JPH0322835A - Monitor/controller - Google Patents

Abstract

PURPOSE:To prevent disturbance even when a monitor/controller is down by setting each control item to safe side, when the voltage of backup power source drops below a predetermined level, and stopping control. CONSTITUTION:Upon droppage of the output voltage from a battery 2 below a predetermined level(10V), a voltage drop detector 3 detects the voltage drop and produces a control signal 200 for switching the switch group contained in a control mode switching section 5 to the terminal (b) side. Relay contact ON/OFF information 301-30n for setting the under trouble control items preset in a trouble mode setting section 7 to safety side is ted through a control mode switching section 5 and inverters 91-9n to the base of transistors 81-8n. Consequently, relay contact 42 at relay contact drive section 41 is opened and door open/ close drive section 10 performs door opening operation.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is directed to monitoring and control on the terminal side of a system that controls the opening/closing of doors, etc., and the lighting control of lights, etc. located at a distance via a line. Regarding equipment.

(Prior art) Conventionally, this type of system has a structure as shown in FIG.
11 to 213 collect alarm information (human intrusion, etc.) using the sensor 211 and transmit it to the monitoring center 23 via the Internet BIli1 (public network) 22. Based on this, for example, a door opening command (control information) is transmitted to the supervisory control device 211 via the line network 22.The supervisory control device 211 decodes the received open command and sends it to the relay contact drive circuit 2.
12 to open the door not shown. By the way, if the monitoring and control devices 211 to 213 on the terminal side experience a power outage, the collection of the information, relay contact control, etc. become impossible. Therefore, the supervisory control devices 211 to 2
13 is equipped with a battery that serves as a backup power source during a power outage, making it possible to cope with temporary power outages. However, even in this case, if the power outage continues for a long time, the output voltage of the battery decreases and the relay contact control is not performed as intended, resulting in confusion such as the door not opening.

(Problem to be solved by the invention) As described above, in a system in which commands are issued from a monitoring center to a supervisory control device via a line network and relay contacts are opened and closed in response to the commands, a power outage occurs on the supervisory control device side. In this case, if the voltage of the backup battery drops, the supervisory control device will not be able to control the relay contacts normally in response to commands from the monitoring center, and the door will not open. However, there were drawbacks such as various problems such as the lights remaining off.

Therefore, the present invention eliminates the above-mentioned drawbacks, and when the voltage of the backup power supply in the event of a power outage falls below a predetermined value, each control item can be set to a safe side where no problems will occur and the control can be stopped. The purpose is to provide a monitoring and control device.

[Structure of the invention]

(Means for Solving the Problems) The present invention controls the opening and closing of relay contacts that operate controlled devices based on control information transmitted from a monitoring center via a line network, and also provides backup in the event of a power outage. The supervisory control device performs the above control using a commercial power source, and includes voltage detection means for detecting whether the output voltage of the backup power source becomes a predetermined value or less in the event of a power outage, and predetermined control information. When the output voltage of the backup power supply becomes equal to or less than a predetermined value by the fixed information holding means and the voltage detection means, opening/closing control of the relay contact is performed based on the control information held in the fixed information holding means. (Function) In the supervisory control device of the present invention, the voltage detection means detects whether the output voltage of the backup power source has fallen below a predetermined value during a power outage. .The fixed information holding means holds predetermined control information.When the output voltage of the backup power source becomes equal to or less than a predetermined value by the voltage detection means, the control means is held in the fixed information holding means. Opening/closing control of the relay contacts is performed based on the control information provided.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the supervisory control device of the present invention. 1 is a monitoring control device that transmits alarm information to a center (not shown) or controls the opening and closing of relay contacts for control items in response to commands from the center; 2;
3 is a battery that supplies backup power during a power outage;
41 to 4o are relay contact drive units that switch the mode of each control item, and have a drive coil 41 and a relay contact 42. There is. Reference numeral 5 denotes a control mode switching unit for switching whether to perform opening/closing control of relay contacts corresponding to each of the control items in normal mode or failure mode, and reference numeral 6 denotes control information sent via a line network from a center side (not shown). 7 is a failure mode setting that supplies relay contact on/off information to safely control each control item when the voltage of the battery 2 drops. Part, 81~
8o is a transistor for driving the drive coil 41; 91-
9o is an inverter that inverts relay contact on/off information.

