JPS62229341A - Initialization system for microprocessor - Google Patents

Abstract

PURPOSE:To attain initialization of a microprocessor of a device to be monitored by discontinuing the output of the carrier signals of a modulator of a monitor device when the microprocessor of the device to be monitored is abnormal. CONSTITUTION:When a microprocessor 221 set at an information processing control part 22 of a device 2 to be monitored is abnormal, the abnormality detecting signal is sent to a microprocessor 121 of a monitor device 1 via a transmission line 3. The processor 121 receives the detecting signal and immediately cuts off the carrier output of a modulator 111 of a signal transmitting part 11. Thus a signal transmitting part 21 of the device 2 detects that the output of the carrier signal is discontinued and outputs the carrier stop detecting signal to the part 22 in order to reset initialization with the processor 221. Then the part 22 receives the detecting signal and initializes the processor 221.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an initialization method for initializing a microprocessor installed in a monitored device by a monitoring device of a remote monitoring and control system.

(Prior Art) A conventional initialization method for supplying power to a remote monitoring and control system in which a monitoring device and a monitored device are connected through a transmission line is as described below. That is, the monitoring device sends a specially coded code to the monitored device via the transmission path. The microprocessor in the information processing control unit of the monitored device analyzes the transmitted code, clears the buffer memory in the information processing control unit, and completes the initialization of the monitored device. Therefore, with the conventional initialization method, there is a problem that the buffer memory cannot be cleared if the microprocessor is not operating normally, and a microprocessor that has malfunctioned such as runaway cannot be initialized.
There was a problem in that it was not possible to restart the program.

(Problems to be Solved by the Invention) As mentioned above, in the conventional initialization method, it is not possible to clear the buffer 7 memory when the microprocessor of the monitored device is not operating normally; Unable to initialize and restart the program.

SUMMARY OF THE INVENTION Accordingly, the present invention aims to eliminate the above-mentioned drawbacks and provides a method for initializing a microprocessor in which the microprocessor of a monitored device can be initialized by a monitoring device.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides an abnormal operation detection means for detecting an abnormal operation of a microprocessor of a monitored device, and a monitoring device that modulates data upon receiving notification of the abnormal operation. It is composed of carrier signal cutoff means for cutting off the carrier signal output of the modulator of the device, and initialization means for initializing the microprocessor of the monitored device using a carrier stop detection signal of the carrier signal.

(Function) In the microprocessor initialization method of the present invention, when the abnormal operation detection means detects an abnormality in the microprocessor of the monitored device based on the presence or absence of a timing signal that is no longer output due to an abnormality in the microprocessor, this abnormality detection signal is transmitted to the transmission line. to the monitoring device's microprocessor. This activates the carrier signal blocking means and blocks the carrier signal output from the modulator of the monitoring device. When the monitored device detects the stop of this carrier signal, the microprocessor of the monitored device is initialized by this carrier stop detection signal. Therefore, the microprocessor of the monitored device returns to a normal operating state, and the buffer memory is cleared by this microprocessor.

(Example) An example of the present invention will be described below with reference to the drawings. 1 is a monitoring device, 2 is a monitored device, and 3 is a transmission path for transmitting data between the monitoring device 1 and the monitored device 2. 11.21
is a signal transmission unit that modulates transmission data and demodulates reception data, and each signal transmission unit includes a modulator 111 and 211.
, demodulators 112 and 212 are provided. 12.2
Reference numeral 2 denotes an information processing control unit that controls transmission and reception operations and processes transmission and reception data using a microprocessor 121, 221, a buffer memory 122, 222, and the like. 13.23
is an input/output section for sending and receiving data.

Next, the operation of this embodiment will be explained. The modulator 111 of the monitoring device 1 and the demodulator 212 of the monitored device 2 and the modulator 211 of the monitored device 2 and the demodulator 112 of the monitoring device 1 each form one opposing communication path via the transmission path 3. ing. In the monitoring device 1, when the information processing control section 12 sends data (for example, control data, etc.) input through the data input/output section 13 to the signal transmission section 11, the signal transmission section 11 transmits the input data to the modulator 111. The signal is modulated by and transmitted to the signal transmission unit 21 of the monitored device 2 via the transmission path 3. The signal transmission unit 21 demodulates the received modulated data using a demodulator 212,
The demodulated data is sent to the information processing control section 22. The microprocessor 221 of the information processing control unit 22 stores the sent data in the -H buffer 1 memory 222, etc., performs various processing, and also sends the received data and processing results to the data input/output unit at a certain timing. 23 to a processing section (not shown) of the monitoring device.

