Re: devGpib problem

[Pete Jemian <jemian@anl.gov>]

Some parts of APS have these separated but most put them together on the 
same subnet.

On 07/16/2010 10:58 AM, emmanuel_mayssat@lynceantech.com wrote:
> On 18:17 Thu 15 Jul     , Mark Rivers wrote:
> > Shifu's device is a TCP/IP power supply, talking a simple ASCII
> > protocol.  When talking to the device it usually responds quickly, but
> > occasionally the responses are very delayed.  Whether this is due to the
> > device or to the APS network is not clear, but in any event sometimes
> > the response does not occur until after the 2 second timeout specified
> > in the devGpib file.  However, the device does appear to always
> > eventually reply.
>
> I have similar problems with a few of my networked devices.
> In my case, I believe this is due to broadcast packets.
> A (logical or physical) point to point connection (device<->  IOC ) solve that problem.
> I believe the broadcast packets are nothing less than the CA protocol itself ;-)
> In a perfect world, one should have a network with OPIs and another network for controlled devices.
> The IOCs are the bridges between both networks.
>
> At APS, are controlled devices and OPIs on the same net?