CARD PUNCHES, VERIFIER, DATA TRANSCEIVERS
49.7 X Figure 4-13.-Transceiver control unit
key and the reset key at the receiver turns out the start light and prevents further card recep-tion until the start key is again depressed.
Start Key.-This key serves two purposes.
When the machine is used to receive, depression of this key lights the .start light on both machines as a signal that the receiver is ready to operate.
When the machine is used to transmit, depres-sion of this key starts operation, provided the start light is ON and cards have been fed into both machines.
Feed Key.-Depression of this key causes a new card to feed from the hopper into the card bed. Before any operation can be started, this key must be depressed twice in order for one card to be at the punching station and a second card at the pre-registration station.
Release Key.-The release key must be depressed to feed a third card into the trans-ceiver after the feed key has been used to feed the first two cards. Before the operation can proceed, the receiver must have a card at the
MACHINE ACCOUNTANT 3& 2 reading station, a second card at the punching
station, and a third card at the pre-registration station. The transmitter needs a card only at the reading station.
The "release key is used during an operation to clear the card bed. If the repeat light is OFF, depression of this key on either machine releases one card and feeds the next. Any columns which are programmed for duplication in either program card are duplicated during·
release. If the repeat light is ON, depression of ~his key on the transmitter automatically ej ects all three cards from the card bed to the stacker without feeding any new cards, thus clearing the card bed. Duplication is suspend~d
unless the blank column light is ON, in which case any columns which are programmed for duplication will be duplicated only into the first card released.
Power Light.-Approximately one minute after the power switch has been turned on, the power light will glOW, indicating the machine is ready for use. end-of-transmission or tel key, along with the interlock key, at. either machine.
Repeat Light. - The repeat light glows on both machines when any check or transmitting failure occurs. The light will come on at the transmitter after any2--second delay during transmission and at the receiver after 4
sec-ond~. A buzzer also rings to draw the attention of the operator to the condition.
Blank Column Light. - This light glows when-ever a blank column is transmitted or received.
Operation of the blank column check may be suspended by appropriate control punching in the program card.
Character Check Light.-This light will glow in the receiver whenever the character check is not satisfied, thus stopping the receiver before it punches the column in~ error. The transmitter stops at the end of the card, and the repeat light glows after a 2-second delay. The repeat light at the receiver will come on after a 4-second delay. The character check light in the
trans-mitter . also glows if the transmitter fails to receive the correct code for either the start signal at the beginning of a card or the restart signal at the beginning of a field. The character check light may be turned off by depressing the release key.
Tel Light.-The tel light glows on both machines and the buzzers ring when the tel key of either the transmitter or the receiver is depressed. This light is a signal that com-munication· by alternate service is desired This light and the buzzer are turned off by depressing the reset or release key.
End-of-Transmission Light.-The end-of-transmission lights on both machines will glow and the buzzers will ring when the end-of-transmission key on either machine is de-pressed. Depression of the reset or release key on either machine turns this light out and the buzzer off.
Card Check Light (receiving only).-This light comes on when the internal card check indicates that an incorrect number of columns has been received. The· transmitter stops at the end of the card being transmitted and the repeat lights on both machines come on. The card check light can be turned off only by de;..
pressing the release key.
Program Unit
All functions of the data transceiver are controlled by a program card mounted on a program drum. The operation of the program unit is similar to that in card punches. The difference lies in the functions that each of the program card codes control. Two program cards are required for each transmission. One card is used with the transmitter, and the other with the receiver. The control punching required in the program cards depends on the functions to be controlled, such as transmitting, skipping, and duplicating. The following is a summary of the program codes used for data transceiving:
Code
Chapter 4-CARD PUNCHES, VERIFIER, DATA 1RANSCEIVERS Code Transmitting Receiving
6 Variable End of End of Card Card
8 Transmit Delayed Start
9 Restart Restart
12. (Field Definition.) A 12 is punched in the program card for every column of each field except the high order position. These 12 punches serve to continue to the end of the field any transmission, skip, or duplication started within that field.
11. (Skip.) An 11 punched in the program card in the high order position of any field starts a skip, which is continued over the field by the 12 punches in the remaining columns of the field. In the transmitting program card, the 11 punch should accompany the 5 end-of-card punch, and the 12 punches should be punched in all remaining columns in order to skip the cards out to column 81. (Column 81 is that portion of . the card just to the right of column 80. It is not used for normal card punching.)
O. (Duplicate.) A zero punched in the high order pOSition of any field in the program card starts duplication, which is continued over that field by the 12 punches in the remaining columns of the field. No more than 30 consecutive columns should be duplicated.
1. (Space Check.) An attempt to transmit blank columns normally turns on the blank column check light and stops transmission.
When blank columns are to be read in the posi-tion of a field always prints, unless all printing is suppressed.
