JPH055426B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a supervisory control system using telephone lines.

[Background Art] Such a monitoring control system connects one or more transmitting devices to one receiving device via a telephone line, and the transmitting device receives abnormality detection from an abnormality detection means. It is configured to report the signal to the receiving device side via a telephone line, and to issue appropriate instructions from the receiving device side.

By the way, when applying such a supervisory control system, if there is no person in charge on the transmitting device side, it is necessary to send a control signal from the receiving device side to the transmitting device side to control the external state of the transmitting device. Although it is preferable to remotely control the equipment, if there is a person in charge on the transmitting device side, it is desirable to call the person in charge via telephone and give appropriate instructions to the person in charge.

In conventional wide area monitoring and control systems, if the system is configured in one direction (only sending abnormalities from the transmitting device to the receiving device), the telephone attached to the transmitting device can make and receive calls. If the system is configured bidirectionally (the transmitting device sends an abnormal signal to the receiving device, and the receiving device sends a control signal to the transmitting device), the telephone attached to the transmitting device is used only for making calls. It's summery.

[Objective of the Invention] The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a system that is effective when there are people in a monitored area using one telephone line. To provide a supervisory control system capable of switching between a one-way system and a two-way system that is effective when no one is present in the monitored area.

[Disclosure of the Invention] In order to achieve the above object, a supervisory control system using a telephone line according to the present invention includes an abnormality detection means,
A transmitting device equipped with an external device and attached with a telephone set is combined with a receiving device attached with a telephone set and connected to the transmitting device via a telephone line, and when the above-mentioned abnormality detection means detects an abnormality, the above-mentioned In a supervisory control system configured to automatically report an abnormality from a transmitting device to the receiving device, the transmitting device has a reception mode changeover switch, and the reception mode set by the changeover switch is transmitted to the reception device. When the system is set to unattended receiving mode, the transmitting device is set to automatic receiving mode, and as a result, the transmitting device When the system sends an abnormality report to the receiving device, the receiving device sends a control signal to the transmitting device to drive the external device, while when the system is set to manned reception mode, the transmitting device automatically receives the call. As a result of the mode being canceled, when the transmitting device reports an abnormality to the receiving device, the telephone attached to the receiving device calls the telephone attached to the transmitting device and gives necessary instructions. It's summery.

[Operation of Supervisory Control System] The basic operation of the system of the present invention is as follows.

(Operation when unattended reception mode is set) When the reception mode selector switch of the transmitter is set, the transmitter is set to automatic receiving mode, and an unattended reception mode setting signal is sent to the receiver.
The system is set to unattended reception mode.

In this state, when the transmitting device receives an abnormality detection signal from the abnormality detection means, the transmitting device calls the receiving device through the telephone line and transmits the abnormality signal (abnormality notification).

The receiving device that receives this abnormal signal determines that the system is set to unattended reception mode and calls the transmitting device.The receiving device automatically receives the call, so all you have to do is send the necessary control signal to the transmitting device. , an external device provided on the transmitter side is driven according to the control signal.

(Operation when set to manned reception mode) When the reception mode switch on the transmitter is reset, the automatic call reception mode of the transmitter is canceled.
A manned reception mode setting signal is transmitted to the receiving device, and the system is set to manned reception mode.

In this state, when the transmitting device receives an abnormality detection signal from the abnormality detection means, the transmitting device calls the receiving device through the telephone line and transmits the abnormality signal (abnormality notification).

The receiving device that receives this abnormal signal determines that the system is set to manned reception mode, calls the telephone attached to the transmitting device from the telephone attached to the receiving device, and issues necessary instructions. do.

Embodiment FIG. 1 is a block diagram showing an embodiment of the supervisory control system of the present invention.

In this embodiment, the receiving device 1 and the transmitting device 2 are one
They are connected via two telephone lines 3. When the transmitting device 2 receives a signal from an abnormality detection means (not shown) such as a temperature detector, it is inputted to the microcomputer 23 via the input circuit 24, modulated by the modem 22, and sent to the telephone line 3 from the NCU 21. . When receiving a control signal from the receiving device 1 and performing a control output to an external device, the control signal is demodulated by the modem 22, processed by the computer 23, and outputted to the external device (not shown) via the output circuit 25. Ru. A telephone 26 is attached to the transmitting device 2, and this telephone 26 is capable of making and receiving calls. Further, the door of the room where the transmitting device 2 is installed is provided with an external switch 27 that is interlocked with the lock. The switch 27 is a reception mode change-over switch, and is set to set the unmanned reception mode when the room of the transmitter 2 is unoccupied, and reset to set the manned reception mode when a person in charge is present.

On the other hand, in the receiving device 1, the signal sent from the transmitting device 2 is input to the modem 12 via the NCU 11, demodulated, and then sent to the microcomputer 13.
Process with. In this example, CRT is used as the display device.
15, the processed signal is CRT
The signal is sent to the drive circuit 14 and the necessary display is made on the CRT 15. When sending a control signal to the transmitting device 2, the control signal processed by the computer 13 is sent to the modem 12, modulated, and sent to the telephone line 3. Also, the transmitting device 1 includes a telephone 1
6 is attached.

