We have (2) USB-1024LS I/O devices connected to a Win7 Pro PC.
Boards are configured as board 0 and board 1 thru InstaCal.
Inputs are configured as (24) digital inputs.
When connected separately, each board works correctly thru TraceDAQ.
a0 is input 0
a1 is input 1
...
b0 is input 8
...
c0 is input 16
...
c7 is input 23
However, when both boards are connected, the inputs on board 0 get offset by 2:
a0 is input 2
a1 is input 3
...
b0 is input 10
...
c0 is input 18
...
c5 is input 23
c6 is input 0
c7 is input 1
What are we doing wrong?
How can we correct it?
- Job Title: tech support
- Industry: IT
- Application: Digital I/O counting
100 months ago
nickdobrinich
Cleveland OH
Answers
We have tried this same setup, and it works OK. But we do see a possible cause for what you report. If you used the “AutoFill All” feature to add all 24 “Di” bits of each board, it may also have added a 25th channel, counter channel “Ci0”. This would cause the channels on the second board to shift one spot (not the two spots you report). To prevent this, before selecting AutoFill All, first select “Digital Input Only” rather than “All Supported”. If you still have an issue, please contact our Tech Support department, and they can review your .SCC configuration file and/or provide you with theirs.
100 months ago
Measurement Computing
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