JPH034981Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a magnetic tape device that displays errors on the operator panel. The display is roughly divided into failures that cause the main power supply to shut off, and failures that allow the main power supply to continue operating. The present invention relates to an error display circuit for a magnetic tape device that further distinguishes whether the failure was detected by the main power supply unit internal failure or the processor and displays the failure content in alphanumeric characters and/or alphanumeric characters.

(b) Prior Art and Problems With conventional magnetic tape devices, when some kind of abnormality occurs while the magnetic tape device is in operation, only an error message is displayed on the operator panel attached to the magnetic tape device. it's shown. However, the above-mentioned abnormal conditions include not only hardware failures but also operator errors, and there are failures that can be easily recovered by a reset. Therefore, if only the occurrence of an error is displayed, the details of the error occurrence will not be known and it will take time to recover from the error.
This has the disadvantage that it not only reduces the operating rate of the magnetic tape device but also reduces the efficiency of the computer system.

(c) Purpose of the invention In order to eliminate the above-mentioned drawbacks, the purpose of the invention is to provide an operator panel with a system that allows the microprocessor that detects the failure to continue operating, depending on the nature of the failure that has occurred in the magnetic tape device, without causing a power outage. In case of disability,
The system displays faults that require the microprocessor to stop operating or that involves a power cut, and furthermore encodes and transmits the details of the fault that the microprocessor can detect. The content of the fault that has occurred before it is detected is transmitted from the power supply section, converted to alphanumeric characters and/or numbers, and displayed, and a power supply installed separately from the main power supply is used to display the above-mentioned general display and alphanumeric characters. An object of the present invention is to provide an error display circuit for a magnetic tape device in which displayed contents are not erased even when the main power is cut off.

(d) Structure of the invention The structure of the invention is a magnetic tape device comprising a main power supply section that supplies current to the main parts of the magnetic tape device, and an alarm power supply section that supplies current to an error display circuit. Depending on the nature of the failure, the operator panel can be broadly classified into failures that involve power outage of the main power supply section;
Or, the main power supply section is provided with an indicator light that distinguishes and displays whether the fault is one that allows continued operation, and a display that can display the coded and transmitted details of the fault in alphanumeric characters and/or alphanumeric characters. The power-off indicator light continues to display as it receives current from the alarm power supply through the contacts of the relay that controls power on/off of the main power supply, indicating a failure that allows the main power supply to continue operating. The indicator light receives current from the alarm power source through the contacts of a relay that operates under the control of a fault detection processor, and continues to display. Based on the contents of a register that stores the coded and transmitted fault details from the processor, the fault details are further differentiated as to whether they are internal faults in the main power supply section or faults detected by the processor, and are displayed in alphanumeric characters and/or numbers. This is how it was done.

(e) Embodiment of the invention FIG. 1 shows an example of an operator panel for explaining an embodiment of the invention. Reference numeral 6 denotes a display unit which displays detailed contents of the error in alphanumeric characters and/or numbers. Reference numeral 5 indicates an alarm display that collectively displays failures that cause the microprocessor for failure detection to become inoperable. Reference numeral 14 is a unit check display that collectively displays the details of the failure that allows the microprocessor for failure detection to continue operating. The power required for these displays is +5V supplied from the power supply section of the magnetic tape device. Therefore, if a fault occurs in the power supply unit and the +5V current supply stops, the error display disappears and the cause becomes unknown, so the supply is made from a power supply separate from the power supply. It is desirable that the separate power supply be an uninterruptible power supply, but there is no particular regulation.

Here, we will explain the types of failures that make the microprocessor for failure detection inoperable and the types of failures that allow continued operation. First, the failures that make the microprocessor inoperable are as follows. Magnetic tape devices use various voltages: +5V, -6V, +24V, and -24V. +5V of this is used as a power supply for the logic circuit, and the reasons why the +5V current supply stops are: If a fault occurs in the +5V circuit and voltage fluctuations occur that make the logic circuit inoperable.If a fuse blows.Servo amplifier If an alarm occurs. When the logic circuit or motor reaches a current exceeding its rating or a temperature exceeding its rating. This is the case when a fan alarm occurs.

In this case, the power supply is automatically cut off in the power supply section, so the power to the fault detection microprocessor is also cut off, making it impossible to detect an abnormality and sending an alarm signal directly from the power supply section to the operator panel. In this case, the microprocessor for failure detection constantly monitors these abnormalities, and when an abnormality occurs, it sends an error code to the operator panel, and then sends a power-off signal to the power supply section to shut off the power. do.

Next, the failures that allow the microprocessor to continue operating are as follows. This may be due to an operator error, an error in the program that directs the microprocessor's operation, or a hardware failure other than those listed above.
All of them can be reset.

