Experimental Physics and
Industrial Control System

Mohan Ramanathan <[email protected]> · Tue, 9 Feb 2010 16:40:52 -0600

hi

the Ether/IP software is available from ORNL I think.  we use it in numerous beamlines a APS.

Use the controllogix Ether/IP driver on the windows machine. that way you can access all the tags from the plc into a EPIC soft IOC in the windows machine.

mohan
On Feb 9, 2010, at 4:36 PM, Elliott Wolin wrote:

> Hi,
> 
> Some clarifications:
> 
> I have no control over the "other" system, and cannot modify it in any way.  The system supplies cryogens to the my setup.  I'm told that flow rates, temperatures, etc. are all available as EPICS PV's.  They have no PLC's that I know of.
> 
> I only have an A-B PLC and a Windows PC that runs the PLC programming software.  I can run programs on the PC (or on a Linux box, if needed).  I want the PLC to be able to access the flow rates, temperatures, etc. that they provide as PV's.
> 
> 
>> Hi,
>> 
>> For a small and short-lived test setup my A-B ControlLogix PLC needs to read some EPICS values from another system.  What are my options?
>> How about using an Ethernet/IP server library?  I.e. write a program that uses EZCA to poll the EPICS values periodically, then serve them to the PLC via Ethernet/IP...does this work?
>> 
>> I prefer not to have to purchase anything (e.g KEPserver software), and just want to use freeware to get past this test.
>> 
>> Any suggestions? 
> 
> 				Sincerely,
> 					Elliott
> 
> ================================================================================
> 
> 
> Those raised in a morally relative or neutral environment will hold
> 		    no truths to be self-evident.
> 				   
> Elliott Wolin
> Staff Physicist, Jefferson Lab
> 12000 Jefferson Ave
> Suite 8 MS 12A1
> Newport News, VA 23606
> 757-269-7365
> 
> ================================================================================
> 
> 
> 
> Mark Rivers wrote:
>> Are you already communicating with this PLC from an EPICS IOC?  If so, are you writing to the PLC or only reading from it?
>> If you are writing to it, then why not have that IOC get the EPICS values and write them to the PLC in addition to the data it is already writing?
>> Mark
>> 
>> ________________________________
>> 
>> From: [email protected] on behalf of Elliott Wolin
>> Sent: Tue 2/9/2010 4:15 PM
>> To: [email protected]
>> Subject: Accessing EPICS PV from Allen-Bradley PLC
>> 
>> 
>> 
>> Hi,
>> 
>> For a small and short-lived test setup my A-B ControlLogix PLC needs to
>> read some EPICS values from another system.  What are my options?
>> 
>> How about using an Ethernet/IP server library?  I.e. write a program
>> that uses EZCA to poll the EPICS values periodically, then serve them to
>> the PLC via Ethernet/IP...does this work?
>> 
>> I prefer not to have to purchase anything (e.g KEPserver software), and
>> just want to use freeware to get past this test.
>> 
>> Any suggestions?
>> 
>> Thanks,
>> 
>> --
>> 
>>                                Sincerely,
>>                                        Elliott
>> 
>> 
>> ================================================================================
>> 
>> 
>> Those raised in a morally relative or neutral environment will hold
>>                    no truths to be self-evident.
>>                                  
>> Elliott Wolin
>> Staff Physicist, Jefferson Lab
>> 12000 Jefferson Ave
>> Suite 8 MS 12A1
>> Newport News, VA 23606
>> 757-269-7365
>> 
>> ================================================================================
>> 
>> 
>> 
>> 
>>  

-----------------------------------------------------------------------------------------------------
Mohan Ramanathan						Senior Beamline Engineer
[email protected]						Advanced Photon Source
(630)-252-3773 (off)/(630)-822-5625(Cell)	Argonne National Laboratory
(630)-252-7187 (FAX)					Argonne, IL 60439
-----------------------------------------------------------------------------------------------------

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System