JPS61109156A - Automatic restart control system - Google Patents

Abstract

PURPOSE:To improve the reliability of the titled system by presetting a presettable counter in a fixed cycle by the software and giving a decision on an operating fault when the count value of said counter exceeds the set value. CONSTITUTION:An automatic restart control system comprises an accessable preset command register 1 using a program, presettable counter circuits 20-2n, a setting switch, comparators 30-3n which compare the value of said switch with the output values of circuits 20-2n respectively, a detecting circuit 4 which decides the outputs of comparators 30-3n and a restart circuit which works on the output of the circuit 4. The circuit 5 is actuated automatically when the coincidence is obtained between the output values of circuits 20-2n and the set value of the setting switch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for automatically restarting an electronic computer or a program-controlled control device from an abnormal stop due to a hang-up or the like.

Electronic computer or program controlled control device.

A so-called hang amplifier may occur due to a hardware failure or a software defect.

In an electronic computer or a program-controlled control device used as a host computer of an online system, it is necessary to promptly detect such a hang-up state and take necessary measures.

[Prior Art] Therefore, in general, a monitoring program is provided, and the processing status is monitored using this program.

Also, relatively large electronic computers or program-controlled control devices are equipped with a service processor for monitoring.

[Problems to be Solved by the Invention] As explained above, in conventional electronic computers or program-controlled control devices, the processing status is monitored by a monitoring program, but the problem is that the monitoring program itself hangs up. cannot be dealt with.

Relatively large computers are equipped with a separate processor such as a service processor, which monitors the processing status and takes measures to deal with it, but in relatively small-scale systems, the cost However, such a thing is difficult.

In such a relatively small system, hang-ups are caused by the software itself.

It is an object of the present invention to detect dynamic loops or completion anomalies and automatically restart them.

[Means for solving the problem] The above problem requires a program-accessible preset command register, a presettable counter, a setting switch, the value of the output of the counter, and the value of the setting switch. It is equipped with a comparator for comparison, a detection circuit for determining the output of the comparator, and a restart circuit activated by the output of the detection circuit. This problem is solved by the automatic restart control method of the present invention configured to automatically operate the restart fi1m.

[Function] In other words, a counter that can be preset by software is preset at a constant cycle, and when the counted value exceeds a preset value, it is determined that the operation is abnormal and the restart circuit is activated. It is. The set value is an operation monitoring time defined for each program, and is used to monitor a preset cycle by the program.

[Example] The gist of the present invention will be specifically explained below with reference to an example shown in FIG.

FIG. 1 is a circuit configuration block diagram of an embodiment of the present invention. In the figure, 1 is a preset command register, 2o I '-' + 211 is a counting circuit, 30° ---
+3 n is a comparator, 4 is a detection circuit, 5 is a restart circuit,
6 is a status register, 7 is a latch circuit, 8o +
'---'+8fi each indicates a program.

Programs 8o+-.+8n are n individual programs or check points in the program.

Preset command register 1 is for each program 8.
Each o+'-'fa11 has a register that can be preset at any time according to instructions from the program. The preset value of this register is normally set to "01".

When the program runs and reaches a check point, for example 8o, the value #0 of the corresponding preset command register 1 is preset to the corresponding counting circuit 2o.

Each counting circuit 2o1, -, +2n counts by +1 at a constant period when a start signal is issued.

The counting operation of this counting circuit 2o + -...-+2o is as follows:
It shall be possible to stop only by operating the stop switch or reset switch. In other words, once started, it will not stop unless human intervention is performed.

The output of the counting circuit 2o + '-' + 20 is sent to the comparator 3o
+−・−H3o. Comparator 3o + '-'
The value of the counting circuit 2o+'-'4(l) transmitted to the counter circuit 2o+3n is constantly compared with the set value that has been set.

This set value is a monitoring time appropriately determined for each program, and the preset cycle is monitored using this monitoring time.

If the values of the counting circuits 2o, -・-+2n match the respective set values, the comparator 3o +
'--.+3n generates a coincidence signal and transmits it to the detection circuit 4.

In the detection circuit 4 which monitors the coincidence signal of each comparator 3o + -,-+3n, the comparator 3o+'-'13
When the occurrence of a match signal from fl is detected, the status is displayed in the status register 6, and a start trigger signal is sent out to activate the restart circuit 5.

In the restart circuit 5, a restart timing circuit is activated by the activation trigger signal from the detection circuit 4, a system reset signal and a computer (control device) start signal are generated, and the restart mode state is recorded in the status register. 6
Display to.

Of course, the status register 6 is excluded from being reset by the system reset signal.

The operator can, by displaying the status register,
You can know when you are in restart mode and know which program caused the hang condition.

[Effects of the Invention] As explained above, according to the present invention, it is possible to detect and restart a hang-up, dynamics, re-loop, or completion abnormality (excessive time, etc.) of an operation caused by the software itself, and to restart the software itself. Since it is possible to know the program that caused the update, etc., it can be applied to relatively small-scale systems and is highly effective in improving system reliability.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration block diagram of an embodiment of the present invention. In the drawing, 1 is the preset command register, 2o +-・-
12n is a counting circuit, 3o +-・+3n is a comparator, 4 is a detection circuit, 5 is a restart circuit, 6 is a status register, 7 is a latch circuit, 8°, ・
-98n indicates the program, respectively.

Claims (1)

[Claims] a programmably accessible preset command register; a presettable counter; a configuration switch; a comparator for comparing the value of the output of said counter with the value of the configuration switch; and a detector for determining the output of said comparator. circuit, and a restart circuit activated by the output of the detection circuit, and configured to automatically activate restart control when the output value of the counter and the setting value of the setting switch match. An automatic restart control method characterized by: