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<== Date ==> <== Thread ==>

Subject: RE: Motor record -- URIP with soft limits
From: <[email protected]>
To: <[email protected]>, <[email protected]>
Cc: [email protected]
Date: Wed, 26 Sep 2012 14:41:37 +0000
Hi,

One caveat.. Make sure the ERES field is set correctly before switching UEIP (normally it would be the same as MRES). Otherwise you can get into a mess because the motor record attempts to do a 'set position' each time UEIP is switched. So if ERES is wrong it would set an incorrect number of counts on the controller. 

I think the logic there is something to do with wanting to keep RBV the same number if you switch UEIP.

Cheers,
Matt

> -----Original Message-----
> From: Mark Rivers [mailto:[email protected]]
> Sent: 26 September 2012 15:28
> To: J. Lewis Muir; Pearson, Matthew (DLSLtd,RAL,DIA)
> Cc: [email protected]
> Subject: RE: Motor record -- URIP with soft limits
> 
> On the Newport XPS we switch UEIP back and forth, depending on whether
> we want the RBV field to hold the theoretical position or encoder
> position.  Sometimes one does not want to see the encoder jitter,
> sometimes one does.  This can be changed at run-time with medm, etc.
> 
> Mark
> 
> 
> ________________________________________
> From: [email protected] [[email protected]] on
> behalf of J. Lewis Muir [[email protected]]
> Sent: Wednesday, September 26, 2012 9:25 AM
> To: [email protected]
> Cc: [email protected]
> Subject: Re: Motor record -- URIP with soft limits
> 
> On 9/26/12 5:21 AM, [email protected] wrote:
> > Hi,
> >
> > The pmacAsynMotor driver doesn't know about the motor record UEIP or
> URIP fields, as these are just internal to the motor record. But the
> driver does set the 'encoder present' bit in the MSTA field, allowing
> the use of UEIP to switch between REP and RMP for the position
> readback.
> 
> Hi, Matt.
> 
> Thanks for the info.  I guess that means my motor records that
> use the pmacAsynMotor driver are configured incorrectly for what
> I want (i.e. having the RBV field reflect the position reported
> by the encoder). :-(  I'll try changing them to have UEIP set to
> Yes.
> 
> Thanks!
> 
> Lewis

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Replies:
Re: Motor record -- URIP with soft limits Ron Sluiter
References:
Motor record -- URIP with soft limits Fong, Nia W.
Re: Motor record -- URIP with soft limits J. Lewis Muir
Re: Motor record -- URIP with soft limits Ernest L. Williams Jr.
Re: Motor record -- URIP with soft limits J. Lewis Muir
RE: Motor record -- URIP with soft limits matthew.pearson
Re: Motor record -- URIP with soft limits J. Lewis Muir
RE: Motor record -- URIP with soft limits Mark Rivers

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