Further, in the monitored device 2, when data inputted from the data input/output section 23 and data generated by the information processing control section 22 are inputted to the signal transmission section 21, the signal transmission section 2
1 modulates these data with a modulator 211, and sends this modulated data to the signal transmission section 11 of the monitoring device 1 via the transmission path 3.
Send to. The signal transmission section 11 demodulates the received modulated data using a demodulator 112, and passes this demodulated data to the microprocessor 121 of the information processing control section 12. The microprocessor 121 stores the passed data in the buffer 7 memory 12.
2, etc., various monitoring processes and the like are performed, and the received data and processing results are supplied to other parts of the monitoring device 1 (not shown) via the data input/output section 13 at a predetermined timing. Note that the modulator 111 of the "monitoring device" always sends a carrier signal to the signal transmission section 21 of the monitored device 2 via the transmission path 3.

Here, the 17!7 report of the monitoring device 2 is 9! When the microprocessor 221 of the U-control control unit 22 goes out of control and enters an abnormal state, the abnormality of the microprocessor 221 is detected by firmware (not shown) installed in the information processing control unit 22, and the microprocessor 221 is activated. An abnormality detection signal is sent to the signal transmission section 21. The signal transmission unit 21 modulates the abnormality detection signal from the microprocessor 221 using the modulator 211 and then transmits the signal to the signal transmission unit 11 of the monitoring device 1 via the transmission path 3 . signal transmission fIA
11 demodulates the received abnormality detection signal from the microprocessor 221 using the demodulator 112, and then passes it to the microprocessor v121 of the information processing control section 12. Upon receiving the abnormality detection signal, the microprocessor 121 immediately cuts off the carrier output of the modulator 111 of the signal transmission section 11. As a result, the signal transmission section 21 of the monitored device 2
detects that the output of the carrier signal sent from the modulator 111 has stopped, and the microprocessor 221
A carrier stop detection signal is output to the information processing control section 22 to initialize the carrier. The information processing control unit 22 initializes the microprocessor 221 upon receiving this carrier stop detection signal. microprocessor 2
21 is a buffer memory 22 in the process of being initialized.
Clear step 2. Here, the microprocessor 22
Abnormalities such as runaway of the microprocessor 221 are detected by detecting the presence or absence of a timing signal which is stopped when an abnormality occurs in the microprocessor 221. Further, as the carrier stop detection means for the carrier signal from the modulator 111 in the signal transmission section 21, the one conventionally provided in this type of signal transmission section 21 is used.

In addition, in the above system, when it is desired to clear only the buffer 1 memory 222 of the monitored device R2, the microprocessor 121 of the monitoring device 1 clears the specially coded code as in the case of the monitored device R2. ! 1 device 2, the microprocessor 221 of the monitored device 2 that received it clears the buffer 7 memory 222.

According to this embodiment, even when the microprocessor 221 of the monitored device 2 becomes abnormal, the modulator 1 of the monitoring device 1
By stopping the output of the carrier signal 11, the microprocessor 221 can be initialized, and at the same time, the buffer 7 memory 222 can be cleared. In the above embodiment, an example was described in which, when the microprocessor 121 of the monitoring device 1 learns of an abnormality in the microprocessor 221 of the monitored device 2, it automatically stops outputting the carrier signal of the modulator 111. , Is the microprocessor 121 a microprocessor? When 21 abnormalities are detected, this is monitored! The output of the carrier signal from the modulator 111 may be manually stopped by displaying the signal on a display (not shown) or the like.

E. Effects of the Invention] As described above, according to the microprocessor initialization method of the present invention, when the microprocessor of the monitored device is in an abnormal operating state, the output of the carrier signal of the modulator of the monitoring device 1 is stopped. This has the effect of initializing the microprocessor of the monitored device.

[Brief explanation of drawings]

The drawing is a block diagram showing an embodiment of a system to which the microprocessor initialization method of the present invention is applied. 1...Monitoring device 2...Monitored device 3
...Transmission path 11.21...Signal transmission section 12.22...Information processing control section 111, 211.
...Modulator 121.221...Microprocessor 1
22.222...Buffer memory agent Patent attorney Nori Chika Ken Shu Kanshu Sanno -

Claims (1)

[Claims] In a system in which a monitoring device monitors a monitored device connected to a transmission path, the monitoring device includes an abnormal operation detection means for detecting an abnormal operation of a microprocessor that controls the monitored device; An initialization system for a microprocessor, comprising carrier signal cutoff means for cutting off the output of a carrier signal of a modulator, and initialization means for initializing a microprocessor of a monitored device using a carrier stop detection signal of the carrier signal.