JPS5972582A - Data input and output device - Google Patents

Abstract

PURPOSE:To prevent the burning of a magnet despite of a fault of an instruction system for a portable data input/output device from numerical control, by applying the control signal to the magnet of a print head only in a normal print mode. CONSTITUTION:A switch control circuit 6cf of a gate circuit 6ce turns off all switches after the time equivalent to the 1-row print elapses. Therefore no control signal is applied thereafter to magnets M00-M06. If an instruction system has a fault after the printing is through with a row, the control signal is produced from a register 6cd to turn on all magnets M00-M06. Even in such a case, the switch is never turned on unless a set signal is applied to the circuit 6ce. Thus no voltage is applied to the magnets M00-M06, so that the burning of the switch is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a system that can be separated from the main body of a numerical control device.
Regarding i15 data input/output device.

In numerical control, a host computer is sometimes used to perform various data processing to create machining command data for a workpiece. Data created by the host computer is recorded on paper tape by a tape puncher, and this paper tape is used as a recording body as input information for other systems. Additionally, when creating a paper tape, a printer is used to print out the contents in order to record the contents. Normally, when output from a host computer is recorded on paper tape or printed on recording paper, a paper tape puncher and a printer are used, each of which is provided separately from the main body of the host computer. These devices are connected to a host computer and operate only according to instructions from the host computer. Unlike such a system in which each peripheral device is separate, when it is connected to the host computer, it operates based on its commands, and when it is disconnected from the host computer, it independently reads the contents of the paper tape and operates this computer. A system that performs copy printing is also conceivable. However, such systems are intended for a very limited number of systems and may not be applicable to other systems, and even if they can be applied, it may be necessary to change the host computer software. There must be,
There was also an inconvenient aspect. Additionally, the printers used in this type of system are typically wired dot links. This wire dot printer uses several vertically arranged wires to push each one toward the printing paper using the force of a magnet, thereby pushing an ink ribbon onto the printing paper and printing by a collection of dots. By the way, the magnets of wire dot printers are made small and lightweight in order to improve the interlocking of the print head, and are rated for short periods of time. For this reason, if the command system such as the central processing unit (CPU) breaks down and a voltage is applied to the magnet of the wire dot printer for a long time, the magnet will burn out and the printer will also malfunction.

Therefore, the present invention is a data input/output device for a numerical control system, which is provided separately from a host computer and integrates a tape puncher, tape reader, and printer, so that it can be used even if a failure occurs in the command chain. The purpose of the wire dot printer is to provide a data input/output device for a numerical control device that does not cause any failures.

Next, one embodiment of the present invention will be described in detail using the drawings.

FIG. 1 is a block diagram of a data input/output device according to the present invention. In the figure, 1 is a control device, 2 is a one-drive Φ-only memory (hereinafter abbreviated as ROM) that stores programs necessary for the operation of a data input/output device, and 3 is data read from a paper tape, etc. 4 is a tape reader, 5 is a tape puncher, 6 is a wired printer, and the data read by the tape reader 4, the tape puncher, etc. The data printed in step 5 or the data sent from the host computer is printed. Reference numeral 7 denotes a control panel, which has character keys, a numeric keypad, function keys, and the like. In particular, the host
The data input/output device according to the present invention has an operation changeover switch that allows the data input/output device according to the present invention to operate according to a command from the computer or independently. 8 is an interface circuit with the host computer, and 9 is a switching circuit.

The device shown in FIG. 1 can perform the following operations only within its own device. First, data keyed in from the operation panel 7 can be immediately printed out using a printer, and this data can also be stored in the RAM 3. It is also possible to correct errors in the data stored in the RAM 3 after checking the printed results. Also, after this correction operation, print out the data stored in RAM3, and
Paper tape can also be perforated. Furthermore, the data read from the tape reader 4 can be printed out from the printer 6, the paper tape can be punched by the tape puncher 5 to make a copy of the paper tape, and these operations can be performed simultaneously. can.

In addition, the device shown in FIG. 1 is connected to the host group computer side by switching the operation changeover switch provided on the operation panel 7 and turning on the switching circuit 9. Alternatively, the data can be transferred to the host computer side without going through it, and the data transferred from the host computer side can also be recorded on paper tape from the tape puncher 5 or printed out from the printer 6. You can also do it.

FIG. 2 is a block diagram showing the configuration of the wire dot printer 6. As shown in FIG. In the figure, 6a is a data buffer;
b is a decoder that decodes the print data transferred from the control device 1, 6c is a printer control circuit, and 6d is a printing unit, which usually has seven printing wires arranged vertically, and seven pieces that push out each of these wires. It has a print head with a magnet.

