JPS5868185A - Controller of printer - Google Patents

Abstract

PURPOSE:To reduce the consumption of forms, and to facilitate storage and retrieval by driving a printer only when a controller for program processing is abnormal. CONSTITUTION:A microprocessor constituting a controller 6 causes an interruption at specified intervals of time to run a test program. While the microprocessor is normal, a pulse is generated at every specified interval of time and when it becomes abnormal, no pulse is generated. The continuation time of the output of a monostable element constituting a fault detector 10 is set longer than the pulse time interval of an input and while pulses are inputted successively at the specified intervals of time, the output of the detector 10 is held at H to open the contact of a driver 11, so that a printer 8 is not in operation. If the controller 6 becomes abnormal and any pulse is not generated any more, the output of the detector 10 goes down to L to close the contact of the driver 11. Consequently, a signal receiver 4 is connected to the printer 8, which is put in operation to perform monitoring.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for controlling a data printer.

FIG. 1 shows a configuration in which signals from the monitored P9i are remotely monitored by the management center.

In the figure, (1) is an operation monitoring device installed at the Kenri Center;
(2) is a transmission line that connects the operation and monitoring device [7 (1) and the operation and monitoring device M of the monitored station and sends and receives data signals; (3)
is a changeover switch connected to the transmission line (2), (4) is a signal receiver connected to the changeover switch (3), (5) is an operation device for inputting data, and (6) is an operation device (5). and 16
A controller (7) inputs signals from the control device (6) and displays them on a cathode ray tube (8). ) is a printer having a printing mechanism, and (9) is a signal transmitter.

That is, when a monitoring signal is sent from the monitored station through the transmission line (2), it is input from the changeover switch (3) to the control device fIt (6) via the signal receiver (4). Here, predetermined data processing is performed, and the result display (7
), and the printer (8) prints it on the designated paper.

The supervisor at the management center will now monitor the signal from the monitored station using both the display (7) and the output of the printer (8). Now, move the selector switch (3) downwards in the diagram and operate the controller (5) to control the device! (6), the data is processed here, and the signal transmitter (9)
A signal is transmitted from the station via the changeover switch (3) and sent to the monitored station via the transmission line (2).

Normally, as long as the display device (7) is normal, it is often possible to handle the situation without the printing device (8). However, the display (7
) The printing device (8) is also kept in operation at all times, taking into consideration the visibility of the airport. Therefore, a large amount of paper is consumed, which increases costs. Also, if you have a large amount of printed paper,
It is often difficult to store and search them.

This invention aims to improve the above-mentioned problems, and is a printing device control device that drives the printing device only when there is an abnormality in the control device that processes the program, thereby minimizing the consumption of paper, storing it, and saving the trouble of retrieving it. The purpose is to provide

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

In the figure, (IU is an abnormality detection device consisting of a retriggerable monostable element and detects an abnormality in the control device (6), and (11) is always open when an abnormality in the control device (6) is detected. This is a drive device having a relay contact which is closed to connect a signal receiver (4) and a printer (8).Other than the above, it is the same as that in FIG.

The microprocessor constituting the control device (6) issues an interrupt at regular time intervals to run a test program. Then, the test program generates one pulse,
After that, it is configured to return to the processing before the interrupt. By doing this, if the microprocessor is normal,
Pulses are generated at regular intervals, and if something goes wrong, the pulses are no longer generated. The duration time of the output Q of the monostable element constituting the abnormality detection device (1()) is set longer than the pulse time interval of the input T, so while the pulses of the input T maintain a constant time interval. , the output Q1 is continuously "
H'' (output η is [L''). This output. , is rHJ
During this period, the drive device 1ffi (11 contacts are open,
Printer (8) does not work. That is, the control device (6)
While it is normal, only the display (7) is used for monitoring.

Next, when the 11ilJ1 wholesaler (6) becomes abnormal and no pulse is generated, the output Q of the monostable element becomes "L".
(Output enabled is "H"), and the contact of the drive device ftjo is closed. Now, the signal receiver 1g device (4) is the printer (8)
The printing device (8) is connected to the printing device (8).
monitoring will be carried out.

FIG. 4 shows another embodiment of the invention.

In the figure, (12) is a power supply connected to the printer (8) through the contacts of the drive unit (11). Note that the signal receiver (4) is always connected to the printer (3). Other than the above, the configuration is the same as in FIGS. 2 and 3.

When the control device (6) is normal, the contact of the drive device (river) is open, so the power (121) is not supplied to the printing device (8), and the printing device (8) does not operate. ) becomes abnormal and the contact is closed, the power supply (1) is supplied to the printing device (8), the printing device (8) operates and prints the signal from the signal receiver (4).

FIG. 5 also shows another embodiment of the invention.

In the figure, (I3) is input to the control device (6) and the control device (
If 6) is normal, it is a specified input that generates a specified output (the content of the output result is known). The rest is the same as in FIG. 2.

In other words, if the specified output corresponding to the specified input (13) is generated, the control device (6) is normal, and if the specified output does not occur, it is detected as abnormal, and the printing device (8) is activated. do.

1. Install 2 m of control devices (6) with the same function, give signals from the signal receiver (4) to them at the same time, and compare whether the output results of the two sets of control devices (6) are the same. However, if they are the same, it may be detected as normal, and if they are different, it may be detected as abnormal.

FIG. 6 also shows another embodiment of the invention.

In the figure, (14) is a manual button that has a contact that mechanically maintains its state when closed, and ('') is a manual button (
14I and the abnormality detection device f (output Q of 11) are input, and the output is an OR gate connected to the drive device (1).Others are the same as in FIG.

When the manual switch (14) is not pressed, the operation is exactly the same as that shown in FIG. 3. When the manual switch (14) is pressed, the output of the ○Rgede05) becomes rHJ, and the contact of the drive device (river) is closed. In other words, it is possible to operate the printing device (8) at any time. Become.

As explained above, in this invention, as soon as an abnormality is detected in the control device that processes the received 1g signal, the printer is driven to print the input data, thereby reducing the consumption of printing paper. The effort of storing and retrieving them can be saved.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing a conventional printer control device, FIG. 2 is a block circuit diagram showing an embodiment of the printer control device according to the present invention, and FIG. 3 is a partial detailed diagram of FIG. 2. ,
4 and 5 are block circuit diagrams showing other embodiments of the present invention, corresponding to FIG. 2, and FIG. 6 is also a block circuit diagram showing another embodiment of the present invention, corresponding to FIG. 3. be. (6)...Program control device ff, (8)...
・Printing device, (IQ... Abnormality detection device, (River... Drive device) Identical or corresponding parts in the figures are indicated by the same reference numerals. Representative: Makoto Kuzuno - (1 other person) Figure 3 37. Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A printing device that prints input data, a control device that programs the received signal, an abnormality detection device that operates when this control device is abnormal, and a drive device that drives the printing device when this abnormality detection device is activated. A control device for the printing device.