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HEIDENHAIN
DR. JOHANNES
HEIDENHAIN
GmbH
D-6225
Traunreut
.Tel. (08669)
31-O
Kundendienat
SERVICE
MANUAL TWC 151/155
Page
27
Section
2.2.6
Continuation
of
the
Burn-In
test
initialization
The
reminder
of
the
initialization
procedure
must
be described
in
conjunction
with
the
flow
diagram
of
figure
9,
page
29
1.
Beginning
with
the
display
"EXTERNAL
UNIT
CONNECTED
?"
which
refers
to
the
use
of
an external
test
computer,
the
operator
must
respond
by pressing
ig
2.
A check
is
now
automatically
carried
out,
to
ensure
that
the
test
program
data
has
not
been
corrupted
in
any
way.
If
an
error
is
detected,
the
display
"REREAD-IN
PROGRAM XXXX
CHECK SUM ERROR"
The lines
of
dots
represent
the
individual
keys
in
each
of
the
four
keying
fields.
The keys
must
now be pressed
once
each,
in
a defined
sequence,
in
order
that
the
Control
can
check
that
each
key
is
making
contact
and
delivering
the
correct
code
to
the
keyboard
interface.
The keying
sequence
is
as
follows:
- top
right
set
of
20 keys
- top
left
set
of
10 keys
- middle
left
set
of
20 keys
- bottom
left
set
of
4 keys
(only
with
TNC 155!)
- bottom
right
set
of
10 keys
In
each
case,
the
sequence
is
from
left
to
right,
beginning
with
the
top
row.
For
each
correct
key-push,
the
respective
dot
on the
VDU
will
be replaced
with
a "*".
If
an incorrect
code
is
received,
the
keyboard
test
will
start
again
from
the
beginning.
will
appear
on the
VDU,
and the
test
program
must
be reloaded
from
the
ME unit.
If
the
keyboard
test
has
previously
been
carried
out
(eg
before
a power
failure),
the
option
of
carrying
out
the
test
is
not
displayed.
In
this
case,
assuming
no error
message
has
been
stored
from
a previous
run,
the
program
jumps
into
the
sequential
tests
(see
page
30).
3.
If
the
keyboard
test
has
not
already
been
carried
out
(eg.
prior
to
a mains
interruption)
the
option
of
carrying
out
this
test
will
now be displayed:
4.
If
the
keyboard
test
has
previously
been
carried
out,
and
an error
message
has
been
stored
from
an earlier
run,
this
"BI:
SOFTWARE NUMBER XXXXXX
XX
error
message
will
be displayed
and
the
program
will
wait
JUMP OVER KEYBOARD
TEST ?"
for
an interrupt
(see
point
7).
The keyboard
test
can be
skipped
by pressing
the
key
ia
5.
In
the
case
of
a Control
designed
for
use
with
an external
PLC I/O
Board,
(TNC 151/155
Q/W)
the
following
text
will
appear
on the
VDU,
following
a successful
keyboard
test:
Any
other
key
will
cause
the
test
to
be carried
out,
in
which
case
the
following
display
will
appear
on the
VDU:
"0,
1,
OR 2 PC-BOARD
?"
. . . . . . . . . . . . . . . . . .
..E
This
refers
to
the
number
of
external
PIG
I/O
Boards
con-
. . . . . . . . ..E
netted
to
the
Control
during
the
test,
and must
be answered
. . . . . . . . . . . . . . . . . .
..E
with
the
appropriate
numeric
key;
. . .
. E (only
with
TNC 1551)
. .
. . . . . .
..E
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