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Programming Auxiliary Drum
No program control is used for either auxiliary duplication
or auxiliary control. The program card can therefore be left
blank in suchfields. It is advisable though, to punchfield
definition 12(4)-punches in all but the high-order column of
an auxiliary dup field to permit optional skipping of these
fields on impulse from the system.
Read-In
When desired, the 545 may be used as an input card reader,
provided the read-in special feature is installed. Fields of a
card or the entire card may be read as the card passes through |
the master station. The information read from thecardis
placed on the interface lines to the system (Hubs AK-AX,
Figure 35). A maximum of three holes per columnis per-
mitted. (This limitation may not apply if the using system
provides the power and signal source.)
The read-in operation, similar to the autopunch operation,
requiresastart signal from the system. Reading and card move-
ment begin when the system impulses "start read-in' (Hub AH,
Figure 35). Reading continues untikstopped:in any column
by impulsing "stop read-in" (Hub AJ, Figure 35) in that col-
umn. The card stops in the next column, if desired, but more
likely, begins a programmed skip to the next read-in field.
The start and start read-in signals must be issued again in the
first column of the next field to be read; likewise, the stop
read-in signal must be issued in the last column of thefield.
At least one start read-in and one stop read-in is required for
each card. Blank columns may be read instead of skipped,but
skipping long fields saves time.
The read-in feature may also be used with autopunchingas
a means of checking the punched output. While fields are
autopunched at the punchstation, corresponding fields may
be read at the read station. The system can, thereby, de-
termine if a card has been punched in error. If so, the sys-
_tem mayissue theerror signal (Hub BV, Figure 35) to alert
the operator and stop card processing (see "Error Conditions'').
Processing is resumed after the system issues the drop error
signal and the next card is fed by impulse from tlie system
or by the operator pressing the feed key.
_ Programming Read-In
Normally, only card reading and skipping are performed dur-
ing a read-in operation; but read-in fields can be intermixed
with otherfields in an autopunch operation, as for example
when read-in is used for checking purposes (see "'Program-
ming' in the autopunch modesection). Fields to be read do
not require punching in the program card. However, read-in
fields may be punched with 12(4)'s to allow optional skipping
of such fields on impulse from the system.
|
Where read-in is used concurrently with autopunching, the
program card is punched for the autopunch operation.Fields
to be skipped should be punched with an 11(5) in the high-
order column of the field and 12(4)'s in the remaining col-
umns of the field (see Figure 36).
Note: If skipping is to start in column 1, the system must
issue the start signal in the first column to be read and prior
to the start read-in signal.
Self-Checking Number
The self-checking number modulus 10, self-checking modulus
11, and self-checking number generator features may be used
in autopunch mode. The self-checking features function the
same in autopunchand keyboardcontrol fields as they do in
manual (keypunch mode) fields. The programmingis also
the same. See "Self-Checking" in the keypunch modesec-
tion.
PROGRAMMING
The program preparation required for each autopunch func-
tion is described with the function. Autopunch program
card preparationis similar to keypunch program card prepar-
ation. See "Programming" in the keypunch modesection.
Figure 36 summarizes the program card punching used by
the 545 Output Punch in autopunch mode. It is not intendec
to be a representation of a program card for anysingle ap-
plication, although it would function properly if used.
OPERATIONS
All controls for operating the 545 are located on the key-
board (Figure 7). Except for the slight variations in function —
presented here, the keyboard switches function the samein
both keypunch and autopunch mode. See "*Functional Con-
trols" in the keypunch modesection.
Indicators
The IBM 545 has two indicators on the keyboard:
Auto (White)
This indicator is on when the 545 is in the autopunch mode.
Check (Red)
This indicator, operative in the autopunch mode, indicates:
1. Card jam or card levers not closed (improper card move-
ment).
2. Program drumlever in off position (starwheels raised).
3. Stacker full condition, which prevents an auto feed cycle.
4. An error condition signal from the using system.
The check indication caused by an error signal from the
system is relieved by a signal from the system. The check
indication caused by a 545 condition is relieved by the op-
erator.
When thestackeris full, the operator empties the stacker
and presses the feed key.
If a card fails to feed from the hopper, the operator adjusts
the cards in the hopper and presses the feed Key to feed the
~ next card.
Autopunch Mode
39
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