FIG. 2 is a block diagram of a circuit showing one embodiment of the present invention. From the input, commercial power passes through the no-fuse breaker NFB of the power supply section 1 and enters the alarm power supply section 4. The alarm power supply unit 4 generates +5V voltage for alarm display. Power on switch S
When 1 is turned on, relay RL1 operates and contact RL1
is closed and relay RL2 is activated. Contact rl2 of relay RL2 closes and commercial power is turned on to main power supply section 3.
Various voltages of +5V, -6V, +24V, and -24V are used in the magnetic tape device, and are generated by the main power supply section 3 provided in the power supply section 1. If the above-mentioned failure occurs here, the main power supply section 3 will cause the operator panel 2 to
In case of failure in NOT circuit 9 and AND circuit 13,
"0" is sent to the NOT circuit 10 and AND circuit 13 as an alarm signal instead of the "1" that had been sent up to that point. Therefore, the output of the AND circuit 13, which was previously "1", is inverted to "0". The register 7 is a shift register and is cleared when the output of the AND circuit 13 becomes "0", and all 8-bit outputs become zero. Furthermore, when the NOT circuit 9 is inverted and becomes "1", the output of the OR circuit 11 also becomes "1", and the 7-segment display section 6 displays "40" in this example, as shown in FIG. . or
When NOT circuit 10 becomes “1”, OR circuit 1
The output of No. 2 also becomes "1", and the display 6 displays "80" in this example. The main power supply unit 3 sends the above-mentioned alarm signal to the operator panel 2 upon occurrence of the above-mentioned fault, and then reverses the switch S3. Therefore, the relay RL2 is restored and the contact rl2 opens to stop the operation of the main power supply section 3. Since the switch S3 is reversed and the contact rl1 of the relay RL1 is closed, the relay RL3 is activated. The contact rl3 of the relay RL3 closes, and the alarm display 5 lights up due to the current supplied from the alarm power supply section 4.

If the above-mentioned failure occurs, the microprocessor sends an error code to terminal B as described above. A clock is sent to terminal A, and AND circuit 8 provides the clock to register 7 using +5V applied via alarm display 5. The register 7 stores the error code and sends it to the display 6 using the clock. The display section 6 decodes the error code and displays it in alphanumeric characters and/or numbers. In addition, the microprocessor issues an instruction to reverse the switch S3 of the power supply section 1 in response to the above-mentioned failure, so that the relay RL3 operates as described above, and the relay RL2 is restored. Therefore, the main power supply section 3 stops operating. When relay RL3 operates, contact RL3 closes, so alarm display 5 lights up, and the input of AND circuit 8 is grounded, thereby blocking the clock input from terminal A.
The operation of the register 7 is stopped and the display on the display section 6 is maintained.

In the case of a failure that allows the microprocessor to continue operating, the microprocessor issues an instruction to close the switch S2 of the power supply section 1, lights up the unit check display 14, and sends an error code to terminal B. Relay RL3 does not work, so AND
The circuit 8 continues to supply the clock input from terminal A to the register 7. Register 7 therefore stores the error code from the microprocessor and sends the error code to display 6. The display 6 decodes the error code and displays it in alphanumeric characters and/or numbers.

(f) Effect of the invention As explained above, the present invention displays the content of the failure that occurs in the magnetic tape device in alphanumeric characters and/or numbers, and indicates whether the failure will cause the main power supply to stop or whether the main power supply will continue to operate. In addition to separately displaying possible failures, it is necessary to take prompt measures to maintain the magnetic tape device by supplying current from a power source other than the main power supply to maintain the display. I can do it.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of an operator panel for explaining an embodiment of the present invention, and FIG. 2 is a block diagram of a circuit showing an embodiment of the present invention. 1 is a power supply section, 2 is an operator panel, 3 is a main power supply section, 4 is an alarm power supply section, 5 is an alarm display, 6 is a display section, 7 is a register, and 14 is a unit check display.

Claims (1)

[Scope of utility model registration request] A magnetic tape device comprising a main power supply unit that supplies current to the main parts of the magnetic tape device, and an alarm power supply unit that supplies current to an error display circuit,
An indicator light is provided on the operator panel to distinguish and display whether the fault is roughly classified according to the nature of the fault, and whether the fault is one that causes a power outage of the main power supply section or a fault that allows the main power supply section to continue operating, and the fault is transmitted in a coded manner. A display is provided that can display the contents in alphanumeric characters and/or numbers, and the indicator light indicating power off of the main power supply section is supplied with current from the alarm power supply section through the contact of a relay that controls power on/off of the main power supply section. The indicator light that indicates a fault that allows the main power supply to continue operating receives current from the alarm power supply through the contacts of a relay that operates under the control of a dedicated fault detection processor and continues to display. The display indicates that the fault is an internal fault in the main power supply based on the logic level that is inverted when the main power supply is turned off and the contents of a register that stores the coded and transmitted fault content from the processor. An error display circuit for a magnetic tape device, characterized in that a fault detected by the processor is further distinguished and displayed by alphanumeric characters and/or numbers.