JPH03187091A - Magnetic recording and reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a magnetic recording/reproducing device (hereinafter abbreviated as VTR).

BACKGROUND OF THE INVENTION In recent years, VTRs have been used in a wide range of applications, from home use to industrial use. Among these industrial VTRs, there is a dubbing VTR for making soft tapes as a special purpose. This special VTR not only monitors the operating status of the VTR and displays it on the spot, but also allows for unmanned operation and automation. There is an increasing desire to be able to resume abnormal indications (for example, the tape has run out, the motor has stopped, the input signal has been interrupted, etc.). However, in conventional VTRs, when the power is turned on, not only the control circuit but also the display is initialized to a clear state.

Problems to be Solved by the Invention However, in a conventional VTR that has been initialized as described above, it is not possible to display the state immediately before the power is turned off.
The problem was that it was not possible to check and exclude recorded tapes.

The present invention improves these points and provides a VTR that, when the power is turned off and then turned on again, continues the display that was displayed immediately before the power was turned off.

Means for Solving the Problems The present invention provides a magnetic recording/reproducing device that includes a power failure detection circuit;
Equipped with a circuit that monitors and displays whether or not the VTR is operating normally, a memory that stores signals from the monitoring circuit, and a battery that backs up the memory, allowing you to monitor the VTR's status when a power outage or power off is detected. The system stores the information and continues to hold the memory as it is with a battery, and when the power is restored next time, the stored contents are read out and the display automatically returns to the one before the power outage even after the power is restored.

Effect of the present invention With the above configuration, when the power is turned off and then turned on again, the display returns to the display immediately before the power was turned off.

Embodiment FIG. 1 is a block diagram showing an embodiment of a control device for a magnetic recording/reproducing apparatus according to the present invention. The configuration and operation of the apparatus of the present invention will be explained below based on the drawings.

The microcomputer 2 takes in data input from the operation switch 1 and controls the VTR mechanism 3.

In the operation memory circuit 4 which is the core of the present invention, the monitoring circuit constantly monitors the operation of the microcomputer 2, and if an abnormality occurs, it lights up the abnormality indicator lamp on the display section 3 and at the same time outputs the VTR abnormality signal 8. do. The monitoring circuit 12 also has a function of lighting up an abnormality indicator lamp on the display section 3 based on the stored data 9. The power failure detection circuit 5 detects that the power is turned off and outputs a latch signal 10 to the memory circuit 6. A VTR abnormality signal 8 is applied to a D terminal of a memory circuit 6 composed of a D flip-flop, and can be stored at the rising timing of a latch signal 10. In other words, the state immediately before the power is turned off is stored. The backup power supply 7 is a power supply for keeping the memory circuit 6 operating at all times. This power source is not necessarily a battery, but may be a large capacity capacitor. Next, when the power is turned on, the microcomputer 2 performs initial processing to set the VTR mechanism 3 to 5TOP. Since the monitoring circuit monitors not only the state of the microcomputer 2 but also the stored data 9, the stored contents of the memory circuit 6 are checked, and if the stored data shows an abnormality, Turn on the abnormality indicator lamp on the display section 3. The reset switch 11 is used by the operator to confirm an abnormality display and erase the display.

By doing this, in a dubbing system in which multiple VTRs are lined up and operated automatically, for example, dubbing can be performed unattended late at night, and then the power can be turned off using a timer.
However, when you turn on the power the next morning, you will be able to confirm whether the automatic operation was normal or abnormal.

Although the above description has been made using the example of a VTR, the present invention can also be applied to audio tape recorders, digital audio recorders, etc. for the same purpose. Also, in the above example, when the microcomputer is turned on, the microcomputer is set to the 5TOP state through initial processing, but this can be returned to the state before the power was turned off using a backup power source. .

Effects of the InventionAs is clear from the above description of the embodiments, according to the present invention, when the power is restored, the abnormal display before the power outage or power OFF is stored, so dubbing during automatic operation is not possible. Its practical effects are extremely large, such as being able to confirm whether dubbing has been done correctly and, for example, easily selecting defective recording tapes that have been dubbed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a VTR control device according to an embodiment of the present invention. 2...Microcomputer, 3...
Display section, 4... Operation memory circuit, 5...
Power failure detection circuit, 6...Memory circuit, 7...
... Backup power supply, 8 ... VTR abnormal signal, 9 ... Memory data, 10 ... Latch signal, 12 ... Monitoring circuit.

Claims (1)

[Claims] Equipped with a power outage detection circuit, a circuit that monitors and displays whether the device is operating normally, a memory that stores signals from the monitoring circuit, and a power source that backs up the memory to detect power outages. When the power is restored, the monitoring status of this device is memorized, the memory is maintained by the backup power supply, and the next time the power is restored, the memorized contents are read out, and even after the power is restored, the display automatically returns to the one before the power outage. A magnetic recording and reproducing device.