Next, the operation of this embodiment will be explained. Normally, the supervisory control device operates using ACIOOV supplied from a commercial power source as a power source. In this case, the control information decoding unit 6 inputs the control information 100 of the control items transmitted from the center side (not shown), and decodes this information to open and close the relay contacts 42 that operate each control item. The on/off information 101 to Ion is output to the control mode switching unit 5.

Here, when there is no power outage, the voltage drop detection section 3 detects a voltage equal to or higher than the predetermined voltage (IOV), so the control mode switching section 5 switches the built-in switch group to the terminal a side. Therefore, the relay contact on/off information 101 to l "On" output from the control information decoding section 6 is determined by the switching section 5.
The voltage is applied to the cathode side of the inverters 91 to 9o via the inverters 91 to 9o, and after the polarity is inverted by these inverters, the voltage is applied to the bases of the transistors 81 to 8n2.Thereby, the transistors 81 to 8o It is turned on or off depending on the contact on/off information, and a current flows through the drive coil 41 connected to the turned-on transistor to close the corresponding relay contact 42, and a current flows through the drive coil 41 connected to the turned-off transistor. Since no flow occurs, the corresponding relay contact 42 is opened.

For example, when the relay contact 42 of the relay contact drive section 41 closes, the door opening/closing drive section 10 performs an operation to close a door (not shown). Next, during a power outage, the power consumed by the device is supplied from battery 2, but the supply voltage (rated 12V) is set to a predetermined value (12V).
0V) or more, the voltage drop detection section 3 outputs a control signal 200 that switches the built-in switch group of the control mode switching section 5 to the terminal a side. Therefore, the relay contact on/off information 101 to Ion output from the control information decoding unit 6 is applied to each of the transistors 81 to 8o described above via the control mode switching unit 5 and the inverters 91 to 9o, and is transmitted from the center side. Relay contact 42 according to control information
Opening/closing control is performed.

In such a state, the output voltage of the battery 2 reaches a predetermined value (I
OV), the voltage drop detection section 3 detects this and switches the built-in switch group of the control mode switching section 5 to terminal b.
A switching control signal 200 for switching to the side is output. At this point, the switch group built in the control mode switching unit 5 switches to the terminal b side, so the relay contact is turned on and off to safely control the control items in the event of a failure, which are preset in the failure mode setting unit 7. Information 301-30n is supplied to the bases of transistors 81-8o via the control mode switching section 5 and inverters 91-9o. Therefore, the relay contacts 42 of the relay contact drive sections 41 to 4n corresponding to each control item are opened or closed according to the relay contact on/off information output from the failure mode setting section 7, and are fixed as they are. For example, the relay contact 42 of the relay contact drive section 41 is opened, and thereby the door opening/closing drive section 10 performs the operation of opening the door.

According to this embodiment, when the supply voltage of the battery 2 falls below a predetermined value during a power outage, the relay contacts 42 of the relay contact drive units 41 to 4o corresponding to each control item are set in the failure mode setting unit 7 in advance. Relay contact on/off information 301-3
After being fixedly and safely controlled by 0n, the functions of the supervisory control device 1 are stopped, so there is no possibility that the door will not open or the lights will not turn on, and even if the supervisory control device 1 This will ensure that even if something goes down, it won't cause a big mess.

〔Effect of the invention〕

As described above, according to the supervisory control device of the present invention, when the voltage of the backup power supply during a power outage falls below a predetermined value, each control item is set to the safe side where no problem will occur and control is stopped. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the monitoring and control device of the present invention, and FIG. 2 is a block diagram showing an example of a conventional remote monitoring and control system. 1... Monitoring control device 2... Battery 3... Voltage drop detection sections 41 to 4,... Relay contact drive section 5... Control mode switching section 6... Control information decoding section 7...・Failure mode setting section 81 to 8o...Transistor 42...Relay contact

Claims (1)

[Claims] A monitoring and control device that controls the opening and closing of relay contacts that operate controlled devices based on control information transmitted from a monitoring center via a line network, and also performs the above control using a backup power source in the event of a power outage. , a voltage detecting means for detecting whether the output voltage of the backup power supply becomes equal to or lower than a predetermined value at the time of a power outage; a fixed information holding means for holding predetermined control information; and control means for controlling the opening and closing of the relay contacts based on the control information held in the fixed information holding means when the output voltage of the backup power supply becomes equal to or less than a predetermined value. monitoring and control equipment.