Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 29 Nov 2017 15:01:05 -0600

On 11/29/2017 02:44 PM, Ralph Lange wrote:
>     This is one of those situations when a link type that atomically reads a
>     dbState value might be worthwhile, and a better solution than using CA
>     links. Actually why limit ourselves to just binary values, why not
>     create a link type that provides atomic access to any shared storage
>     (similar to the old global symbol support, but with proper thread
>     protection)?
> 
> We have a single simulation switch bo record per PLC, and it resides on
> the IOC connecting to the PLC.
> We only need CA links in SIML to not have all >10K records be in a
> single lock set.

Right, and by setting all your SIML inputs to read the same dbState
value they can read the binary value from the state without all the
added complexity of a CA link.

    field(SIML, {state:simMode})

You would also have a bo record to set the simMode dbState value.

Next release maybe...

> I will prepare a merge proposal tomorrow.

Okay.

- Andrew

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System