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

Subject: Re: EPICS with Automation Direct PLC
From: Andrew Johnson <anj@aps.anl.gov>
To: Tao Zhao <tzhao2@lsu.edu>
Cc: tech-talk@aps.anl.gov
Date: Wed, 24 Sep 2003 09:31:08 -0500
Tao Zhao wrote:

I need to connect EPICS to Automation Direct PLC through Ethernet Base Controller. Have anyone done that? Would anyone recommand some online documentation for EPICS Device Support or Driver Support to read?

We are interested in being able to do this here at APS; we already communicate with Automation Direct PLCs using their DirectNet serial protocol, the software I wrote to do this is described at
http://www.aps.anl.gov/asd/people/anj/directNet/
and the code can be found at
http://www.aps.anl.gov/asd/people/anj/tar/directNetMpf1-0.tar.gz
It may be possible to re-use some of this software with an ethernet connection to the PLC, in particular look at the device support routines and the PLC status database. If you can't reuse the code I would hope that at least the hardware address format I devised could be used, as commonality at this level will make it easy to move databases between the two device types. See the above documentation for details of the format, it's simple and relies on named PLCs being configured in the IOC startup script.


Note that the above driver uses Marty Kraimer's MPF and mpfSerial for the serial port handling.

I am willing to help with questions and more, but after today I'll be away on honeymoon for the next 2.5 weeks (yay!).

- Andrew
--
There are 10 types of people in the world:
Those who understand binary, and those who don't.


Replies:
RE: EPICS with Automation Direct PLC John Quintana
References:
EPICS with Automation Direct PLC Tao Zhao

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