04-09-2012 01:52 PM
I am trying to combine two signals but i got an unexpected error when i combined a relay. I think I am missing something here and I have already tried everything...
Objective: The input data follows different ways depending on the switch. If its follows the first input channel then the signal doesn´t get changed but if it goes to the second one then get delayed depending on the TTL pulse generator. I´m trying to use the block "logic operations" to combine the signals but I get an error and I have already tried with different blocks but always get errors
It would be really nice if u can give me a tip
Attached I´m sending a pic of the layout and error.
Solved! Go to Solution.
04-09-2012 02:00 PM
All of the channels going into the Relay need to use the same timebase.
The TTL Pulse Generator may not be using the same timebase as the Switch and the Labjack input.
Look in the module properties for the Timebase button.
Note that I'm not familiar with the Labjack driver. I hope that it creates a timebase.
04-09-2012 02:33 PM
The blocks that say LabJack don't look like any of the VIs we provide, so not sure what they are. Not even sure if they are talking to the U12 driver or the UD driver (U3/U6/UE9).
In general our driver functions, and the VIs that call those functions, return basic data types. For example, eAIN() to read 1 sample from 1 analog input from 1 UD driver device, would simply return a floating point voltage.
04-09-2012 02:46 PM
@LabJack Support -- this is DASYLab, not LabVIEW. So it won't look the same.
04-09-2012 08:08 PM
Thanks for the tip that helped a lot! but I still can`t combine the two signals.. I tried the "logical operations" cause I want to create "a or b" but it is not working at all... any tip for that??
04-10-2012 01:59 AM
which DASYLab LabJack driver do you use, the LabJack U12 driver from here? If yes, this driver support "IRQ Standard" and "Polling". Which mode is used from you - a screen shot from hardware setup is useful? Only the "IRQ Standard" mode is useful if you "export" this timebase for other source modules. The "Polling" mode based on max 5 Hz software clock and is not useful for the timebase for other source modules.
04-10-2012 07:55 AM
You may want to post the actual worksheet.
04-11-2012 10:26 AM
attached u can find the layout, measurement setup and hardware setup of the program and card. I am using a Labjack U12 and i download the drivers from the link that @MHa mentioned. How can I change the mode? ("IRQ Standard" or "Polling")
I have the modules twice replicated cause I used two probes in two different reactors, with different operational settings.
The block named "Verknüpfun02 and 03" as logical operational blocks don´t work. The idea is to combine the signals with this block.
04-11-2012 10:41 AM
I would try this...
Open the Impulsgebe00 and Impulsegeb01 -- click on the Timebase button on the lower right (I'm not sure of the German dialogs).
Select Input... Now the module has an input for timing only. Branch the wire from the Signal router to this new input.
That should force the timing to match.
04-13-2012 03:21 AM
I tried that but I still don't get any signal when I use the "logical operation" module. I have noticed that if I don't use the "relay" module then works. Maybe there is another way to stop the measurement after 10 min and then restart it using an action module.