JPH0317717A - Data processing system - Google Patents

Abstract

PURPOSE:To prevent the confusion due to the malfunctions of a timepiece immune from power failure by sending a starting instruction to a CPU in response to the result of comparison between the time information shown by the timepiece immune from power failure and the time information shown by a time mechanism when the CPU is started. CONSTITUTION:When a CPU 1 is started at a reserved time point, a microprogram execution control part 51 of an automatic operation controller 5 detects that the value of a time mechanism 54 is equal to the reserved time point. Thus an ARC control part 3 reads out the value of a timepiece 32 immune from power failure and sends it to the controller 5. The controller 5 compares the value of the timepiece 32 with the value of the mechanism 54. When the difference of both values is less than an allowable error set previously to a local memory 53, the controller 5 turns on the power unit of the CPU 1 to start a data processing system via the part 3. When said difference is larger than the allowable error, the abnormality of the timepiece 32 or the mechanism 54 is decided. Then the abnormality is displayed via a display mechanism 55 under the control of an instruction execution control part 2. At the same time, an instruction of application of the power unit is suppressed to the CPU 1. Thus it is possible to prevent the confusion due to the malfunctions of the timepiece 32.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a data processing system, and more particularly to a time control check method in a data processing system that performs automatic driving control.

Conventional technology Conventionally, in data processing systems, automatic operation! l
An automatic initialization function was supported as a function of all.

This function performs system start-up control without operator intervention when the data processing system is powered on, and does not require any manual operation of the system calendar. It automatically read the clock value and used the read value as the system calendar in subsequent operations.

Such conventional automatic initialization functions assume that the uninterruptible clock built into the data processing system will not malfunction, so if the uninterruptible clock malfunctions, an incorrect time will be displayed on the system calendar at system startup. This has the disadvantage that, for example, the date of the output form may be incorrect, causing great confusion to the user's work.

In particular, in recent automatic driving control, the power on/off control of data processing systems is often performed by automatic driving control devices connected to the data processing systems, so it is difficult to notice the malfunction of the uninterruptible clock as described above. In some cases, there may be a delay.

Purpose of the Invention The present invention has been made to eliminate the above-mentioned drawbacks of the conventional system, and provides a data processing system that can prevent major disruption to user operations due to malfunction of an uninterruptible clock. For the purpose of providing.

Composition of the Invention A data processing system according to the present invention includes a central processing unit having an uninterruptible clock and an automatic operation control device having a clock mechanism, wherein the data processing system includes a central processing unit having an uninterruptible clock and an automatic operation control device having a clock mechanism. Comparing means for comparing time information indicated by a power outage clock and time information indicated by the clock mechanism, and means for sending a start-up instruction to the central processing unit according to the comparison result of the comparing means. It is characterized by

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, the central processing unit 1 and the automatic operation control unit 5
What is automatic driving control device communication interface (hereinafter referred to as ARC)?
They are connected to each other via a communication interface (100).

In the central processing unit 1, an instruction execution control unit 2 for software instructions is connected to an automatic driving control unit control unit (hereinafter referred to as ARC control unit) 3 via an internal bus 200, and the system is started up by software. When setting the time of ε, the execution control unit 2 sends A via the internal bus 200.
A command is output to the RC control section 3.

The ARCitn 111 section 3° is composed of a microprogram execution control section 31, an uninterruptible clock 32, an automatic operation control device interface control section (hereinafter referred to as ARC interface control section) 33, and a battery 34.

The microprogram execution control unit 31 is the instruction execution control unit 2
It interprets the command from the ARC communication interface l00, reports the value of the uninterruptible clock 32 to the command execution control unit 2
interprets commands from the automatic operation control device 5 through the automatic operation control device 5, reports the value of the uninterruptible clock 32 to the automatic operation control device 5, and issues operation instructions to the power supply control unit 4 based on operation control commands from the automatic operation control device 5. A code 201 is issued.

The automatic operation control device 5 includes a CPU interface control section 52
It is connected to the central processing unit 1 via an ARC communication interface 100, and commands from the central processing unit 1 input via the ARC communication interface 10 (l) are executed by the microprogram execution control unit 51.

The automatic operation control device 5 includes a clock mechanism 54 and a display device tJI5.
5 are provided, and these clock III 54 and display mechanism 55 are connected to a microprogram execution control section 51.
controlled by

Further, the local memory 53 of the automatic operation control device 5 is used as a storage area for storing automatic operation start/stop times instructed by the central processing unit 1, and is also used as a work area for executing microprograms.

Next, the operation of one embodiment of the present invention will be explained using FIG.

