JPS63224498A - Remote control system - Google Patents

Abstract

PURPOSE:To handle abnormality speedily when it occurs and to prevent hardware from being destroyed by providing an initialization data sending part which instructs the initialization of a processing system in a stop state to a monitoring device and also providing a device to be monitored with an initialization signal output part which supplies an initialization signal to the processing system. CONSTITUTION:The monitoring device 10 is provided with the initialization data sending part 13. The initialization data sending part 13 sends out the initialization data to a modulation part 12 when a switch 12 is operated. The device 20 to be monitored, on the other hand, is provided with the initialization signal sending part 27 and a demodulation part 21 receives a carrier detection signal CD to detect whether or not the initialization data is sent from the initialization data sending part 13 of the monitoring device 10. Then when the transmission of the initialization data is detected, the initialization signal is supplied to a CPU 24 without passing through the bus 23 of the processing system 28, etc. Thus, the switch 14 of the monitoring device 10 is operated to initialize the processing system of the device 20 to be monitored, so the abnormal stop of the processing system 28 is handled speedily after the abnormal stop is know on the side of the monitoring device 10.

Description

[Detailed Description of the Invention] [Object of the Invention (Industrial Application Field) This invention relates to a remote control system, and more specifically,
This relates to initialization when the processing system included in the monitored device is stopped.

(Prior Art) A conventional remote control system was configured as shown in FIG. 3 or FIG. 4. The monitoring device 10A and the monitored device 20B are connected through a line 30. The monitoring device 10A is provided with a data transmitting section 11, and the data sent from the data transmitting section 11 is modulated by the modulating section 12 and transmitted via the line 30 to the demodulating section 21 of the monitored device 2OA. The data demodulated by the demodulator 21 is S/P
It is sent to the (serial/parallel) converter 22, where it is converted into parallel data, and sent to the CPLJ24 via the bus 23.
sent to. CPU 24 receives data via bus 23 and performs processing operations.

In such a remote control system, a manual switch 25 is provided to give an initialization signal to the CPLJ 24 in case the CPU 24 stops due to temporary external noise or program runaway.

Therefore, when the CPU 24 stops, the switch 25
An initialization signal is given to the CPU 24 by operating the
24 will be restarted. However, in such a remote control system, the monitored device 20A is usually unmanned and is far away from the monitoring device 10A. For this reason, it takes time to operate the switch 25 to initialize the system, and this often results in a disadvantage that a quick response cannot be taken when an abnormality occurs.

On the other hand, in the remote control system shown in FIG. 4, abnormal stop detection is performed on the CPU 24 of the monitored device 20B.
A detection unit 26 is attached to give an initialization signal to the PU 24, and the C
When the P U 24 stops abnormally, it is automatically initialized. However, in such a remote control system, initialization is automatically performed regardless of the command from the monitoring device 10A, so if the cause of the CPU 24 stopping is unrecoverable, the stopping and initialization will be performed. This is repeated, and depending on the cause of the stoppage of the CPU 24, there may be problems such as destruction of the hardware.

(Problems to be Solved by the Invention) As mentioned above, according to the conventional remote control system, the monitored device is provided with a manual switch, and the monitored device is initialized with this or the The former method has the disadvantage of not being able to respond quickly when an abnormality occurs when the monitored device is unattended and located far from the monitoring device. According to Toshiya, if the cause of the stoppage is unrecoverable, initialization and stoppage will be repeated, and in some cases, the hardware will be destroyed, making the situation even worse. was there. The present invention was developed in view of the shortcomings of conventional remote control systems, and its purpose is to be able to respond quickly when an abnormality occurs, to perform accurate initialization, and to prevent hardware destruction. By providing a remote control system that can prevent the progress of

[Configuration of the Invention (Means for Solving Problems)] The present invention includes a monitoring device and a monitored device, and the monitored device performs a processing operation upon receiving data sent from the monitoring device. The monitoring device of the remote control system that includes the processing system that performs The remote control system is constructed by providing an initialization signal output section that provides an initialization signal to the processing system when it is detected that initialized data has been sent.

