IBM 1402 User manual

Systems Reference Library
IBM 1402 Card Read-Punch
This publication covers the IBM 1402 Models 1, 2, 3,4, 5, and 6.
Included are descriptions
of major mechanical units, their functions
and operating controls, and special features
that can be installed to
expand the capabilities of the basic machine.
Additional publications concerning 1402 operation with various
IBM data processing systems are listed in the SRL bibliography for
the specific system. The bibliography lists all technical reference
literature and related materials necessary for planning, program-
nring, installing, and operating the data processing system in any
configuration.
Form Number 1402-03
Form A24-3072-2

This is a major revision of, and obsoletes, A24-3072-1. Changes have been made
throughout
to delete references to Model Nl and to include information about Model 6.
Specifications contained herein are subject
to change from time to time. Any such change
will be reported in subsequent revisions or Technical Newsletters.
Requests for copies
of IBM publications should be made to your IBM representative or to
the IBM branch office serving your locality.
Address comments concerning the contents
of the publication to IBM Corporation,
Product Publications, Department 245, Rochester, Minnesota 55901.
C International Business Machines Corporation 1960, 1961, 1962

CONTENTS
IBM 1402 CARD READ-PUNCH. 5
Introduction • 5
Major Units
of the 1402 5
Read Feed 5
Punch Feed • 5
Stackers • 6
OPERATING CONTROLS AND PROCEDURES • 7
Models
1, 3, 4, 5, and 6. 7
Model2 • 7
Restart Procedures • 8
Reader Errors 9
Punch Errors (1402 Modesll, 3, 4, 5, and 6 Without Punch
Feed Read Special Features) • 10
Punch Errors (1402 Models 1, 3,4,5, and 6 With Punch
Feed Read Special Features) • 11
Card Jam Removal 12
Transport Area • 12
Punch Feed • 13
SPECIAL FEATURES. 15
51-Column Interchangeable Read Feed . 15
Early Card Read 15
Punch-Feed Read (Models 1, 3,4,5, and 6) • 17
Read Punch Release. 17
Column Binary, Read and Punch Column Binary, Binary
Transfer
17
Timing Summary 17

IBM 1402 Card Read-Punch

INTRODUCTION
The IBM 1402 Card Read-Punch provides punched-card
input and
output for several of the IBM data processing
systems.
It is available in six models. Model 1 is used with
Models
A, B, C, E, and F of an IBM 1401 Data Processing
System; Model 2
is used with the IBM 1410, 7010, 7040,
and 7044 Data Processing Systems; Model 3 is used with
the IBM 1460 Data Processing System; Models 4 and 5
are used with the
IBM 1401 Model G Data Processing
System; and Model 6 is used with the IBM 1401 Model H
Data Processing System.
Each model
of the 1402 has a read feed, a punch feed,
and
five card stackers. The stackers are so controlled that
three stackers can serve each feed.
MAJOR UNITS OF THE 1402
Read Feed
The read feed
on Models 1, 2, and 3 can read 800 cards a
minute; the read feed on Models 4, 5, and 6 can read 450
cards a minute. The actual reading speed during an appli-
cation depends upon the processing time required for each
card.
The read feed
is at the right end of the 1402 (Figure 1).
On Models
1, 2, 3,4, and 6, a file feed tray permits the
loading
of approximately 3,000 cards at one time. Small
groups
of cards (200 or fewer) can be placed directly into
the read hopper
by lowering the joggler gate, carefully align-
ing the cards and card weight in feeding position, then rais-
ing the joggler gate
to allow card feeding or runout. Model
5, which does not have the me feed tray and joggler gate,
has a read hopper capacity
of approximately 1,200 cards.
In all other respects. Model 5
is identical to Model 4.
A card is read in three machine cycles. On the first cycle,
the card moves from the read hopper
to the read check
station. During the second cycle, the card passes through
the read check station, where a hole count
is established,
and stops at the read station. On the third cycle, the card
moves through the read
station~ the hole count is proved,
and data read from the card enters the processing unit's
core storage or, in Model 2, the read buffer. In all models
except 2, the card continues past the read station
to the
normal read (NR) stacker unless program-directed to stacker
1 or stacker 2 within 10 milliseconds after the read com-
mand. Model 2 has a separate prestacker station where the
card just read can await stacker selection without a time
limit (Figure 2).
IBM 1402 CARD READ-PUNCH
Joggler
Gate
Figure 1. Read Hopper, Models 1, 2, 3, 4, and 6
The read feed on Model 3 is equipped with an idle con-
trol timer
that turns off the read feed drive motor when-
ever 30 seconds elapse without a read command. The motor
restarts automatically when the next read instruction
is
issued.
Punch Feed
All models of the 1402 have a maximum punching speed
of 250 cards a minute. The actual number of card pro-
cessed depends on the processing time required between
punch commands. The punch hopper, at the left end
of
the 1402, has a capacity of approximately 1,200 cards.
5

