Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Thu, 20 Jun 2013 09:53:22 -0700

Can the table accept commands while a previous command is active?   If not, what is wrong with just waiting for the OK?

On Jun 20, 2013, at 9:05 AM, Christian Pauly <[email protected]> wrote:

> Hi
> I am trying to set up EPICS control for a XY-scanning table.
> Control of the motor controller for the two stepper motors via RS232 is rather simple, and already implemented via StreamerClass:
> 
> The controller understands 4 simple commands:
> u100/r
> d100/r
> l100/r
> r100/r    to move the motors up/down/left/right by 100 steps.
> 
> In return, AFTER FINISHING the move (which can take up to 10sec), the controller returns a "OK/r/n"
> 
> So far i was using a protokoll like this:
> move {
>    out "\$1%d\r";
>    in "OK\r\n";
> }
> 
> and 4 EPICS records for moving like this:
> record(longout, "XY:movel")
> {
>    field(DESC, "Move XY-Table left")
>    field(DTYP, "stream")
>    field(OUT,  "@devXYtableSupport.proto move(l) $(PORT) $(A)")
>    field(FLNK, "XY:posX.PROC")
> }
> 
> However, due to the long move-times, this is not ideal. As i understand from the documentation, one should rather implement an asynchronous control.
> 
> Best would be, to have a separate boolan record "motorsmoving" which is set to "TRUE" every time i send a move command to the controller, and which is set back to "FALSE" once the controller sends back the "OK".
> 
> Any advice how to proceed ???
> I am fighting for days now...
> 
> Thanks for any help !
> 
> Christian
> 

-- 
Eric Norum
[email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System