(Operation) According to the above configuration, the processing system of the monitored device is initialized by sending initialization data from the monitoring device, and the operator of the monitoring device can perform the initialization at the appropriate timing. becomes possible.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention. In this figure, the same components as in FIGS. 3 and 4 are denoted by the same reference numerals, and their explanations will be omitted. The monitoring device 10 in this embodiment is provided with an initialization data sending section 13. The initialization data sending unit 13 sends initialization data to the modulating unit 12 when the switch 14 is operated. In practice, the initialization data transmitting section 13 transmits the carrier to the modulating section 1 so as to transmit the carrier for a predetermined period that is sufficiently longer than the predetermined maximum length of data transmitted from the data transmitting section 11.
This is to give a control signal to 2. In addition, the switch 14
is replaced by one key on a keyboard provided on a control panel (not shown) of the monitoring device 10. On the other hand, the monitored equipment! 20 is provided with an initialization signal sending section 27, which receives the carrier detection section @CD from the demodulation section 21 and transmits the signal to the monitoring device 1.
It is detected whether initialization data has been sent from the initialization data sending unit 13 of 0, and when it is detected that initialization data has been sent, initialization is performed to the CPU 24 without going through the bus 23 of the processing system 28. give a signal. That is, when data is sent from the data transmitter 11 and a modulated signal is sent, data D is extracted and sent to the S/P converter as shown in part a of FIG. However, if the initialization data is sent from the initialization data sending unit 13, the data is not sent, and as shown in FIG. The message is sent for a predetermined period that is sufficiently longer than the predetermined maximum period To when the message is sent. In other words, the initialization signal sending unit 27 receives the carrier detection signal @CD from the demodulating unit 21 for the period T.
. When it is turned on for a sufficiently longer period T (TNTl), it outputs an initialization signal to the CPU 24. Note that the processing system 28 normally processes data from the demodulator 21 to the monitoring device 10.
It receives and processes data from the demodulator 21, and in the event of an abnormality, it stops and no longer receives data from the demodulator 21. Also,
It is assumed that the processing system 28 sends data indicating that it is in operation to the monitoring device 10 via means not shown.

In the remote control system as described above, when the processing system 28 is operating normally, data sent from the data transmitting section 11 is transmitted to the modulating section 12, the line 30. The data is sent to the processing system 28 via the demodulator 21, and the processing system 28 receives and processes this data (FIG. 2a). In this case, the processing system 28
From there, the data indicating that it is in operation is the monitoring device! 10, the operator does not send any initialization data.

In this case, the period T.

The initialization signal sending unit 27 does not output an initialization signal because the carrier detection signal CD is turned on and the initialization signal CD is too high.

When the processing system 28 of this remote control system stops abnormally,
Data indicating that the system is in operation is not sent to the monitoring device 10, and the operator knows that the system has stopped abnormally. Therefore, when the operator performs initialization, he operates the switch 14. This results in
Initialization data is sent from the initialization data sending unit 13,
The modulator 12 receiving this transmits only the carrier for a period T1. The demodulator 21 that receives this outputs the carrier detection signal CD of the on period T1 (see Fig. 2b).
). Upon receiving this, the initialization signal sending unit 27 outputs an initialization signal to the CPU 24 because the period T1 during which the received carrier detection signal CD is on is T1>T. Thereby, the CPU 24 initializes the processing system 28 and operates again.

In this way, in this embodiment, the switch 1 of the monitoring device 10
4 to initialize the processing system 28 of the monitored device 20, even if the monitored device 20 is unattended and in a remote location, after the monitoring device 10 learns that the processing system 28 has stopped abnormally. allows for quick response.

In this embodiment, the carrier is sent for the period T1 as initialization data (@2 Figure b), but this period T1
By sending the carrier twice (C in Figure 2) or more, it may be used as initialization data, and in this case, it can be initialized to indicate that the interval W between the carriers (C in Figure 2) is a predetermined width. In addition, data having a special pattern that is not used as normal data may be used as the initialization data. In this case, the initialization data is sent from the data transmitter 11 and the initialization signal transmitter 27 allows the demodulator 21 to branch from the signal line that sends data to the S/P converter 22 to receive data.

[Effects of the Invention] As explained above, according to the present invention, since initialization data is sent from the monitoring device to initialize the processing system, there is no need to go to the monitored device, and there is no need to go to the monitored device. Since it is possible to respond quickly and initialize while checking the status of the processing system, unlike cases where initialization is performed automatically, there is no possibility of unintentional damage to the hardware. can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
A flowchart for explaining one embodiment shown in the figure,
FIGS. 3 and 4 are block diagrams of conventional remote control systems. 10...Monitoring #A position 13...Initialization data sending unit 20...Monitored device @27...Initializing signal sending unit 28...Processing system agent Patent attorney Nori Chika Ken Yudo Sanno - Figure 1 Figure 3

Claims (1)

[Scope of Claims] A remote control system comprising a monitoring device and a monitored device, wherein the monitored device includes a processing system that receives data sent from the monitoring device and performs a processing operation, comprising: The monitoring device is provided with an initialization data sending unit that sends initialization data that instructs the stopped processing system to be initialized, and when it is detected that the initialization data is sent to the monitored device, A remote control system comprising: an initialization signal output section that provides an initialization signal to the processing system.