Punch
Hopper Punches Punch
Check Select
Stacker
Pres tacker Station
Model 2
Select
Stacker
Read
Check
Read
Hopper
NormaIUUUUUNO~OI --~
Punch Read
~---
Blank
Station
Figure 2. Card Feed Schematic
NP
4
A punch operation requires four machine cycles. The
card moves from the punch hopper
to a blank station on
the first cycle. This blank station
is reserved for the reading
brushes associated with the Punch Feed Read special fea-
ture when that feature is installed on the 1402. During
the second punch cycle, the card passes through the blank
station and stops at the punching station. The card is
punched during the third cycle; a hole count is established,
and the card stops at the punch check station. On the
fourth punch cycle, the card moves through the punch
check station, where the hole count
is proved, then passes
into the normal punch (NP) stacker, unless program
directed into another stacker (see Figure 2).
Models 3, 4, 5, and 6 are equipped with a punch idle
control timer
that turns off the punch motor whenever 30
seconds elapse without a punch command. The punch
motor restarts automatically when the next punch in-
struction
is issued.
Stackers
The
IBM 1402 has five radial stackers (Figure 3), each with
a capacity
of approximately 1000 cards. Should a stacker
become full, the 1402 stops and a stacker light signals the
operator. Cards can be removed from a stacker without
interrupting the operation.
6
8/2
NR
Read
Figure 3. Radial Stackers
Cards from the read feed normally go into the NR
stacker,
but can be directed to stacker 1 or stacker 2 by
the program. Cards from the punch feed can be rerouted
from the NP stacker into stacker 4 or stacker 8 under
program control.
When programming a 1402, note
that cards from both
feeds can be selected to the common 8/2 stacker, but
machine timing considerations make merging operations
impractical on a standard 1402.

