UE9 and Profilab
Posted 21 January 2010 - 12:36 PM
Posted 21 January 2010 - 05:40 PM
Use a DVM to measure the voltage from one of the IO to GND before and after you start the program. Do you see it change?
For some unknown reason, all the pumps start when i run this program.
The digital I/O have 3 possible states, as discussed in the middle of Section 2.9.0 of the UE9 User's Guide. Note that when set to input a line has a 100k pull-up to 3.3 volts, so it will set at about 3.3 volts if not loaded, but because of the high impedance cannot source much current.
Does the Labjack possess default HIGH state for the digital ios?
You can control the power-up default of the I/O. One easy way is the config defaults screen in LJControlPanel. From the factory, all I/O defaults to input at power-up.
In this case, when you run the program you are not powering-up, so I don't think that is exactly the problem. Try to figure out what the I/O are changing from and to, then we can try to figure out why an AIN read in Profilab is causing that.
Posted 22 January 2010 - 02:24 PM
Posted 25 January 2010 - 02:28 PM
Posted 23 May 2011 - 05:18 AM
Posted 23 May 2011 - 09:44 AM
If Profilab can't add support for the DACs, perhaps you could use Modbus/TCP to control them as it appears Profilab Expert supports modbus.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users