I am using the DAQ palette in LabVIEW to read virtual channels from DAQ input module. I have made many VI that read many inputs of three simulated modules. The problem appears when i run two or more VI´s that read inputs from the same virtual module (e.g.. first.VI reads module 1 input ai0 and second.VI reads module 1 input ai0), when this happen the next errors are showed: Error -50103 NI Platform Services: The specified resource is reserved. The operation could not be completed as specified. and Error -200022 Resource requested by this task has already been reserved by a different task. This is worrying because i want to get DAQ chassis and some modules, however if this problem is present with physical equipment my application could be useless. It means that module input only can be read once at time?

I´m using global variables in each subVI to share data with main VI, however i found the solution by different way... I just change the read mode to single channel and sample dbl, so i don´t need to clean the reading task in my subVI´s, the zeros problem isn´t there anymore, and the six subVI´s work simultaneously! Thanks for the advices!

Multifunction DAQ

Can DAQ module input be read by two or more LabVIEW vi at same time%3F

Solved!

Author

Yes I hope get the DAQ and sensors soon to make a prototype for system tests...!

Message 11 of 11

(1,325 Views)

Multifunction DAQ

Can DAQ module input be read by two or more LabVIEW vi at same time%3F

Re: Can DAQ module input be read by two or more LabVIEW vi at same time%3F