GPIB communication between two computers

I try to communicate between two computers via GPIB. A computer to send an order, the other will receive, save and then respond accordingly. This response will then be received by the first computer and displays (this is the emulation of a device, the real need is to communicate with a satellite TT & C)

I realized all of this. However, to be in listening mode I wired a property node with a timeout-infinity (1) before reading. Now I can't leave the VI as he is still stuck in playback until the receipt of an order.

How can I get out of the VI when he's stuck in playback function.

PS: Using GPIB for communication is a requiremnet of ht eproect and cannot be replaced.

Hello

You can have the timeout of read and then clear the error and keep looping until you get a message.  And then you can use arithmetic consisting of stop the loop if you click on the stop button, or get one error other than a timeout, or if playback returns data.

If it works for you?  I joined your 'writing and then read.vi' with the added code.  Double check my logic, I'm sure it's just but not run it.  Also, if you return a large amount of data make sure that the time-out period is sufficient.

Tags: NI Hardware

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