Created Date: September 30,2019

Created by: carnsdorff

Is it possible to use Allen Bradley 1734-AENT Point I/O (Remote I/O) with BRX PLC using Ethernet I/P?

I spoke with AD and they indicated it should be possible.

However, I looked in the BRX software (Do-More Designer) and I didn't see how to configure it to communicate with the remote I/O.

Any help would be useful - even if it is to tell me it isn't possible.

Created Date: September 30,2019

Created by: franji1

BRX currently implements Explicit Message, but not I/O Scanner. Can your A/B 1734 be an Explicit Message Server? If so, then you can use BRX as an Explicit Message Client. However, if the A/B can only be an I/O Adapter, then BRX currently does not have the capability of being an I/O Scanner.

Current plans are to add support for I/O Scanner in the next release.

Created Date: October 01,2019

Created by: carnsdorff

The 1734-AENT indicates it uses CIP messaging which I understand is explicit messaging.

I 've been looking at how to do this but I 've never used this communications option.

Any help on how to do this would be useful.

I see how to set the BRX as an Ethernet I/P server, however, I was thinking it would be the client.

I have the A/B manual discussing assembly instance, configuration size, etc. but I'm not sure how to use these.

I see there is an EIPMSG block that is likely used for this but once again, it's all new to me.

Created Date: October 01,2019

Created by: carnsdorff

Thanks for the help!

I'm still not sure how to configure the BRX plc to communicate with the AB point I/O.

Are there any examples of setting up the BRX in a manner that would communicate with the remote AB point I/O?

I don't see how to use the BRX to address the CIP parameters for the point I/O.

Created Date: October 02,2019

Created by: z28z34man

The 1734-AENT indicates it uses CIP messaging which I understand is explicit messaging.

I 've been looking at how to do this but I 've never used this communications option.

Any help on how to do this would be useful.

I see how to set the BRX as an Ethernet I/P server, however, I was thinking it would be the client.

I have the A/B manual discussing assembly instance, configuration size, etc. but I'm not sure how to use these.

I see there is an EIPMSG block that is likely used for this but once again, it's all new to me.

I am almost sure the 1734-AENT is implicit messaging. When setting up communication in the logix platform you need to set an RPI which indicates implicit to me. Explicit messaging is done through ladder logic and the PLC needs to ask the server every time.

https://library.automationdirect.com/ethernetip-implicit-vs-explicit-messaging/