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<== Date ==> <== Thread ==>

Subject: Re: ethernet IP
From: John Sinclair <[email protected]>
Cc: Tech-talk <[email protected]>
Date: Thu, 23 Aug 2007 12:38:14 -0400
All,

Many thanks to Xiaosong Geng who supplied the following info:

Hi John,

This is the info I got from Cornell.

Regards,
Xiaosong

------ Forwarded Message
*From: *Mike Forster <[email protected]>
*Date: *Wed, 01 Aug 2007 12:51:03 -0400
*To: *"Geng, Xiaosong" <[email protected]>
*Cc: *Kay-Uwe Kasemir <[email protected]>, John Dobbins <[email protected]>
*Subject: *Re: Ethernet/IP Device Support and CompactLogix


Hi Xiaosong,
We have not had any further trouble with using EtherIP for CompactLogix. The testing has not been extensive, but everything we have tried seems to work.


All the best,
Mike Forster

On 8/1/07, *Geng, Xiaosong* <[email protected]> wrote:

Hi Mike,

   How about the usage of Kay's ether_ip driver for CompactLogix? Is
   everything working well except EIP_buffer_limit?
   Shanghai Light Source in China is interested in it, because
   CompactLogix is cheaper than ControlLogix.

   Thanks a lot in advance.
   Xiaosong



On 6/29/07 4:21 PM, "Mike Forster" <[email protected]> wrote:

       Hi folks,
       Just an update on our EtherIP with CompactLogix use:
       We are communicating smoothly with the PLC at this point after
       sorting out an anomaly.

       We saw that when a record scan list became long (too many
       records with the same scan rate), all the elements in that scan
       list would stop responding.  Eventually we traced this down to
       the EIP_buffer_limit which was the default 500.  This limit at
       500 allows data to be sent that is 554 bytes long.  After some
       trial and error we found that the PLC responded correctly if the
       data sent was 548 bytes long or less.  When we set
       EIP_buffer_limit to 494 our problems went away.

       Mike Forster with John Dobbins
       LEPP
       Cornell University


Thanks for the info James. I should have been a bit more specific however...

We are using controlLogix processors, such as the 5561 PLC, with Kay's software. This
requires a chassis, PLC, and communication module (e.g. the 1756-ENBT). The compactLogix
platform is a potentially rackless configuration which, for a small application, would
require only an external power supply and a compactLogix PLC (with built-in ethernet port).
This translates to half the cost of a controlLogix system.


So I'm wondering if anyone has used any of the complactLogix family of processors with Kay's software.

John

James B. Stevens wrote:
I have a working test setup in my lab with a ControlLogix
5561 PLC module & 1756-ENBT Ethernet/IP module that talks to a soft ioc running on my Solaris box. I built the software
using Epics version R3.14.9 and ETHER_IP module 2-15-asd2.
--Jim S.


Subject: ethernet IP
To: Tech-talk <[email protected]>
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Has anyone used Kay's ethernet IP code with Allen-Bradley compact logic processors?

John Sinclair


*****************************************
* *
* James B. Stevens * * Advanced Photon Source *
* Controls & Computing Group *
* *
*****************************************







References:
Re: ethernet IP John Sinclair

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