Experimental Physics and
Industrial Control System

Kay-Uwe Kasemir <[email protected]> · Mon, 8 Mar 2004 09:13:11 -0700

On 2004.03.08 02:24, Kiman Ha wrote:
> Hello! Kay and Stephanie,
> Last Feb, I asked about AB SLC5/05 processor for Ethernet TCP/IP EPICS
> driver and support.
> The AB Comapny people said SLS5/05 PLC processor support EtherNet/IP.
Yes, it might support the common portion of the EtherNet/IP
protocol, the part that's documented at www.odva.org.

That will allow you to read the serial number of your SLC5/05's
ethernet interface.

In addition, you need the CIP service codes that are specific
to your PLC, the ones that allow you to read/write tags
or files or whatever the data of interest is called on the
respective architecture.

> I known your alread developed EtherNet/IP drivers and support for SNS
> project.
That EtherNet/IP driver package uses the CIP codes for the
AB ControlLogix 5000 series as described in
AB Publication 1756-RM005A-EN-E.

The latter publication also lists SCL commands,
but they are very different from the CIP service codes
for the ControlLogix series.
Control Logix uses CIP service codes
0x4C : read data
0x4D : write data
0x0A : multi request
and all those adress string tags on the Logix5000.

As far as I know, the SCL5 doesn't have string tags
but uses file/element/subelement addressing.

So I'm afraid those AB people who talked to you can
recite "EtherIP" from some SLC5 brochure but don't
really understand the protocol. 

This means that the ether-ip driver for the ControlLogix 5000 won't
talk to the SLC5, and making it talk to the SLC5 would be a major deal,
close to starting from scratch.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System