@aerosimon wrote:
Hello,
I work with molblocs connected by GPIB cable.
I would like to be able to connect several of them in parallel, i.e. all on top of each other to my GPIB port on my acquisition module.
When I connect only one I can read its identity on NI MAX but when I connect several the identity takes very strange forms that I can't read.
I would like to know how to differentiate them and especially how to select with which of my two devices I want to communicate at the moment.
Has anyone ever been in this situation?
I have already read this article https://www.ni.com/getting-started/set-up-hardware/instrument-control/f/gpib-usb , but it did not help me much, I do not understand what is meant by "If you have several instruments on the bus, you can determine the address of a particular instrument by disconnecting all the others."
Thanks for your help.
Margot.
It sounds like you have more than one device sharing the same GPIB address and they are talking over each other as they are both trying to answer a query.
Check every device and make sure they are all set to a different GPIB address.
As for the "If you have several instruments on the bus, you can determine the address of a particular instrument by disconnecting all the others." part...
- Connect one single device to your GPIB interface
- Use NI-MAX to "Scan for Instruments"
- See what GPIB address that one is found at
- Connect another single device
- Do it again,
========================
=== Engineer Ambiguously ===
========================