FIG. 3 is a block diagram showing details of the printer control circuit 6c and printing section 6d of the wire dot printer 6. Third
In the figure, 6ca is a register that temporarily stores the number of characters printed in one line, 6cb is a hit counter that counts the number of characters in one line, 6cc is a decoder, 6cd is a register that stores the number of characters printed in one line, and 6ce is a gate circuit. It has seven switches and a switch control circuit 6cf that turns on and off these switches all at once. When one pulse of the cent signal is applied, this switch control circuit 6cf turns on the switch for a certain period of time, for example, the time it takes for the print head to print one line, or a little longer than that, and then turns the switch on after that time. Turn off. In the printing section 6d, 6da is a print head, which has seven magnet MOs.
o to MO6, seven wires 6db pushed out by these, and a head portion 6dc in which the tips of these wires are vertically arranged.

Next, the operation of the wire dot printer 6 will be explained.

First, print data sent from the control device via the data bus DB is stored in the data buffer 6a and then sent to the decoder 6b, and the data transferred by the decoder 6b is either data indicating the number of prints or print characters. Determine whether the data indicates.

The number of prints per line data is stored in the register 6ca, and the print character data is stored in the register 6cd.

Next, when a print number set signal is applied to the hit counter, the print number in the register 6ca is set in the counter. On the other hand, the print number cent signal is also sent to the switch control circuit 6.
cf is applied as a sen] signal. Therefore, the switches of the gate circuits 6ce are turned on all at once. At the same time, print data is read character by character from the register 6cd, and this data is applied as a control signal to the magnet of the print head 6da through the switch of the gate circuit 6ce. Therefore, the magnet to which the control signal is applied is energized for a short period of time to push out the wire 6db, and its tip is pushed out from the hand portion 6dc toward the printing paper to perform dot printing. When one character is printed, only one resultant pulse (indicating the end of printing) is sent to the hit counter 6cb, and its count value is subtracted by 1. When such a printing operation is repeated and one line is printed, the count value of the hit counter becomes all zero, and the decoder 6cc detects this and outputs a line feed command to the printing section 6d. A revision action is taken. The switch control circuit 6cf of the gate circuit 6ce turns off all the switches when the time for printing one line has elapsed. For this reason, magnet MOO~MO
No other side control signals are applied to B from now on. Here, when printing on the next line, the same operation as described above is repeated from the beginning. After the printing operation for one line is completed, even if the command chain fails and, for example, a control signal is issued from the register 6cd that turns on all magnets MOo to MOe, the cent signal will be sent to the gate circuit 6ce. The switch will not turn on unless applied to
Since no voltage is applied to the magnets MOO to M06, an accident such as burning out of these does not occur.

In the second embodiment, the print number set signal is used as the set signal for the switch control circuit 6cf of the gate circuit 6ce, but in addition to this, a signal for starting the printing operation, such as a print start signal, may be used. Can be used as a set signal.

As explained in detail above, the present invention not only enables a data input/output device to operate in response to instructions from a host Φ computer to create paper tapes, print out transferred data, and input data, but also enables It is equipped with a processing function that allows you to create paper tapes with your own programming and print data on paper tapes, so it can be used as a portable data input/output device that can hold several numerical control devices. It is suitable. Furthermore, wire dot printers are configured so that control signals are applied to the print head magnets only when normal printing operations are being performed, so if a failure occurs in the command chain of the wire dot printer, voltage is continuously applied to the magnets. Even if an incorrect control signal is applied, no voltage will be applied to the magnetoft, and it will not burn out.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a data input/output device according to the present invention, Fig. 2 is a block diagram showing the configuration of a wire dot printer 6, and Fig. 3 is a block diagram showing the main parts of the printer control circuit and printing section of the wire dot printer. It is a diagram. l...Control device 2, ROM3, 4 RAM
4... Tape reader '5... Tape puncher 6... - Wire dot printer 7... Operation panel 6b, Decoder 6C, Printer control circuit 6ca and 6cde * Register 6cb * Hit counter 6cc, Hit counter 6ce. Gate circuit 6cf, switch control circuit 6d, printing section MOO~MOf3, magnet Applicant Fanuc Co., Ltd. Agent Patent attorney Minoru Tsuji (2 others) 1st page 2nd figure

Claims (1)

[Claims] It is a data input/output device that is equipped with a tape puncher, tape league, and printer, and can also be operated by commands from outside.The wire dot printer has a device that is opened for a predetermined period of time in response to a print start signal and sends a print control signal to the magnet in the print section. A data input/output device comprising a gate circuit that connects an applied circuit only for a predetermined time.