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In dealing with multiple projects and systems that each have different sets of tasks in MAX, I think it would be very handy if you could make virtual folders in the directory style listing under "NI-DAQmx Tasks" - that way you could folder up tasks by project or section of a project instead of having a long list of task names.
Anyone else think this would be helpful? or might it cause an issue in some way?
I recently had a customer create a global virtual channel in Measurement and Automation Explorer (MAX). They then set the maximum and minimum values for the input range of their signal.
My customer wanted to access the +2 and -2 values entered above and display them in LabVIEW. However, the property nodes for global virtual channels only accesses the limits of the board. For example, the customer's board may only be able to handle voltages between +/- 10 Volts. No matter which property node we chose... all that was returned was the +/- 10 Volt range. Could we please give customers access to this information?
Channel calibration in MAX is too limited to be very useful. According to NI AE, from MAX you can only create a table for calibration, not a polynomial fit. I assume intermediate values are linearly interpolated, but that wasn't specified. Programmatic calibration to enable polynomial cal as described in the above listed topic makes traceability problematic.
I propose that the channel calibration capabilities in MAX be amended to allow the user to select calibration mapping, either TABLE or POLYNOMIAL FIT.
OF course, the user should be able to select the polynomial order, and the R-value should be clearly indicated.
All of these properties should be included in any report generated from MAX.
I configure DAQmx channels, tasks, and scales as well as CAN messages and channels in MAX. It would be nice, if I could change the ordering of these elements after creation. It would also be nice to have an option to remove all configured channels (and tasks and scales) as well as CAN messages and channels, if I want to load the configuration of another project. Now I have to go to every section and delete the configuration by hand.
It would also be cool, if I could configure DAQmx variables in MAX, which I can use (write and read) in LabVIEW, too. E.g. I have a lot of tasks, which all use the same aquisition rate. If I have to change the rate, I have to change every task by hand. If I could use a variable, I just would change the variable. This would save a LOT OF WORK with huge DAQmx configurations.
Problem: When creating large numbers of virtual channels, the calibraton of these channels can be very time consuming and cumbersome. In large applications there can be literally hundreds of channels requiring days to calibrate.
Calibration equipment these days can be purchased with programmable capability or remote communication. Having low level functions available in Labview to calibrate MAX virtual channels programmatically would greatly reduce the time needed for calibration and reduce the potential errors of calibrating each point individually. It would also be useful to view the calibration data and scaling data from MAX in the Labview environment.