Experimental Physics and
Industrial Control System

"Owens, PH (Peter)" <[email protected]> · Thu, 16 Oct 2003 11:38:00 +0100

> The Lakeshore LS208 needs at least 2-3 seconds to switch 
> channels and then
> get a readout for that channel, however, it is perfectly well able to
> process another command.
> 
> If the database isn't set up to wait (we use sequence records 
> with delays
> set) until the device is done settling, the readout is a 
> string of hyphens
> rather than a number (just like what it says on its fron 
> panel at the time
> it gets the command).

This is another example where streamDevice would make things easier.
You can define delays within the protocols.

For example for the situation described above could define
a protocol looking something like this:

    readoutchan { out "SEL CHAN \$1"; wait 3000; out "GET VAL"; in "%f" }

Though this would block any other commands during the delay.

Pete.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System