set to ZXM:I.Data[26] and the destination set to ZMX_Volume_Dint. When setting the length, remember that it refers to the destination element. Since a dint is 32 bits long, the instruction will copy 32 bits starting from element 26.0 and ending at 27.15.
In order to convert a DINT to a floating point number, it is recommended to use a MOV instruction. While the Copy function duplicates elements, MOV is specifically designed to transfer a value. This distinction is crucial for proper data conversion in PLC programming.
It is essential that your length is set to 1 instead of 32. When using COPY, the size of the destination type determines how many bytes are copied from the source.
The evaluation of BTD instructions and the rungs they are on are not being assessed, assuming they are live and concurrent values in post #1. There are several methods to visually confirm if a rung is being evaluated within the 5000 online IDE. One effective technique is to increment an unused REAL by 1 (ADD heartbeat 1.0 heartbeat). After approximately 105 or 106 scan cycles, you may notice that the value no longer increments. By this point, you should have gathered the necessary information, or you can manually reset the REAL value.
Hey there, I had a look at the screenshot of your code and I think the issue might be due to the order of execution of your code lines. In ladder logic, it matters where you place your BTD operation in relation to your sensor data acquiring lines. Make sure you've properly configured your coding sequence such that you retrieve your sensor data prior to using the BTD command. This should ensure that you're not trying to convert to DINT before the new sensor data has been captured. Another point, double-check that the JSR command correctly points to the subroutine where the BTD instruction is, and make sure it gets executed after the data acquisition. Hope this helps!
From the screenshot of your code, it looks like you need to check your Condition routine triggering the BTD conversion. If it’s not triggered properly, the conversion won't occur, leaving your DINT value unchanged. Also, ensure your input registers are correctly mapped as it might be the reason for not getting updated data into INTs. As a beginner, it's easy to overlook these small details, so no worries! Stick with it - PLC programming has quite a learning curve, but the versatility it offers is well worth the effort.
From your description, it sounds like your issue might be with the data handling part of your program. You might be doing the correct operation but the values getting from sensor are not loaded properly. Double-check your sensor data acquisition and ensure the values are correctly loaded into your 16-bit INTs. Also, try reviewing the BTD command syntax and operand usage, as these could be potential areas where something is going awry. I'd also suggest checking the execution order of your sub-routines, perhaps the one containing your BTD operation is not being executed as expected. Keep troubleshooting, it may take a bit of time but I'm sure you'll get it!
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Answer: Answer: This issue could be due to various reasons such as incorrect BTD command usage, data type mismatches, or errors in the sub-routine logic. Double-check your code to ensure the correct conversion and data flow.
Answer: Answer: To troubleshoot this issue, you can review your ladder logic, check for any conditional statements affecting the data update, verify the JSR command is calling the sub-routine correctly, and confirm the data type compatibility between the source and destination.
Answer: Answer: Ensure that the BTD command is correctly configured to convert the 16-bit INTs into a DINT, verify that the sensor data is being properly received and passed to the conversion block, and confirm that the output is correctly linked to the PLC for updating the destination value.
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