LabVIEW
rs485
First bit of advice is to fix the code you posted as PNT was talking about in message 5. Your use of local variables will cause race conditions. In all likelihood, a copy of the local variable will be used to calculate a piece of string before the local variable gets written to. It will either be the default value, or a stale value from a previous iteraiton of the loop. Get rid of all the local variables in that event structure and pass the data from one area of the code to another by way of wires.
I see in the top right you have a constant set for big endian. But the document mentions that the words are little endian. I'm not even sure why you are using the flatten to string function there anyway. You are passing in a string. I think between that and the big-endian/little endian, you are completely scrambling things in ways you don't want to, or possibly doing nothing at all.
Start from the beginning, just build the strings using the available functions to see if they are being built the way the document calls for. Nothing fancy, just concatenate. Do not use the build array that you have coming out of the HDR function array that does nothing. (A few other spots as well.) Be careful of your naming conventions. You have MSB LSB as well as msb and lsb. That could confuse you as to where those values are supposed to go.
Also odd is your checksums where you are operating on each byte individually. The document looks like the checksums operate on words at a time. By operating on bytes at a time, you may miss have the least significant byte roll over into the MSB when doing the summing of U16 values.
There are a lot of code problems here that would best be solved by scrapping all of your code and starting again.
