Instrument Control (GPIB, Serial, VISA, IVI)

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MODBUS Through NI USB 6008?

Hello.

 

I'm trying to control a VFD from my PC using Labview (could use something else if you suggest it is better).

After I get the basic control down I need to start adding PID control to it.

 

Can I use the Digital I/O of the NI USB as a port to communicate with the VFD with MODBUS protocol?

 

This might be completely far away from reality but I'm giving it a go.

 

Thanks.

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The digital IO is software timed, so you never can reliably get to the timing.

Modbus can communicate over several digital busses, serial and tcp/ip as normal. 

So depending on your instrument set you have to choose.

greetings from the Netherlands
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Thanks for the quick reply

 

So I will have to use a different USB from my laptop to connect directly to the VFD and use Labview MODBUS modules to talk to it?

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indeed

greetings from the Netherlands
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