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<== Date ==> <== Thread ==>
Subject: Re: EPICS for personal safety system
From: "Dudley, David" <[email protected]>
To: "[email protected]" <[email protected]>
Date: Sun, 24 Mar 2013 14:21:16 +0000
In the case of BNL's NSLS-II, in order to meet the safety requirements, EPICS and the PLC's in the PPS (Personnel Protection System) have no direct access between them.  

There is an intermediate PLC with 2 network interfaces that EPICS has complete access to, and the PPS PLC's have write access to.
 
 Nothing can directly access the PLC's in the PPS system, and it writes status information into, and reads commands from the interface PLC.

That prevents EPICS from sending a command that might compromise the PPS, as well as access from anything else on the controls network causing the PPS PLC's to be compromised.

Later-

David



On Mar 24, 2013, at 5:20 AM, Morteza Mansouri <[email protected]> wrote:

Subject:
From:
To:
EPICS for personal safety system
 
Hello everyone,
 
We are planning to build a monitoring system for our PSS (personal safety system) in SESAME based on EPICS.
I am looking for some advice if it is recommended that the IOC has writing permission to PSS PLCs or it should be the case of the IOC only reading from PSS PLC.
 
Many thanks for your help in advance.
 
Morteza Mansouri
PSS (Personal Safety System) Engineer
SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East)
P.O. Box 7, Allan 19252, Jordan
 

References:
EPICS for personal safety system Morteza Mansouri
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