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DR. JOHANNES
HEIDENHAIN
GmbH
D-8225
Traunreut
'Tel. (08669)
31-O
SERVICE
MANUAL TNC 151/155
Page
25
Kundendienst
Section
2.2.6
Loading
the
Burn-In
test
program
(Burn-In
test
program
not
already
loaded)
1.
Connect
the
Magnetic
Tape
Cassette
Unit
(MB 101/102)
to
the
V.24
socket
on the
rear
of
the
Control.
2.
Prepare
the
ME unit
to
down-load
the
test
program
to
the
Control
by
inserting
the
appropriate
program
cassette
(see
list,
page
20)
and
pressing
the
following
buttons:
Fig.
6 Initialization
of
ME unit
3.
Control
must
now be prepared:
After
applying
power
to
the
Control,
it
automatically
car-
ries
out
a memory
test.
During
this
time
the
dialogue
"MEMORY TEST"
will
be displayed
on the
VDU.
Upon
completion
of
this
test,
the
dialogue
will
be replaced
by
"POWER INTERRUPTED".
The
necessary
code
number
for
reading
in
the
Burn-In
test
program
is
entered
by pressing
the
following
keys:
El-
es oftea
1.
lnceeeely
to
abteia
?a
b##&b*s
"CODE NUMBER a",
and
then:
flgrrors
in
entering
these
numbers
can
be correcteB+~:I
gsessing
jg
).
4. The
data
transfer
is
then
intiatad
by pressing:
irEI
During
the
loading
of
the
Burn-In
test
program
from
the
ME
unit,
the
following
dialogue
will
be displayed:
"POWER INTERRUPTED
EXTERNAL
DATA INPUT"
If
necessary,
the
ME unit
will
first
rewind
the
cassette
tape
before
transmitting
the
data,
blockwise,
to
the
Control.
Any
user-programs
already
loaded/programmed
into
the
Control
will
be unaffected
by
loading
the
Bum-In
test
program.
5.
The Burn-In
test
program
occupies
both
tracks
of
the
cas-
sette
tape.
Consequently,
when
all
the
data
from
the
first
track
has
been
transferred,
the
following
dialogue
will
be
displayed:
"EXCHANGE
CASSETTE
- ME START
EXTERNAL
DATA INPUT"
TO complete
the
data
transfer,
turn
over
the
cassette
and
press
the
START button
on the
ME unit.
The VDU will
again
display
the
dialogue
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