When the automatic operation control software is executed by the command execution control unit 2 of the central processing unit 1, the command execution control unit 2 instructs the automatic operation control unit 5 through the ARC control unit 3 to schedule the start/end time of system operation. do.

When the automatic operation control device 5 receives the reserved time from the central processing unit 1, it sets the nuclear reserved time in a reserved time array table (not shown) in the local memory 53 under the control of the microprogram execution control unit 51.

Since the automatic operation control device 5 is always energized, the microprogram execution control unit 51 compares the value of the clock mechanism 54 with the reserved time set in the local memory 53, and if the values match, the central processing An instruction to start/stop the device W1 is output to ARc$11113 via the ARC communication interface 100.

When starting the central processing unit 1 at a scheduled time, when the microprogram execution control unit 51 detects that the value of the clock mechanism 54 has reached the scheduled time, it sends the value of the uninterruptible clock 32 to the ARC control unit 3. Instruct to read.

Since the ARC control unit 3 is operated by the power from the battery 34 even when the power is not turned on by the power supply control unit 4, the microprogram execution control unit 31 responds to instructions from the automatic operation control device 5. Uninterruptible clock 32
Read the value of the ARC communication interface l.
00 to the dynamic operation control device 5.

In the automatic operation control device 5, the microprogram execution control section 51 compares the value of the uninterruptible clock 32 sent from the ARC control section 3 with the value of the clock mechanism 54.

When the microprogram execution control unit 51 detects that the difference between the value of the uninterruptible clock 32 and the value of the clock mechanism 54 is within the tolerance value preset in the local memory 53, Microprogram execution control unit 5
1 sends a command to the ARC control unit 3 to turn on the power of the central processing unit 1.

The microprogram execution control unit 31 of the ARC control unit 3 interprets the power-on instruction command from the automatic operation control device 5,
An operation instruction code 20l is issued to the power supply control unit 4 to issue a power-on instruction.

When the power supply control section 4 turns on the power to the central processing unit 1 in accordance with the power-on instruction from the ARC control section 3, the command execution control section 2 executes system startup processing software to start up the system. At this time, the value of the uninterruptible clock 32 is read under the control of the instruction execution control unit 2,
That value is used as the system calendar.

However, by comparison in the microprogram execution control unit 51, it is detected that the difference between the value of the uninterruptible clock 32 and the value of the clock mechanism 54 is greater than or equal to the tolerance value preset in the local memory 53. Then, it is determined that an abnormality has occurred in the uninterruptible clock 32 or the clock mechanism 54, and an abnormality is displayed on the display mechanism 55, and the central processing unit 1
The power-on instruction to is suppressed.

Note that various parameters related to system start-up control can be set in the local memory 53 in the automatic operation control device 5, so that system start-up control can be performed in accordance with the operation of each user system. More effective system operation control can be performed in accordance with the operation of each user system.

In this way, the uninterruptible clock 3 built into the central processing unit 1
2 and the clock mechanism 5 built into the automatic operation control device 5.
4 is within the tolerance value preset in the local memory 53, the system startup instruction is given to the central processing unit 1, and when the difference is greater than the tolerance value, the system startup instruction is given to the central processing unit 1. By inhibiting the raising instruction, it is possible to prevent an incorrect time from being set on the system calendar due to a malfunction of the uninterruptible clock 32 in the central processing unit 1.

Therefore, it is possible to prevent serious confusion for the system due to incorrect time being set in the system calendar, and it is possible to prevent great confusion from being caused to user operations.

Effects of the Invention As explained above, according to the present invention, when starting up a system, the time information indicated by the uninterruptible clock of the central processing unit and the time information indicated by the clock mechanism of the automatic operation control device are compared, and the time information indicated by the clock mechanism of the automatic operation control device is compared. By sending a start-up instruction to the central processing unit in accordance with the comparison result, it is possible to prevent a great deal of disruption to user operations due to malfunction of the uninterruptible clock.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the structure of an embodiment of the present invention. Explanation of symbols of main parts 1...Central processing unit 2...Instruction execution control unit 3...Automatic driving control device control unit 4...
Power supply control unit 5... Automatic operation control device 32... Uninterruptible clock 34... Battery 51... Micro program execution control unit 53.
... Local memory 54 ... Clock mechanism 55 ... Display mechanism

Claims (1)

[Claims] (1) A data processing system including a central processing unit having an uninterruptible clock and an automatic operation control device having a clock mechanism, the data processing system including time information indicated by the uninterruptible clock when the central processing unit is started up; A data processing system comprising: a comparison means for comparing time information indicated by the clock mechanism; and a means for sending a start-up instruction to the central processing unit according to a comparison result of the comparison means.