Open from multiple processes

[Ondrej.Janda]

Hi,
I was wondering if it is possible (using the VINT hubs) to open and attach channels (let’s say DI) on one physical hardware (DAQ1200_0) from different contexts/processes. Basically each process reading its own DI (different index).
I know it is not possible with the InterfaceKit 8/8/8, probably because the USB is blocked for the first process that asks for it, but I am wondering if anything changed with the VINT.

Thx,
Ondrej

[fraser]

I believe this is only possible if you access it over the network.

Since the VINT devices are all accessed through a the VINT hub (which unless you're using a SBC, is a USB device) you wont be able to access it from two processes.

[peterpolidoro]

If there are multiple VINT hubs connected to the host computer, is it possible to use a separate process for each hub? Or is the communication with the devices always limited to a single process, even if each hub is a separate USB device?

[mparadis]

If you have multiple VINT hubs, you can access each one with a different program or process. You can do this by setting the serial number of the channel before opening to match the serial of the desired hub.

[Patrick]

This is one of the main use cases for the Network Server. When connecting locally, latency is less then 1ms compared to a direct USB connection, and this allows you to access the same hardware from multiple processes.

-Patrick