3. (Print Suppress.) Even with the print switch ON, printing can be prevented for one or more columns of the card. Print suppression is controlled by a 3 punched in the program card in each column for which print suppression is desired. Printing by. the transmitter is internally suppressed except during duplication, at which time it is under the control of the print switch or the program card.
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4. (Skip Control.) Skipping can be controlled whenever an 11 punch is read or punched in a transmitted or received card, either singly or in combination with other punches. This type of skipping occurs when a 4 is punched in the program card in the column where X skipping is to be started.
5. (End-of-Card.) A 5 punched in the trans-mitting program card causes the end-of-card signal to be sent. This control is punched in the program card in the column following the last column to be transmitted. When column 80 is transmitted, the signal is sent automatically;
thus no punching in the program card is neces-sary. re-ceived at any other column, the machine signals an error and stops.
6. (End of Card.) A 6 may be punched in the receiving program card in place of a 5.
In this case, if the end-of-card Signal is re-ceived at a column containing the 6, the card is released automatically without punching an 11. If the Signal is received at any other column, the machine signals an error and stops.
All receiving cards which satisfy the machine check circuits are punched with a 12 in column 11 punch in the transmitted card and the 6 punch in the program card, the transmitter will send the end-of-card signal and skip the" card to column 81.
MACHINE AC~OUNTANT 3 & 2 At the receiver, reception of the end-of-card
signal at a column of the program card punched with either a 5 or 6 will satisfy this check. If the signal is received at any other column, an error will be signalled.'
8. (Transmit.) Transmission starts auto-matically at any column in which an 8 is punched in the transmitting program card. Transmis-sion is continued over that field by the 12 punches in the re'maining columns of the field.
8. (Delayed Start.) If skipping or duplicat-ing is to be performed at the receiver before transmission can start, the receiver end-of-card signal must be delayed until the end-of-card to be punched is in position to receive the punch-ing. An 8 punch causes the signal to be sent at the column in which it appears in the receiv-ing program card, which is the first column to be punched through transmission.
9. (Restart.) This control allows for dupli-cating or skipping the received card indepen-dently of the. transmitted card. For example, punching of transmitted data can be delayed between fields while the receiver duplicates or skips over a field. A 9 in the receiver program card, in the column following the last one pro-grammed for skipping or duplicating, causes a restart signal to be sent to the transmitter.
When the transmitter receives this Signal, it resumes transmission at the column in which a 9 is punched in the transmitting program card.
OPERATING PROCEDURE
Before any cards can be transmitted or received, the operators at the two locations must communicate by telephone or telegraph-printer in order to coordinate the work and to 10. The following procedure should be followed to set the receiver levels: the machine set to transmit, indicating that the transmitter is sending the correct signal.
3. Rotate the receive level knob on the NEON INDICATOR TELEPHONE
ELECTRONIC SIGNAL UNIT
49.8 Figure 4-14.-Telephone signal unit controls.
until the receiving neon indicators just begin
After the work has been coordinated and the receive levels set, transmission can proceed as follows:
1. Set receiver switch to RECEIVE and transmitter switch to 1RANSMIT.
2. Insert program drums, with proper pro-gram cards, into the machines.
3. Receiver operator then feeds three cards into position, and sends the start signal.
4. Transmitter operator feeds three cards into pOSition, and depresses the start key. Auto-matic transmission then begins.
5. After the last card has been transmitted, the start lights on both machines will glow. The transmitter operator depresses the end-of-transmission key, and the operation is finished.
ERROR CORRECTION
Whenever the repeat light goes on during transmission, the following steps should be taken.
Transmitter Procedure
1. Depress the release key. This turns off the buzzer and the repeat light, and clears the card bed.
Chapter 4-CARD PUNCHES, VERIFIER, DATA TRANSCEIVERS 2. Replace the last three released cards in
front of the cards in the feed hopper.
3. Depress the feed key twice and the re-lease key once to feed three cards into position.
4. Automatic operation may be continued column 81, and may be easily removed from the correct cards later.
2. Signal the transmitter to proceed with automatic operations by depressing the start key.
OPERATING NOTES
1. If either the tel light or end-of-trans-mission light is ON, the reset key must be depressed before the operation can be resumed.
2. If automatic operations must be stopped in the middle of a group of cards, the stacker switch should be used. This ensures that the card being transmitted will be completed cor-rectly.
AL'IERNATE PROGRAM-A special feature de-signed to handle two types of cards in one punching operation; specific codes identify the alternate mode.
AUTOMATIC OPERATION-An action per-formed or executed independently of manual operations; normally dependent upon certain conditions.
CARD PUNCHING-The basic method for con-verting source data into punched cards; read-ing a source document and depressread-ing keys to convert information into punched holes; see keypunching. check light glows in the receiver immediately.
