Experimental Physics and
Industrial Control System

Hi,

 

We at ESS are using CA gateways in a “chain” configuration, i.e., roughly in the following way:

Machine (aka Technical) network -> gateway A-> internal DMZ -> gateway B-> office network.

 

Does any of you have any experience with such a configuration?

 

What we have been seeing are somewhat oddly constant access delays, for instance caget taking more or less exactly one second to read an otherwise idle PV via gateway B.

 

Not surprisingly, this appears to be related to the traffic on the networks (i.e., machine operation.)

 

We have not yet done any systematic studies on this, I just thought to ask if anybody has experience or thoughts about this kind of issue.

Is this usage pattern something that should rather be avoided?

 

Cheers,

 

Timo