Models 1, 3, 4, 5, and 6
The keys, lights, and switches
on Models 1,3,4, 5, and 6
are alike (Figure 4). Several
of the controls are common
to the entire 1402; others are specifically for the reader
or punch portions.
Common Controls
Start Key* is used to initiate machine operation after a
manual, programmed, or automatic stop.
Stop Key*
is used to stop the system. If a program step
is in process, it is completed before operation stops.
Check Reset Key must be pressed
to reset any punch or
read error indication (punch check, reader check, punch
stop, reader stop, transport error, or validity error),
so that
the start key will be effective for resuming operation. The
check reset key
is effective only when the feed unit in
which the error occurred is cleared
of cards.
Power Light is on when power is supplied
to the machine.
Fuse Light,indicates
that something in the 1402 circuitry
caused a signal fuse
to burn out. A customer engineer
should be notified.
Transport Light indicates a card jam in the transport area.
After the card jam is cleared, the light turns off. Any cards
beyond the read brushes in the read feed
(or the punch
check brushes in the punch feed) have been read (or
punched) and checked.
*Interchangeable with the same key on a system console or on
an
IBM 1403 Printer.
PUNCH
OFF
PUNCH
ON
NON PRO
RUN OUT
PUNCH
CHECK
PUNCH
STOP
FUSE
CHIPS
STACKER
Figure 4. Operator Controls, Models 1, 3,4,5, and 6
CHECK
RESET
OPERATING CONTROLS AND PROCEDURES
Stacker Light signals that a stacker is full. When enough
cards are removed
to allow the stacker slide to return
beyond the stacker trip device, the stacker light turns
off. Operations can be resumed
by pressing the start key.
Reader Controls
Load Key is used to start the loading of program instruction
cards in the read feed. Pressing the load key operates
the
read feed until a card has passed the read station. The
read-in area (positions 1-80
of storage) is automatically
cleared, and a word mark is set in address 001.
After the first card is read at the read station, the
program begins
by executing the instruction punched in
the first columns
of the card. Continued operation, in-
cluding further feeding and reading
of program cards,
is under program control and does not require operator
intervention.
When the punch
onloff switch is on, operating the load
key also starts the punch.
Nonprocess Runout Key (NPRO) is used to clear cards from
the read feed. The key
is operable only when the read
hopper and
me feed tray are empty (or manually prevented
from feeding cards), and the joggler gate is closed. In normal
circumstances the last two cards
that enter the NR stacker
have not been read.
Note: The NPRO key should be operated before loading
cards into the read feed for the first time after power has
been turned on.
Reader Stop Light signals a card-feed failure, a card jam,
or a clutch failure.
It also comes on if the NPRO key has
been pressed. The stop light can be turned
off by pressing
the 1402 check reset key after the condition causing
the
stop has been corrected.
POWER
TRANSPORT
VALIDITY
READER
CHECK
READER
STOP
NON PRO
RUN OUT
READER
OFF
READER
ON
7

Reader Check Light turns on if (1) a hole-count error is
corrected during card reading or (2) the read release
time
is exceeded without the issuance of a read command.*
This light can be turned off by performing an NPRO opera-
tion, then pressing the 1402 check reset key. When opera-
tion stops and the reader check light is on, the last card
in the NR stacker has
not been processed and must be re-
entered after the error is corrected.
Validity Light turns on
if an invalid character is detected
during a read operation. The system stops at the end
of
the read. The validity light can be turned off by pressing
the 1402 check reset key.
If the invalid punching in the
card also causes a parity error, the process and storage
lights on the system console also turn on.
When the validity light
is the only 1402 light on when
the stop occurs, the last card in the NR stacker has
not
been processed and must be re-entered after the error has
been corrected.
If the I/O check stop switch on the system
console
is off and a validity error is detected during a read
operation, the validity light turns on
but the operation does
not stop. A reader error indicator is available for program
testing and reset with the I/O check stop switch off.
Note: When the Punch Feed Read special feature
is in-
stalled, the validity light can also indicate invalid punching.
Reader On/OffSwitch controls the read feed of the 1402.
When the switch is off, the read feed is inoperable.
Punch Controls
Nonprocess Runout Key (NPRO) is used to clear the punch
feed
of cards when the hopper is empty. Of the last three
cards in the
NP stacker after a normal nonprocess runout,
the first has
not been checked and the last two have not
been punched. The NPRO key should be operated before
loading cards into the punch feed for the first time after
power has been turned on.
*This is a programming problem. After a program using the
Read Punch Release special feature has been completely
checked, this condition should
not occur.
Model 2
PUNCH
READY
PUNCH
CHECK
CHIPS STACKER POWER
Punch Stop Light signals a card-feed failure, a card jam,
or a clutch failure;
it also comes on if the NPRO key has
been pressed. The light can be turned
off by pressing the
1402 check reset key after the condition causing the stop
has been corrected.
Punch Check Light turns
of if (1) a hole-count error is
detected in the punch feed, (2) either the A-register or the
B-register detects a parity error during a punch operation,
or (3) punch release time
is overextended.*The punch
check light can be turned
off by performing an NPRO
operation, then pressing the 1402 check reset key.
Chips Light turns on and the 1402 stops when the chip box
is full or improperly positioned. The light turns off after
the condition
is corrected. Operation can be resumed by
pressing the start key.
Punch On/OffSwitch controls the punch feed. When
the
switch is off, the punch is inoperable; when on, andall the
interlock circuits in the punch are satisfied, the machine
operates.
Model 2
Figure 5 shows the operating keys and lights for the 1402
Mode12.
Common Controls
Stacker Light indicates a full stacker. Tro reader unit and
the punch unit
both stop when a stacker becomes full.
Fuse Light indicates a blown fuse in the reader or punch
unit. A customer engineer should be notified
of the
occurrence.
Power Light indicates that power is being supplied to the
1402.
Transport Light indicates a card jam in the stacker area.
All card feeding in the 1402 stops until the jam
is removed.
VALIDITY
READER
READY
READER
CHECK
PUNCH
STOP
FUSE TRANSPOR T
READER
STOP
Figure 5. Operator Controls, Model 2
8

