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Old July 18th, 2018, 10:29 AM   #1
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brandoncosta is offline
Join Date: Feb 2011
Location: SLC
Posts: 36
New to PLC, using IDEC FC6A to control Lenze VFD

Hi there,

I have a project that need to use IDEC FC6A modbus to control a VFD which is Lenze SMVector.

I'm new to PLC and never done anything about modbus. But I watched the webinars and got the frame of the software.

Now, I still don't know how to connect the PLC with the VFD. I can program the PLC and make it the master, but I don't have a chance to program the VFD.

I saw on the other forums that people are using March 3. I don't know what is that and I don't think that will help.

So I'm here to see if anyone can tell me from the basic steps how to set up the connection between the PLC and VFD through modbus.

Appreciate for the help.

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Old July 18th, 2018, 03:12 PM   #2

gclshortt is offline
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Join Date: Dec 2014
Location: Cobourg
Posts: 2,766

The above is a good start for Modbus RTU review of the protocol.
This looks like the manual for the Modbus RTU device that you will be using. The master will read the addresses that are listed in this manual.

Hope this helps you out.
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Old July 18th, 2018, 03:25 PM   #3

Jonnie_R is offline
Join Date: Feb 2012
Location: Brecon
Posts: 147
This was talking to an Invertek inverter over Modbus RTU using an FC6A
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