Argonne National Laboratory

Experimental Physics and
Industrial Control System

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

Subject: Re: Communication between IOCs ...
From: mrk@aps.anl.gov (Marty Kraimer)
Date: Fri, 30 Sep 1994 08:44:50 -0600
I dont remember seeing a response to this so I will give an answer.

1) Most database links can be links to other ioc databases.
2) Forward links can NOT reference other ioc databases.
3) Sequence programs can reference other iocs.

Marty Kraimer

> From wu@fel.duke.edu Mon Sep 26 14:19 CDT 1994
> From: Ying Wu <wu@fel.duke.edu>
> Date: Mon, 26 Sep 1994 15:18:45 -0400
> To: tech-talk@aps.anl.gov
> Subject: Communication between IOCs ...
> Content-Type> : > text> 
> Content-Length: 617
> 
> Hi,
> 
> We have two IOCs for our storage ring control system. 
> For the magnet ramping application, we'd like to dedicate the first IOC 
> for the magnet control, and use the second IOC for other subsystem controls 
> and for the magnet readbacks. 
> 
> In this setup, if we want to do a slow feedback on magnets in the first
> IOC using the readbacks from the second IOC, we need a way to communicate
> at PV level between two IOCs. It seems to me that one IOC can get a
> PV value from another IOC via CA, how about forward links ? 
> It there any software solution? What is the hardware solution ? 
> 
> Any input is appreciated.
> 
> 
> Ying
> 
> 

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