When a ser ia l pol l is conducted, the V i deoBr i dge returns a status byte
to the control ler. This byte will have one of three values :
( 0 )
--
a l l bits are zero : the V i deoBr i dge i s not busy, and
S R Q
has
not been asserted.
( 1 )
--
the f i rst bit is one, the rest are zero : the V i deoBr i dge i s
busy,
SRQ
has not been asserted.
( 6 4 )
--
the seventh bit i s one, the rest are zero : the
S R Q
has been
asserted.
An e rror message w i l l be transm itted.
I f the control ler does not conduct a ser i al pol l between commanding
measurements, the prev ious measurement w i l l be w r itten over.
A . 2 . 1 1
Ca libra t i on
The
2 1 5 0 / 2 1 6 0
needs no ad justment, other than normal cal i brat i on, when
the GPI B o r the
R S - 2 3 2C
option is i nstal led. Neither c i r cu i t assembly
contai ns ser v i ce ad justments.
TO A V O I D PERSONAL I NJURY FROM ELECTRIC S HOCK DO NOT REMOVE
I N S T R U M EN T COVERS OR P E RFORM A N Y M A I NTENA N C E OT H ER THAN
DESCRI BED
I N
THI S
I NSTRUCTION
S HEET .
INSTALLATION
AND
MAINTENANCE PROCEDURES DESCRIBED IN THIS I NSTRUCT ION SHEET
ARE TO BE PERFORMED BY QUAL I F I ED SERV I CE PERSONNEL ONL Y .
elsli
A
-
3 9
2 1 5 0 / 2 1 6 0
9 / 8 5
Summary of Contents for VideoBridge 2150
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