KR101860665B1 - Water Treatment Plant Communication Error Autorecover System and Recovery Method thereof - Google Patents

Abstract

The present invention relates to automatic recovery system and method of a water treatment plant communication error, which are realized to reboot a communication device, and simultaneously to reserve data transmitted from a water treatment plant by automatically backing up the data when an error of the communication device performing communication of the water treatment plant occurs. The system comprises: a PLC device installed to be connected to the water treatment plant for connecting data communication with the water treatment plant; a DSU device installed to be connected to a central observation system in a remote place for connecting data communication with the central observation system; and an error restoring device which is installed to be connected between the PLC device and the DSU device, resets a power supply of the DSU device by being activated from a sleep mode when a malfunction of the DSU device or the PLC device is detected, receives water treatment plant data from the PLC device and stores the water treatment plant data during rebooting time of the DSU device, and transmits the stored water treatment plant data to the PLC device when the reboot of the DSU device is completed.

Description

[0001] The present invention relates to a water treatment plant communication error automatic recovery system and an automatic recovery method,

The present invention relates to a water treatment plant communication error automatic restoration system and an automatic restoration method, and more particularly, to a water treatment plant communication error automatic restoration system and an automatic restoration method, The present invention relates to an automated water recovery system and an automatic recovery method.

Water treatment plants, such as pumping stations, reservoirs or storm pumping stations, typically have a communication scheme such as a site (PLC) -> a communication company (DSU equipment) -> a business site (telecommunication communication equipment) -> a business site (ETOS) Have.

In case of water treatment plant, 1) If various signals such as pressure, flow rate, motor inverter frequency Hz, operation confirmation input signal, communication abnormality, and power failure are transmitted to the establishment (central monitoring system) in the field, 2) 3) PID control is set through PID control device and pressure signal is received to drive PID control. 4) PID value is set as auto operation condition. 5) When the operator sets pressure in the central monitoring system and confirms it, it is general that the analog signal is input to the PLC and the PID setting value is changed.

Korean Registered Patent No. 10-0867872 (November 3, 2008) discloses a method of automatically adjusting the communication speed, which may be caused by a structure of the data receiving buffer of the slave module and a timing of receiving data received from the master module, The present invention relates to a communication speed matching method for a plurality of modules in a PLC capable of improving user convenience and network reliability by providing a more stable communication module by having a faster response than an existing method, A first step of recognizing identification information of the slave module when the power is supplied and automatically setting the identification information at a predetermined communication speed; After performing the first step, the slave module receives the data transmitted from the master module at the set communication rate, checks whether the received data is in a normal state that can be analyzed, and sets the communication speed flag to on or off. A second step of setting a communication rate flag to an on state if the data is in an interpretable normal state; A third step of checking the state of the communication speed flag and determining whether the communication speed of the communication speed flag is in a state of mutual agreement with the communication speed of the master module; And if the communication speed of the slave module coincides with the communication speed of the master module, the slave module checks whether the identification information is redundant and the network connection status, and waits for data transmission / reception with the master module when there is no abnormality And a control unit. According to the disclosed technology, it is possible to eliminate the network status error detection function through the received data in order to prevent an error that may occur in the internal structure of the slave module and data flow, that is, It is possible to prevent the error that the master module and the slave can not start communication because the received data stored in the receiving buffer moves to the reserved area which is not currently used due to the data received from the master module can do.

Korean Patent No. 10-0208335 (Jun. 10, 1998) discloses a communication error detection method that can prevent an error occurring during communication between a CCU of a PLC and a computer in advance. According to the disclosed technology, there is provided a communication error detection method between a computer (PLC) including a computer communication unit and a computer connected to the computer communication unit via a communication line, the method comprising: The method comprising the steps of: applying power to the computer communication unit and the computer; determining whether there is an abnormality in the computer communication unit after the power applying step; The method comprising the steps of: illuminating an alarm lamp provided in the computer communication unit; transmitting a predetermined test signal from the computer to the computer communication unit to induce a predetermined response if there is no abnormality in the computer communication unit; The communication unit generates a response signal corresponding to the test signal, Subject is in phase with, the method comprising the computer is the receipt of the response signal, the computer characterized in that it comprises the step of determining whether the presence or absence or the top of the response signal.

In the communication device used in the conventional water treatment plant as described above, when the operator inputs a motor ON / OFF control signal in the central monitoring system, the communication company (DSU) There is a problem that when an operator generates an error while a control signal is being transmitted, the operation signal is continuously recognized on the PLC program, thereby causing a malfunction.

Korean Patent No. 10-0867872 Korean Patent No. 10-0208335

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a communication device, And provides an automatic recovery system and an automatic recovery method.

In order to solve such a problem, according to one aspect of the present invention, there is provided a PLC apparatus for connecting data communication with a water treatment plant connected to a water treatment plant; A DSU device for establishing a connection with a central monitoring system at a remote location and connecting data communication with the central monitoring system; And a controller connected between the PLC device and the DSU device and activated from a sleep mode when a malfunction of the DSU device or the PLC device is detected to reset the power of the DSU device, And an error recovery device that receives and stores the water treatment plant data from the PLC device during the reboot time of the apparatus and transmits the stored water treatment plant data to the PLC device when the rebooting of the DSU device is completed, Recovery system.

In one embodiment, the PLC device performs data communication with the DSU device and the first communication line, performs data communication with the error recovery device and the second communication line, and performs data communication malfunction The signal to the error recovery device may be changed from low to high and the water treatment plant data may be transmitted to the error recovery device through the second communication line.

