JPS5912642Y2 - data processing equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a data processing device that transfers data between a human output device and a processor, processes the data with the processor, and supplies the results to the input/output device, and particularly relates to The present invention relates to a device for dealing with power supply abnormalities.

For example, in process control, a digital control method is used that uses a processor to input the signal from the detection end into an electronic computer and process the data, that is, perform proportional-integral calculations and give the result to the process as a control signal. There is.

In the case of a power outage in such an apparatus, for example, when the power goes out, process control has conventionally continued as soon as one day after the power outage is restored.

However, depending on the control target, for example, when performing temperature control that gradually increases the temperature over time and then raises it relatively suddenly, as shown in Figure 1, within the region where the temperature increases relatively suddenly. Assume that a power outage occurs at time t1 when the temperature reaches T1, and as the power outage causes the control to stop, the temperature drops and by time t2 when the power outage is restored, the temperature has dropped to T2, which should have risen relatively gradually. .

The control from this restoration time point t2 is carried out as a curve 12 having the same characteristics as the control characteristic at temperature T1, or as a curve 13 along the current curve 11 at temperature T2, or as a curve 12 that is similar to the control characteristic at temperature T1. ．． Various types of control can be considered, such as a case where the characteristic approaches the curve 11 by other characteristics instead of 13, a case where the control is further stopped, etc.

In the past, such matters were ignored and operation continued after restoration.

However, if the power outage is relatively long, control that does not take into account the state change during the power outage becomes a problem, and it is desirable to have control characteristics that are desirable depending on the duration of the power outage.

From this point of view, this invention stops the control when there is an abnormality in the power supply to the processor, counts the time during the abnormality, and determines when the abnormality occurred according to the abnormality time when the abnormality has disappeared. It is designed to perform control with different control characteristics.

For example, as shown in FIG. 2, an input/output device 16 is provided which receives necessary data from the control process object 15 and supplies control signals.
The processor 17 performs necessary processing, such as proportional-integral calculations, and supplies the resultant signal to the input/output device as a control signal, thereby controlling the control process object 15.

In this invention, a power supply 18 for the processor 17;
For example, an abnormality in the commercial power source is detected by the power abnormality detector 19, and when the abnormality is detected, the clock circuit 21 is driven to time the period of the abnormality.

Of course, this clock circuit 21 is operated by a battery other than the power supply 18, for example.

For example, the power supply abnormality detector 19 has a rectifier circuit 23 connected to the secondary side of a power transformer 22 connected to the power supply 18 to be monitored, as shown in FIG. supplied to

The voltage across this capacitor 24 is determined by the reference voltage generation circuit 2.
A reference voltage obtained from, for example, a Zener diode 26 of this reference voltage generating circuit 25 is supplied to an inverting input terminal of a comparator 27.

On the other hand, RC phase shifters 28 and 29 are provided between the middle point and one end of the secondary side of the power transformer 22, respectively, and the outputs of these phase shifters are shifted in phase by 90 degrees from each other. Similarly, a phase shifter 31. 32 are provided, these phase shifters 31 . 32
The outputs of are shifted by 90° from each other.

Therefore, four-phase outputs whose phases are sequentially shifted by 90 degrees are obtained from the phase shifters 28, 29, 31, and 32, and these are rectified by a rectifier circuit 33 and supplied to a smoothing circuit 34.

This smoothed output is supplied to the non-inverting input terminal of comparator 27 and compared with the reference voltage at its inverting input terminal.

The smoothing circuit 34 is assumed to have a relatively small time constant.

In this way, the phase shifter is used to create a multiphase alternating current, and since this is rectified, even if the time constant of the smoothing circuit 34 is made small, the ripple component becomes small.

Therefore, if this smoothed output drops even slightly with respect to the reference voltage of the reference voltage generating circuit 25, it can be ensured that this is detected without malfunction.

Normally, the reference voltage is small and therefore the output of the comparator 27 is at a high level, but when a power outage occurs, the smoothed output quickly becomes lower than the reference voltage and the output of the comparator 27 becomes a low level.

Since positive feedback is applied to the comparator 27 by the resistor 35, the inversion is performed rapidly, and the low level of the output drives the transistor 36, and the output terminal 37 indicates that there is a power outage, that is, there is an abnormality in the power supply. Detected.

When a power supply abnormality is detected in this way, in the clock circuit 21, for example, as shown in FIG. 4, the monostable multivibrator 38 is driven by the detection abnormality signal from the terminal 37, and the counter 39 is reset by its output. Terminal 37. The abnormality detection output of Mari is given to the gate 41,
This is opened and the clock signal from the oscillator 42 is counted by the counter 39 through the gate 41.

These monostable multivibrator 38, counter 39,
The oscillator 42 is operated by a battery 43 different from the power supply 18, and is always operated regardless of any abnormality in the power supply 18.

In the structure shown in FIG. 2, when an abnormality is detected by the power supply abnormality detector 19, an interrupt signal is given to the processor 17 through the interrupt line, and various data at that time are stored in the memory without being lost in the event of a power outage. At the same time as processing such as saving data to a storage device is performed, the clock circuit 21 measures time.

When the power supply abnormality is restored, the processor 17 is notified of this through an interrupt signal line, and at the same time data indicating the period of the abnormality is sent to the processor 17 from the clock circuit 21.
given to.

By the interrupt operation at this time, the processor 17 first judges the clock data from the clock circuit 21, and based on this, it is determined what kind of process control to perform.

For this control, it is known in advance what kind of control characteristics should be used depending on the power supply abnormality time and abnormality occurrence time depending on the control target, and programs for these are stored and can be used. It is sufficient to create a control program at the time of recovery so as to read and control the abnormality time and period.

As described above, according to the data processing apparatus according to the present invention, when the power supply becomes abnormal, the most preferable control is performed at the time of recovery from the abnormality in accordance with the abnormality time.

Therefore, this idea is extremely effective for control when processes change depending on the duration of a power outage.In particular, relatively short power outages occasionally occur, and even during such short periods, processes may change. The abnormality detector shown in FIG. 3 is preferable in order to be effective when a change occurs, and to quickly detect such a short-term abnormality.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of a temperature control program, Fig. 2 is a block diagram showing an example of an instantaneous processing device according to this invention, Fig. 3 is a connection diagram showing an example of a power abnormality detector, and Fig. 4 is a diagram showing an example of a power supply abnormality detector. The figure is a block diagram showing an example of a clock circuit. 15...Controlled object, 16...Music input/output device, 1
7... Song processor, 18... Song commercial power supply, 19... Power supply abnormality detector, 21... Clock circuit.

Claims (1)

[Scope of utility model registration request] In an instantaneous processing device for control, the measured value from the controlled object is taken into a processor, the data is processed by this processor, and the aforementioned controlled object is controlled in accordance with the result of the instantaneous processing. When an abnormality occurs in the power supply to the processor, the processing device has a control procedure that is selected and executed in response to at least one of the time when the power supply abnormality occurs and the duration of the power abnormality, which is different from the control procedure executed when the power supply is normal. At least one abnormality control procedure is retained and stored, and a power abnormality detector for detecting an abnormality in the power supply to the processor is connected to the power supply, and the power supply operated by the output of the power abnormality detector is in an abnormal state. A clock circuit that supplies at least one of the duration time and the time of occurrence of the abnormal state of the power source as time measurement data is connected to the power abnormality detector, and the time is supplied by the clock circuit after the abnormal state of the power source ends. Data is input to the processor by the data input means, and based on the input clock data, the abnormality control procedure corresponding to the corresponding power abnormality state is selected and executed by the selection execution means. An overnight processing device characterized by: