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

Subject: RE: SNMP and APC rack power distribution units
From: <nick.rees@diamond.ac.uk>
To: <wolin@jlab.org>, <tech-talk@aps.anl.gov>
Date: Thu, 24 Jun 2010 14:31:58 +0100
Hi Elliot,

I went through this about a year ago. We have the APC units (AP7953 and
AP7957), and I use SNMP to monitor the current (and hence power).

The version of devSnmp on the DESY website is only good for trivial
applications - it has a lot of problems if there is significant traffic.
However, Sheng Peng sent me an update that he had done that worked much
better. I forwarded this on to Matthais to be merged in with the one on
the DESY website, but he was obviously a bit busy that day :-). At
least, it never got on to the DESY website. If he wants to do it now, I
would appreciate it otherwise there are two files on our downloads area:

http://controls.diamond.ac.uk/downloads/misc/snmp.tgz

http://controls.diamond.ac.uk/downloads/misc/snmp_desy.tgz

The first is the file that Sheng sent me. The second is basically the
same but re-arranged to be slightly more standard and reflect the
directory layout from the previous DESY release - it is slightly easier
to merge in with the previous release, and so I prefer its structure.

If you want an APC database I can send it to you, but I only monitor the
power and that is trivial - poll an Ai with the following fields:

  field(DTYP, "Snmp")
  field(INP, "@$(device) public .1.3.6.1.4.1.318.1.1.12.2.3.1.1.2.1
Gauge32:")

This returns the Phase 1 current in 10ths of an amp. To read the Phase 2
or Phase 3 currents, replace the last digit of the OID with a 2 or a 3.

Cheers,

Nick Rees
Principal Software Engineer           Phone: +44 (0)1235-778430
Diamond Light Source                  Fax:   +44 (0)1235-446713 

> -----Original Message-----
> From: tech-talk-bounces@aps.anl.gov 
> [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Elliott Wolin
> Sent: 24 June 2010 14:06
> To: tech-talk@aps.anl.gov
> Subject: SNMP and APC rack power distribution units
> 
> Hi,
> 
> We're thinking of using APC Ethernet-controllable rack power 
> distribution units.  One of the many ways you can talk to them is via 
> SNMP. 
> 
> Has anyone used these or similar units?  And what is the 
> status of EPICS 
> communicating via SNMP?
> 
> 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
> 
> ==============================================================
> ==================
> 
> 

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SNMP and APC rack power distribution units Elliott Wolin

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