02-01-2013 02:23 PM
I have a labview program that cycles some adhesion samples. I use the DAQ assistant to collect data on the bond length of 6 samples which I measure with some LVDT's that I have wired to a compact DAQ cDAQ9172. The LVDT's are wired into 2 9215 modules on the compact DAQ. There is a seventh LVDT that measures the actual displacement of an actuator that displaces the adhesion samples. I have the LVDT's set up as voltage inputs in the DAQ assistant along with 1 additional imput that is a temperature (thermocouple input) that monitors the temperature in the chamber the samples are in. The thermocouple is wired to a 9217 module on the DAQ.
I recently added 6 load cells to monitor the load in my test station, I wired them into 2 9237 modules on the compact daq. I opened the DAQ assistant and added 6 additional channels like the settings below. I can run the task and I pick up the signals just fine. The problem is when I select Signal I only see channels 0 through 7. I would not be surprised if I missed a step because it has been a few years since my last programming adventure. Can anyone point out what is wrong?
Channel Settings | Order | Physical Channels | Device Type | |
Voltage | LVDT1 | 0 | CDAQ1Mod2/A0 | NI9215 |
LVDT2 | 1 | CDAQ1Mod2/A1 | NI9215 | |
LVDT3 | 2 | CDAQ1Mod2/A2 | NI9215 | |
LVDT4 | 3 | CDAQ1Mod2/A3 | NI9215 | |
LVDT5 | 4 | CDAQ1Mod3/A0 | NI9215 | |
LVDT6 | 5 | CDAQ1Mod3/A1 | NI9215 | |
LVDT7 | 6 | CDAQ1Mod3/A2 | NI9215 | |
Thermocouple | Temperature | 7 | CDAQ1Mod1/A0 | NI9217 |
Custom Voltage | LoadCell1 | 8 | CDAQ1Mod4/A0 | NI9237 |
LoadCell2 | 9 | CDAQ1Mod4/A1 | NI9237 | |
LoadCell3 | 10 | CDAQ1Mod4/A2 | NI9237 | |
LoadCell4 | 11 | CDAQ1Mod4/A3 | NI9237 | |
LoadCell5 | 12 | CDAQ1Mod5/A0 | NI9237 | |
LoadCell6 | 13 | CDAQ1Mod5/A1 | NI9237 |
02-04-2013 04:53 PM
Hello
You need to run your VI once. Wire the Select Signals express VI to your DAQ Assistant and run the VI once (this allows the signal names to propegate).
Check this forum:
Regards