Experimental Physics and
Industrial Control System

[email protected] (Ned Arnold) · Thu, 12 Feb 1998 15:57:07 -0600

> Hi,
> 	
>  	I'm having a problem using the fields DOL[1-A] of the sequence
> record as constants. My database looks like:
> 
> .....
>  	field(DOL1,"0x80")
>         field(LNK1,"SarcBase5.VAL  PP MS")
> .....
> 
> 	I want the constant value of 0x80 to be written to the vme
> Record SarcBase5.VAL.   When I load the database, EPICS thinks that these
> are CA_LINKS and not constants, e.g.:(from dbtr of the record)
> 
> DOA: 0              DOL1:CA_LINK 0x80 NPP NMS               
> DOL2:CA_LINK 0x88 NPP NMS               DOL3:CA_LINK 0x84 NPP NMS               
> DOL4:CA_LINK 0x80 NPP NMS 
> 
> It clearly states in the seq record reference manual that these can be
> constants.  I'm sure this written down somewhere, but I've not been able
> to find it -- How do I indentify these values as constants?

Jeff,

To determine if a "link" is a PV or a constant, the c routine "strtod" is
used. Therefore, if the string cannot be interpreted as a "double", it is
assumed to be a PV name. You will have to enter 128 instead of 0x80.

	Ned

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System