LVALUE.i4.v = LABSEL( INDATA.i2.r, IERR.i2.r [, UNITS.i4.r] )
Scaling service routine: Alarm Abort Monitor.
LVALUE logical value returned as TRUE (-1) if the ABORT on alarm
alarm condition is set and FALSE (0) if it is not.
INDATA unprocessed analog or digital monitor status as returned
by a DPGET for the Analog or Digital Alarm Block.
IERR error code returned as 0 for success.
UNITS optional argument in which the units text is returned
as 4 ASCII characters in a longword integer field.
(use with FORTRAN CHARACTER*4 via %REF(char)).
The text is either "ABT " or " ".