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Using the PXI-2527 with c#
DeepSpace
Member
07-04-2019 10:27 PM
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I am programming a C# test application using Measurement Studio and Visual Studio and I'm having trouble understanding how to close the relays on the PXI-2527. Going through each topology for the 2527, and trying to figure out how to close the correct relays, it seems the documentation does not support what I'm seeing. I found two example solutions. The first example is MakingConnectionsOnASwitch and the second is ControllingAnIndividualRelay. These are both found in C:\Users\Public\Documents\National Instruments\NI-SWITCH\Examples\DotNET 4.5.
For example, choosing the 1-Wire 64×1 Multiplexer Topology, and trying to close a single relay, I would expect to be able to connect any channel to com0 as described in the documentation. But I cannot do this.I would expect that in this topology, cho+ would be ch0, ch0- would be ch1, ch1+ would be ch2 and so on. But this does not work. I can never connect ch0- to com0. I can connect all the chx+ channels, but none of the chx- channels to com0. Also, if I use the designator "ch", I get errors that the "ch" is an invalid name. I can only use K0, K1, K2.... This does not match the documentation that I have read.
Does anyone have a better example of how to program the PXI-2527 to support all the different topologies?
Thanks,
shrupa123
NI Employee (retired)
07-08-2019 06:51 PM
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Are you getting an error when doing what you described above? If so, what is the error you are getting?
Also, which documentation are you following?
07-09-2019 08:42 AM
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I was getting an error due to using the wrong number of channels, and the wrong channel based on the chosen topology. However, I think I understand what my issue is. The TB-2627 terminal block that connects to the pxi-2527 switch matrix card has channel numbering on it. What I did not realize is that numbering really only applies to the 2-Wire 32x1 Multiplexer Topology. If you are using a different topology such as the 1-Wire 64x1 Multiplexer Topology the channel numbering does coincide with the channel you use in the software. I spent some time mapping how the channels for each topology connect to the terminals on the TB-2627 and I now understand how things are working.
I do appreciate your response, but I think I'm good now.
Regards,