Reader Controls
Reader Start Key (initial operation) feeds three cards into
the read feed, mls the reader buffer with the contents
of
the first card, and turns on the reader-ready light. During
an operation, pressing the start key after a reader stop
condition turns on the reader-ready light, and allows cards
to continue feeding under program control. Whenever cards
are removed from the read feed hopper and the end-of-me
key
is not operated, pressing the start key moves the re-
maining two or three cards
to the stacker area. This runout
operation requires
that the joggler gate be closed.
Reader
Sto~ stops the reader and turns off the reader-
ready light.
End-of-File Key causes the end-of-file latch in the channel
to be turn(~d on after data transfer from the last card. The
next read instruction
is interpreted as a NO-OP and reports
the end-of.·me condition
to the channel. This key is back-
lighted.
Whenever the end
.. of-me key is pressed, the card reader
operates in one
of these ways:
1. With four or more cards in the read hopper, all cards
are processed and run into a stacker. Operating the
stop key or processing the last card causes the end-of-
me condition to be reset.
2. With three cards remaining in the feed, a card-read or
card-feed instruction before operation
of the end-of-
me key causes the program to set the not-ready I/O
channel status indicator. Pressing the end-of-me key
and then the start key allows the last three cards
to
be processed and lun into a stacker. Operating the
stop key or processing the last card causes the end-
of-me condition
to be reset.
3. With one, two, or three cards in the read hopper,
pressing theend-of-me key and then the start key
feeds the card or cards, and turns on the reader-
ready light after the first card passes the second
read station. The card or cards are processed and
run into a stacker. Operating the stop key or
processing the last card causes the end-of-me
condition
to be reset.
Reader Ready Light indicates
that the reader is either
operating or ready
to operate under program control.
Validity Ligh! shows that an invalid character has been
detected during a feed operation. The light remains on
until the next feed instruction
is started. During the read
instruction, the invalid character
is transferred to storage
along with valid data.
Reader Stop Light indicates a feed failure or card jam
during a feed operation. When this occurs, the reader
stops and the reader-ready light turns off.
Reader Check Light indicates the detection
of a hole-count
error, parity error, or buffer timing error during a data
transfer operation. The light remains on until the next
feed instruction
is started. During the read instruction,
the data
is transferred from buffer to storage, and the
processing unit turns on a channel indicator for the
program
to test.
Punch Controls
Punch Start Key is used to feed two cards into the punch
feed and turn on the punch-ready light. After a punch
stop condition, pressing the start key turns on the punch-
ready light, and allows punching
to resume under program
control. When the cards have been removed from the punch
feed hopper, pressing the start key moves the three cards
remaining in the punch feed
to the NP stacker. The first
card that enters the
NP stacker is unchecked; the other
two are unpunched.
Punch Stop Key
is used to stop the punch. It turns off the
punch-ready and end-of-me lights.
Punch Ready Light indicates
that the punch is either
operating or ready
to operate under program control.
Punch Stop Light indicates a feed failure or card jam
during a punch operation. When this occurs, the punch
stops and the punch-ready light turns off.
Punch Check Light indicates the detection
of a hole-count
error, parity error, or buffer timing error during a punch
operation.
Chips Light shows that the chip box is full or not in place.
The light goes
off when the condition is corrected. To
resume operation, the reader start key must be pressed.
Restart Procedures
The restart procedures in this publication apply mainly to
Models 1, 3,4, 5, and 6. These models usually require
operator attention when error conditions arise. Procedures
for restarting Model 2 are explained in the SRL publications
for the appropriate system. This model requires a minimum
of operator attention, because most error correction rou-
tines can be programmed.
9

