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2.7
SIGNAL
SPECIFICATIONS
[____conecros Ss
P1/Pin
K1/Pin
K2/Pin
H MEANING/ DESCRIPTION
in
out
in
out
in
Jout
1-8
Ch1-8
A1-8] B1-8 || Channel
1 through
8. Data signals
from
external
unit.
A high signal
(pulse)
for each hole to be punched.
Ch9
A9
|B9- | Channel 9, Feed hole channel. A high signal (pulse)
| for each hole to be punched.
CODE HOLES
| Code holes. A low signal from switch
S5 on control
| panel makes the punch unit to punch
feed holes and
| holes
as per straps W1-W8,
ERR1
Al6
| Error signal
1. This
signal
goes
high when
an error
is detected,
(Tape ruptured).
Sets
PR low.
ERR2
Al7
A20 |} Error signal
2. The
same
action
as
ERR1.
Turns
on the
error
lamp.
(Available
only via system adaption
board
in connector
K2/A20).
EXT
External
signal.
OV when
EXT button
(S4) is depressed.
FEED HOLES
Feed
holes.
A low signal
from
FEED HOLES
button
($5)
causes
the tape punch to feed tape while punching
feed
holes.
FAN
Fan.
A low signal
causes
the Fan motor
(M2) to start.
Starts
when
feeding or punching
is called
for.
L1-L8
Coils
1 through
8. Signals
for the coils
contained
in
the punch solenoids
(for the character
punching).
When
low a hole is punched.
L9
Coil 9, signal
for the coil contained
in the punch
solenoid
for the feed hole punching.
When low a hole
is punched,
L10,L11,L12
Coils
10 through
12. Signals
for the coils contained
in the stepper motor
M3. The signals
are low,
one at a
time,
causing
the motor shaftto
turn at 120° intervals.
PI
Punch
instruction.
When
high,
acting
as a start
pulse
for the punching
cycle.
See Fig.4.
PR
Punch ready,
Low when data is stored
in the buffer
register.
High when
punching
is completed.
Low at error.
SD
1 Stepping direction.
SD=0 means forward feed, SD=1 means
backward
feed,
TAPE ERROR
Tape error.
When reed switch
S8 opens, an error condition
arises
and the error
lamp (red) is lighted
and error
is
} signalled
as described
above.
Fig. 3 shows the error
| occassions.
TAPE FEED
| Tape feed,
When depressing
the TAPE FEED button,
this
signal
goes low causing tape feed to be executed,
TL, TAPE LOW
Tape low. When the tape low sensor
arm makes
reed switch
S9 to close
(see Fig. 3), TL goes
high signalling
tape
low.
At the same
time Lamp X3 (orange)
is Lighted.
| Timing pulse.
Pulse generated
in the TP flip-flop.
Be-
comes
|] during excitation
of punch solenoids.
;
AB22| AB22
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