String transfer from CompactLogix to Micrologix

[wilkerson29847]

I wanted to add something to this as I was in error again with my previous statement.

When I said I took out the SWP that I had on the ML end and it worked, I was wrong again. I but the SWP back in and it only works if I trigger the SWP instruction separately, with a different bit. If I leave the SWP with no separate trigger bit I get the value of 011673551090 instead of the original string value of 106137550109.

 

[drbitboy]

it needs to be swapped exactly once, immediately after each new transfer of data.

Or you could never swap the data MSGed from the CompactLogix, and instead BOTH CPW those MSGed data (N7:51,length=41) to the string (.DATA[0],length=41), AND swap the string .DATA on every scan. CPU cycles are cheap.

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