Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Mon, 07 Dec 2009 18:05:04 -0500

Hi Geoff,

Short answer:   No.

Long answer: You are asking for something which would be quite the

opposite of what the Gateway was originally intended for, i.e. shielding

the IOCs by setting up monitors on the inside that feed into a cache,

and answering all outside requests from the cache.

This has been extended by the option to not cache data, so that get()

requests from the outside are always going through to the IOC.

I don't know if adding the option to have the Gateway actively produce

CA traffic on the IOC side is a step in the right direction.

Also: Wouldn't a periodically scanned record in a soft IOC behave

exactly the way you want?!

Adding the feature of periodic scanning on the Gateway would half-way

convert it to an IOC, mixing functionalities that I would rather see

being kept separate.

Cheers,
Ralph

On Mon 07 Dec 2009 17:23:36 Geoff Savage wrote:

Hi,

Is it possible to ask the gateway to poll PVs? Currently the gateway

uses monitors when it connects to the PVs on the client side. I would

like the gateway to have the equivalent of a SCAN field for a PV name

it is reading.

Thanks, Geoff