AB PLC to AC800M communication over Ethernet

Hi,

I need to communicate Allen Bradley PLC Compact Logix 1769-L33ER with 800xA 5.1 RevD FP4 via Ethernet IP which is connected to Plant Network and there is no way to do third party OPC communication also .Kindly anyone suggest me a protocol for this communication.

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Deepak.S Rank: 30

Asked 2 years ago

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Greetings,

For Ethernet/IP Communication, you have to obtain a CI873 card for 800xA CPU side. CI873 behaves as a Master, so AB CompactLogix CPU configures as Slave.

By the way, if 800xA side has also a CI867 (Modbus/TCP Card). You can use Modbus TCP/IP communication protocol.

AFAIK, the new CompactLogix 5370 models come with an updated Ethernet port which supports open sockets.

And on the Rockwell’s sample code website you’ll find a sample application which uses the open sockets feature to give these new CompactLogix models the ability to be either a master or slave on a Modbus TCP network.

If you're using an older version of CompactLogix, so you have to buy MVI69-xx Modbus TCP/IP card.

Hope it helps you.

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Titus

Rank: 6

Answered 2 years ago

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EtherNetIP(Industrial Protocol) is your protocol if you're stating you are using that. Also referred to as AllenBradley Ethernet, was developed by AB and youre controller is using that protocol on its native ethernet port, it is based on the CIP protocol. Why is there no way to do OPC? RSLogix is an OPC server. If you want to use ethernet IP direct then you need the CI873 as mentioned in the other answer. I would not recommend using open socket Modbus even with the sample code unless you are experienced with that sort of code or you will be left confused, it is also very limiting to the number of slaves and polls you can do. If you want to do modbus TCP, then you need the appropriate hardware one either side to support it.

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BK_REIS Rank: 80

Answered 2 years ago

CI873 can be used for Ethernet/IP communication. Data can be available to CN (not directly in PN). If need data directly in PN, then best way to propose OPC. In 800xA side, Generic OPC can be used for acessing TP data.

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ershivkumar2002 Rank: 53

Answered 2 years ago

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AB PLC to AC800M communication over Ethernet

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