Labview with Ethernet/IP to Allen Bradley

phuz · Mar 5, 2016

Does anyone have experience with using Labview and the Ethernet/IP driver?
I am finding the functionality very limited and could use some pointers.

jstolaruk · Mar 6, 2016

What functionality are you looking for that can't be configured in a I/O map?

phuz · Mar 6, 2016

Well, maybe it can, but I haven't found a way. One of the main things I need is to have a button that writes to a boolean tag, but reads its indicator from a different tag. The only solution I have found so far is to throw an indicator on top of the button, so its two different objects. It works, but its not ideal.

jstolaruk · Mar 6, 2016

A rung can be added to the PLC that basically mirrors the push button input (defined in the input image) to an output (in the output image). This is basically a acknowledgement that the PLC received the input by setting an output.

phuz · Mar 6, 2016

Yup, that's what I'm doing now. But on the Labview, I wanted to have a single pushbutton that allows you to write to a tag and read from a different tag, just like FTView, IFIX, WW, etc. can do.

jstolaruk · Mar 6, 2016

Sorry, I thought you were stymied on the PLC side. Been more than a few years since I've used Lab-View.

Highland Controls · Mar 6, 2016

Just use an event(usually Mouse Up) to set(write) the value, but have a loop read the value from the PLC.
https://www.dropbox.com/s/zkg857zejfpdont/LabVIEW Bool Example.vi?dl=0

https://www.dropbox.com/s/n3lse5yrw27191s/LabVIEW Bool 2.png?dl=0

https://www.dropbox.com/s/1dj9s0snn9m72t4/LabVIEW Bool 1.png?dl=0

phuz · Mar 23, 2016

Thanks, but for this method, where are you setting the network path?

Highland Controls · Mar 23, 2016

Not sure what you mean. I thought you were already reading and writing your booleans.

phuz · Mar 23, 2016

Highland Controls said:
Not sure what you mean. I thought you were already reading and writing your booleans.

Yes, I think I misunderstood how to work this one you sent. Let me play with it a bit more. I wasn't quite clear how to link this to my existing BOOL (which has the network path).

Highland Controls · Mar 23, 2016

Yes, my example had nothing to do with Ethernet/IP, only on reading and writing the bools.

phuz · Mar 23, 2016

OK, got it.

Now the next hurdle. Possible to do a list selector like in a PV?

the_msp · Mar 23, 2016

In labview, right click the front panel, and go into the "Ring and Enum" category

phuz · Mar 23, 2016

Thanks. It doesn't look like you can populate it from CLX strings though and then write the index value back down. At least not easily.

Highland Controls · Mar 23, 2016

Can be done with property nodes: https://www.dropbox.com/s/mwz8gdhahrfju74/Test%20Ring%20Example.vi?dl=0

Labview with Ethernet/IP to Allen Bradley

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