Re: Help to get started with EPICS

[Han Lee via Tech-talk <tech-talk at aps.anl.gov>]

Hi Jeroen,

At least two minimum modules which you need to configure your IOC

Asyn / Modbus

Mark is the right person whom you can contact directly. And you can find them in the following link

https://github.com/epics-modules

And this is the additional examples you can look at

https://github.com/jeonghanlee/epics-ioc-NTI-EMS/blob/master/cmds/E1Wmodbus.cmd

And you can see a few more examples at the directory also

https://github.com/jeonghanlee/epics-ioc-NTI-EMS/tree/master/iocsh

By the way, the repository is valid only for historical purposes.

Best,

Han

On Fri, Mar 22, 2024 at 8:38 AM Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> wrote:

Hi Jeroen,

 

• Now I would like to do a test to be able to connect to an PLC. We use ABB PLCs via modbus over IP at the moment. So, it would be nice to have a way to use that same setup with EPICS. Does anyone know of an IOC for this type off communication between EPICS and PLCs?

 

There is an EPICS driver for Modbus communications, and many of us use it to communicate with PLCs.

 

https://github.com/epics-modules/modbus

 

It contains an example IOC and example startup scripts that communicate with Koyo PLCs.  For example this one:

https://github.com/epics-modules/modbus/blob/master/iocBoot/iocTest/Koyo1.cmd

 

I am using this driver to talk to Allen Bradley SLC500 PLCs over Modbus for our beamline equipment protection systems.

 

This is the script that configures the Modbus driver for that system:

https://github.com/CARS-UChicago/GSECARS-EPICS/blob/master/iocBoot/ioc13ida_linux/eps_modbus.cmd

 

The EPICS records are defined in the .substitutions files in that same directory.

 

Let me know if you have any questions.

 

Mark

 

 

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Schwab, J (bscs) via Tech-talk
Sent: Friday, March 22, 2024 8:58 AM
To: 'tech-talk at aps.anl.gov' <tech-talk at aps.anl.gov>
Subject: Help to get started with EPICS

 

Hi,

We at Partrec are investigating if EPICS is useable for us. I have done an EPICS base install on an Ubuntu server following the instructions on docs.epics-controls.org. And did some tests with creating a sample IOC and caput that all seems to work fine.

Now I would like to do a test to be able to connect to an PLC. We use ABB PLCs via modbus over IP at the moment. So, it would be nice to have a way to use that same setup with EPICS. Does anyone know of an IOC for this type off communication between EPICS and PLCs?

 

Hope you can help.

Jeroen Schwab

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Jeong Han Lee, Dr.rer.nat.

Lawrence Berkeley National Laboratory

https://orcid.org/0000-0002-1699-2660