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Micrologix & VFD via Ethernet/IP

Micrologix & VFD via Ethernet/IP

Micrologix & VFD via Ethernet/IP

Strange request.  I am trying to get a Micrologix 1400 to communicate with a Lenze SMVector VFD via Ethernet/IP.  I am writing everything in RSLogix 500.  I have never done this before and am looking for suggestions, recommendations, and or examples.

I am trying to get started with the code and need some examples of communicating via Ethernet/IP.  I realize I have indicated a very specific hardware setup that few have probably delt with but examples that show principles will be much appreicated.

Thanks in advance.

RE: Micrologix & VFD via Ethernet/IP

You need to find out what the interface is. Then program MSG instructions using CIP type.  

RE: Micrologix & VFD via Ethernet/IP

I've done this many times using rockwell VFDs, so I may be able to help.  A very basic rundown of how this all works is as follows:

The VFD has an ethernet card on it.  The ethernet card will be programmed with a static IP address so that it can be seen by the PLC which is also programmed with a static IP address.  The ethernet card allows some of the VFD parameters to be read or written to.  The VFD will have some parameters which are data links.  These links are memory spaces which are in constant communication with the ethernet card.  The links are empty until you assign a parameter value to them.  The links act as pointers to VFD parameter values.

The 1400 can talk to the ethernet card through a messaging file.  You need one file to send information, and another file to receive information.  The PLC has to have a static IP address which is accessible to the VFD.

The 20-comm-e manual (publication 20COMM-UM101D-EN-P) is a manual for rockwell's VFD communication cards.  On pages 4-38 to 4-44 there is an excellent example of how to use messaging files to talk to a powerflex 70.  I recommend that you read this example.  Also, on page 5-3 is a diagram showing how the 20-comm-e points to the data links in the VFD.  This will show you conceptually how this whole thing comes together.  You will have to find the manual for your specific VFD in order to find the actual mapping.

Good luck.

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