The control procedure in the supervisory control system according to this embodiment will be explained with reference to the flowcharts shown in FIGS. 2a to 2c. In the following explanation, the second a
The main parts of the program shown in FIGS. 2A to 2C will be described, and the details are as shown in FIGS. 2A to 2C.

First, the transmitting device 2 and receiving device 1 are set to be able to switch reception modes (steps 101 and 201).
The person in charge of the transmitting device 2 resets the external switch 27 upon entering the room (step 303). The transmitting device 2 reads the state of the switch 27, stores it in memory, and transmits it to the receiving device 1 (step
202-205). Receiving device 1 stores this switch status information in memory (step 106). As a result, the automatic call receiving mode of the transmitting device 2 is canceled, so that the transmitting device 2 cannot receive a call from the receiving device 1. The receiving device 1 receives the switch status information transmitted from the transmitting device 2 and stores it in the memory (steps 102 to 106). The above result system is
Set to manned reception mode.

In this state, when the transmitting device 2 receives an abnormal signal from the abnormality detecting means (step 206), this information signal is transmitted to the receiving device 1 (steps 213 to 215).
The receiving device 1 reads the switch status in memory. In this case, since the switch 27 has been reset, the receiving device 1 determines that it is in the manned reception mode (step 107), and displays on the CRT 15 that it will not send a control signal (step 107).
108). A person in charge of the receiving device 1 uses the attached telephone 16 to call the telephone 26 attached to the transmitting device 2. Memorized switch 2
7 is reset and is in the manned reception mode, the transmitting device 2 requests that the telephone 26 respond to the call (step 7).
216-219). The person in charge of receiving device 1 should use telephone 1
6, the necessary instructions are given to the person in charge on the transmitter 2 side (steps 109, 220). Based on this instruction, the person in charge of the transmitting device 2 operates the key input section of the transmitting device 2 to perform control output to the external device.

When the person in charge of the transmitting device 2 leaves the room, the switch 27 is set, and the change in the switch state is read into the transmitting device 2 and stored in the memory (steps 207 to 209), and at the same time the switch 27 is set. 1 to inform that the switch 27 has been changed to the set state (steps 210 to 212). Receiving device 1
This new switch state is then rewritten in memory (step 106). As a result, the transmitting device 2 is set to the automatic call receiving mode, so that the telephone 26 is unable to receive calls.

In this unattended reception mode state, the transmitter 1
If an abnormal signal is input to the receiver, this information is transmitted to the receiver 1 in the same way as described above (step
214), and receiving device 1 receives this (step 214).
104), and determines that it is in unattended reception mode (step 107). Based on the received signal, necessary control signals are transmitted to the transmitter 2 (step 110). Since the stored state of the switch 27 is set and the transmitting device 2 is in unattended reception mode, upon receiving this control signal (step 221), it automatically outputs a control signal to the external device (step 221). Step 222).

In the above-mentioned embodiment, the external switch 27 is linked with the lock of the door where the transmitting device 2 is installed, but the switch 27 may also be provided at an appropriate position such as near the transmitting device 2. good.

Further, in order to simplify the explanation, an embodiment in which one transmitting device is provided for one receiving device has been shown, but the present invention provides a method in which a large number of transmitting devices are provided for one receiving device. Of course, the present invention can also be applied to a supervisory control system equipped with.

[Effects of the Invention] As is clear from the above explanation, in the supervisory control system using the telephone line of the present invention, the manned reception mode and the unmanned reception mode can be easily set using the reception mode setting switch, and Switching between a unidirectional system and a two-way system is now automatic, and only one telephone line is used in either case, allowing efficient use of telephone lines.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
Fig. 2a is a flowchart of a receiving apparatus, Fig. 2b is a flowchart of a transmitting apparatus, and Fig. 2c is a flowchart of a person in charge of the transmitting apparatus. 1... Receiving device, 2... Transmitting device, 3... Telephone line, 16, 26... Telephone, 27... Mode setting switch.

Claims (1)

[Scope of Claims] 1. A transmitting device equipped with an abnormality detection means and an external device and attached with a telephone, and a receiving device attached with a telephone and connected to the transmitting device via a telephone line, and the above-mentioned In the monitoring control system configured to automatically notify the abnormality from the transmitting device to the receiving device when the abnormality detection means detects an abnormality, the transmitting device has a reception mode changeover switch, The set reception mode is transmitted to the above-mentioned receiving device, and the system is configured to be selectively set to unattended reception mode or manned reception mode, and when the system is set to unattended reception mode, the above-mentioned transmitting device automatically As a result of being set to incoming call mode, when the transmitting device sends an abnormality report to the receiving device, the receiving device sends a control signal to the transmitting device to drive the external device, while the system switches to manned reception mode. When set, the automatic call receiving mode of the transmitting device is canceled, and when the transmitting device sends an abnormality report to the receiving device, the telephone attached to the transmitting device side is notified from the telephone attached to the receiving device side. A supervisory control system that uses a telephone line to call and issue necessary instructions.