I am trying to use one of my cDAQ-9139’s with an NI 9361 and 2012 LabVIEW to measure 4 things: the (1) period and (2) pulse width of a signal from a 3-wire PNP proximity switch and the (3) period and (4) pulse width of a signal from another identical proximity switch. I am using the DAQ Assistant to do this.
When I configure the DAQ Assistant to measure either (1) and (2) or to measure (3) and (4), everything works: therefore I can measure the period and pulse width coming from one sensor. However, when I try to configure the block to measure all 4, I get erratic behaviors in the measurements. Is there some limitation on using a cDAQ-9139 + NI9361 + 2012 LabVIEW to measure two periods and/or two pulse widths simultaneously?