The repeat light and buzzer will come on in the transmitter after a 2-second delay, and in the receiver after 4 seconds. To restart automatic operations, turn the stacker switch ON and fol-low normal error correction procedure.
4. If the stacker switch in the transmitter is turned off, the start lights in both machines will glow. To restart automatic operations, turn the stacker switch ON and follow normal error correction procedure.
5. If the transmitter operator requests a manual start signal because of failure to receive a start Signal, the receiver operator should void the last card received, even though the start light is ON and 12 punch in column 81 indicates the card is correct. This card will be transmitted again when the three cards at the
CARD BED-A flat plate over which cards travel from hopper to stacker.
CARD LEVER/PRESSURE FINGER-A lever for electrically detecting the presence of a card along the card path or bed.
CHIP BOX-A container that holds the punched-out chips from the punches.
COLUMN 81-The remaining portion of a card to the right of column 80; not usedfor normal card punching.
COMBINATION KEYS-Can be depressed in either alphabetic or. numeric shift; keys 19-29; numbers, special characters, and alpha-betic letters.
FUNCTION CONTROL SWITCHES-uON" and ttOFF" toggle switches which control auto-matic functions; see toggle switch.
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MACHINE ACCOUNTANT 3 & 2 FUNCTIONAL KEYS-Can be depressed to
con-trol machine functions in conjunction with, or independently of, the program unit.
INTERLOCK-A means of preventing machine operation until· required mechanical or elec-trical conditions are met; see keyboard lock-ing.
KEY VERIFYING-Manually operating a key-board device (verifier) to ascertain the conformity of punched information with the source information; contrasted with visual or automatic verification through machine cir-cuitry and panel Wiring.
KEYBOARD LOCKING-An interlocking of a keyboard because of improper' operation or keying.
INDICATORS-Devices which register condi-tions; operations may be varied according to the position of an indicator.
KEYPUNCHING-Manually operating akeyboard device that punches holes in cards represent-ing definite configurations of' letters, digits, and special characters; contrasted with auto-matic punching through machine circuitry and panel wiring.
LEFT ZERO PRINT-Printing zeros in a nu-meric field to the left of a high order signifi-cant digit.
MULTIPLE PUNCH-More than one digit per column; normally representative of specific letters or special characters.
OFF-PUNCHED-Punching not properly posi-tioned in a card.
OPERATION-A specific action of a machine or device performed automatically when so in-structed.
PROGRAM CARD-One punched with specific coding and placed around a program drum to control automatic operations; basic part of the program unit.
PROGRAM CODES-Specific ,codes punched in a card to control machine functions automati-cally.
PROGRAM CONTROL-A method 'capable of automatically directing, holding, and making changes in the operation of a device; normally based on a prescribed sequence of events.
PROGRAM CONTROL LEVER-Controls opera-tion of the program unit; places program control in either "on" or "off" status; a component of the program unit.
PROGRAM DRUM-The revolving cylinder on which a program card is mounted; a com-ponent of the program unit.
PROGRAM UNIT-Comprises four main com-ponents: program card, program drum,senS-ing device, and program control lever;
functions to allow certain repetitive operations automatically.
PUNCHING KEYS-Can be depressed only when in alphabetic shift; keys 1-18; letter keys.
READING BOARD-The space provided for source documents from which cards are punched.
SENSING DEVICE-A mechanism which rides along on the program card from column to column to detect holes; a component of the program unit.
SKIPPING-Advancing past columns not to be punched; performed automatically under pro-gram control or through key depression.
SPECIAL CHARAC'IER KEYS-Can be de-pressed in either alphabetic or numeric shift; keys 40-43; punch special character configurations only.
STAR WHEELS-Rotating contact wheels that read the program card; the sensing device of the program unit.
'STATION-Any position along a card feed, path, or bed, where a card is processed; see veri-fying station.
TOGG LE SWITCH-A manually operated electric switch that may be placed in an "on" or
"off" position and remaining in that position until changed; contrasted with an electronical-ly operated circuit switch.
TRANSC EIVER-A machine which automatically converts and transmits punched card data (normally between remote locations) in the form of coded electrical impulses over tele-phone or. telegraph lines, and receives and reconverts such impulses into punched cards ..
TRANSCEIVER CONTROL UNIT-Cable con-nected to a card unit; contains switches, keys, and Signaling lights essential to the operation of the transceiver.
TRANSCEIVER SIGNAL UNIT-Cable connected to a card unit; contains electronic circuits for transmitting and receiving coded impulses over telegraph or telephone wires.
VERIFICATION NOTCH...;..A crescent shape cut in the edge of a card; its position Signifies erroneous or correct columnar punching.
VERIFYING STATION-The first of two stations in the card bed of the verifier; employs the use of sensing pins to verify the accuracy of the initial punching.