Experimental Physics and
Industrial Control System

[email protected] (Ralph Lange) · Fri, 14 Aug 1998 17:35:46 +0200 (METDST)

> I am using gdct313 to define an MBBI record and there is no place on the
> "Edit Attributes" form for specifying the number of bits to 'shift' the raw
> value (SHFT).  mbbiRecord.dbd does not assign the SHFT field to a
> promptgroup.  Is there a reason for this omission ?
> 
> This situation also applies to record types mbbo,  mbbiDirect,  and
> mbboDirect.

The SHFT value is device dependent. In most cases it depends on the
structure of the associated device and can be calculated from the address
information in the INP/OUT field. So device support usually sets SHFT in
initRecord() after parsing the INP resp. OUT fields.

Making the SHFT field DCT accessible would introduce redundancy and
most likely increase error probability.

The only problem could be Raw Soft Support, as there is no address
information in the INP/OUT fields and SHFT will always be 0. Right?

Ralph

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System