Reader Errors
Errors detected in the read feed cause the reader stop,
reader check, or validity lights
to come on, either singly
or in combination.
Reader Check Light On
1. Remove cards from the read feed hopper.
2. While lifting cards in the me feed to prevent them
from feeding into the lower magazine, run the two
cards
out of the read feed by use of the NPRO key.
3. Press CHECK RESET on the 1402.
4. Remove the last three cards from the NR stacker.
Check and, if necessary, correct the first card. If a
hole-count error has occurred, use a storage scan
operation
to determine the position in error.
S. Place the three cards removed in step 4, then the
cards removed from step 1 into the read feed
hopper.
6. Press START.
Reader Stop Light On
When operation stops because of either a card feed failure
or a card jam, and only the reader stop light is on, cards
in the stackers and beyond the reading brushes in the
read feed have been processed.
If the reader stop light is
on and neither a feed failure nor jam exists, a clutch failure
has probably occurred.
Th e last card in the NR stacker and
any other cards past the reading brushes in the read feed
may
not have been processed.
1. Remove cards from the read hopper.
2. Remove any jammed cards from the read feed (refer
to
"Card Jam Removal" in this publication).
3. While lifting cards in the me feed to prevent them from
feeding into the lower magazine, run any undamaged
cards
out of the read feed by use of the NPRO key.
4. Press CHECK RESET on the 1402.
S. Duplicate any damaged cards.
6. Place in the read hopper any cards
that were in the
read feed between the read check and read stations,
and replace the cards removed from the hopper in
step
1.
7. Press START.
Validity Light On
When this light is on and a feed cycle has occurred in the
read feed, the last card in the NR stacker contains invalid
character. This card has
not been processed. To correct and
refeed the error card, follow the same procedure
as de-
scribed for "Reader Check Light" (except for the storage
scan operation mentioned in step 4).
10
Reader Stop/Reader Check/Validity Lights On
Whenever the reader check or validity light comes on with
the reader stop light, the last card in the NR stacker caused
the error and must be refed. However,
if the cause of these
lights is a card jam between the read station and the stacker,
the cards must be examined
to determine which card was
the last card correctly processed; all cards following
that
card must be refed.
1. Remove cards from the read hopper.
2. Remove any jammed cards from the read feed.
3.
While lifting cards in the file feed to prevent them
from feeding into the lower magazine, run any un-
damaged cards
out of the read feed by use of the
NPROkey.
4. Press CHECK RESET on the 1402.
S. Duplicate any damaged cards.
6. Replace cards in the
read- hopper in this order.
a. The last card stacked in the NR pocket.
b. The cards removed or run
out from the read feed,
in their original order.
c. The cards removed from the hopper.
7. Press START.
Punch Errors (1402 Models
1, 3, 4, S, and 6 Without Punch
Feed Read Special Feature)
Punch Check Light On
1. Remove cards from the punch feed hopper.
2. Run out the three cards in the punch feed.
3. Press CHECK RESET on the 1402.
4 Remove the last four cards from the NP stacker.
S: Visually check the first of these four cards (discard
the other three), and correct,
if necessary. If the B-light
on the system console
is on (indicating a B-register
parity error), perform a storage scan operation, starting
at position 101,
to determine and correct the position
(l01-180) that contains the parity error. Note the 1-
address for restarting after the scan.
6. Replace the cards removed from the punch feed hopper
in step
1. .
7. To resume operation, enter the address of punch opera-
tion code, set the mode switch
to RUN, and press
START. The last punch cycle repeats and information
in the punch storage area
is repunched.
Punch Stop Light On
1. Remove cards from the punch feed hopper.
2. Remove any jammed cards from the punch feed and
run
out any undamaged cards.
3. Press CHECK RESET on the 1402.
4. Discard the last card punched, because the data will be
repunched.
S. Duplicate any damaged cards.