In one embodiment, when the data communication malfunction with the DSU device is solved after the rebooting of the DSU device is completed, the PLC device requests the error recovery device to transmit the water treatment plant data, And may transmit the requested water treatment plant data to the DSU apparatus through the first communication line when receiving the requested water treatment plant data.

In one embodiment, the PLC apparatus further includes an automatic reset request signal for automatically resetting the DSU apparatus when a data communication malfunction with the DSU apparatus is not solved even after the reboot of the DSU apparatus is completed, or a manual reset A manual reset request signal may be generated and transmitted to the central monitoring system.

In one embodiment, the error recovery apparatus can detect that a malfunction has occurred in the DSU apparatus or the PLC apparatus when a signal from the PLC apparatus changes from low to high.

In one embodiment, the error recovery device includes: a memory unit for storing water treatment plant data received from the PLC device; A sensing unit for sensing that a malfunction has occurred in the DSU device or the PLC device and generating a malfunction detection signal corresponding to the malfunction; A reset command unit connected to the DSU unit for resetting the DSU unit according to a reset request signal; And a reset request signal for activating the power of the DSU device from a sleep mode when the malfunction detection signal is transmitted from the sensing unit to the reset command unit, And transmitting the water treatment plant data stored in the memory unit to the PLC device when the rebooting is completed.

In one embodiment, the memory unit may store the water treatment plant data in units of 10 seconds.

In one embodiment, the control unit may enter a sleep mode when transfer of water treatment plant data to the PLC device is completed.

According to another aspect of the present invention, when a PLC device malfunctions in a data communication with a DSU device, a signal with the error recovery device is changed from Low to High, and then, through a second communication line, An error detection step of transmitting data to the error recovery device; A reset step of activating the error recovery device from a sleep mode when a malfunction of the DSU device or the PLC device is detected and resetting power of the DSU device; A data storage step of receiving and storing water treatment plant data from the PLC device during a time when the error recovery device reboots the DSU device; A data request step of requesting the error recovery device to transmit water treatment plant data when a malfunction of data communication with the DSU device is solved after the PLC device completes rebooting of the DSU device; A data transfer step of transferring water treatment plant data stored by the error recovery device in response to a request from the PLC device to the PLC device; And a normal communication step in which the PLC device receives the water treatment plant data requested by the error recovery device and transmits the data to the DSU device via the first communication line.

In one embodiment, in the data requesting step, if the data communication malfunction with the DSU device is not solved even after the rebooting of the DSU device is completed by the PLC device, an automatic reset request signal for automatically resetting the DSU device Alternatively, a manual reset request signal for manually resetting can be generated and transmitted to the central monitoring system.

According to the present invention, there is provided a water treatment plant communication error recovery system and an automatic recovery method that are implemented to reboot the communication device when an error occurs in a water treatment plant communication device and at the same time to automatically backup and protect data transmitted from a water treatment plant (DSU) equipment, it is necessary to reset the communication company (DSU) equipment by rebooting to normalize it. At the same time, after data backup from the water treatment plant is backed up, (For example, whether the flow rate such as the pressure value applied to the piping normally flows, etc.) transmitted from the water treatment plant during the communication malfunction can be safely stored.

1 is a view for explaining a water treatment plant communication error automatic restoration system according to an embodiment of the present invention.
2 is a view for explaining the error recovery apparatus shown in FIG.
3 is a flowchart illustrating a water treatment plant communication error recovery method according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Hereinafter, a water treatment plant communication error automatic restoration system and an automatic restoration method according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a view for explaining a water treatment plant communication error automatic restoration system according to an embodiment of the present invention.

1, a water treatment plant communication error automatic restoration system includes a PLC apparatus 100, a DSU apparatus 200, and an error recovery apparatus 300. As shown in FIG.

The PLC device 100 is connected to a water treatment plant such as a pumping station, a reservoir or a rainwater pumping station and is connected to the DSU apparatus 200 and the error recovery apparatus 300. Data between the water treatment plant and the DSU apparatus 200 The data communication between the communication or water treatment plant and the error recovery device 300 is connected.

In one embodiment, the PLC device 100 is a power line communication, and a power line communication (PLC) is a device that transmits voice, text data, video, etc. using a power line that supplies electricity to a general household or office The new technology has been studied since the 1920s and can be used in a wide range of applications, from high-speed Internet communications to VoIP, home networking, home automation and remote meter reading.

The DSU apparatus 200 is connected to a central monitoring system for monitoring and controlling a water treatment plant at a remote site and connects data communication between the central monitoring system and the PLC apparatus 100.

In one embodiment, the DSU device 200 is a digital service unit, which may refer to a device that converts an analog signal into a form suitable for movement in a digital transmission path.

The error recovery device 300 is connected between the PLC device 100 and the DSU device 200 and is connected to the sleep mode when the malfunction of the DSU device 200 or the PLC device 100 is detected (E.g., a state in which the power utility is minimized as a sleep mode) to reset the power supply of the DSU 200, and during the reboot time of the DSU 200 Time 30 to 50 seconds and so on) receives and stores the water treatment plant data from the PLC device 100 and transmits the stored water treatment plant data to the PLC device 100 when the rebooting of the DSU device 200 is completed.

In one embodiment, the PLC device 100 performs data communication with the DSU device 200 by the first communication line, performs data communication with the error recovery device 300 by the second communication line, When the data communication malfunction of the device 200 occurs, the signal to the error recovery device 300 is changed from Low to High and then the water treatment plant data 200 transmitted to the DSU device 200 through the second communication line To the error recovery device 300.

In one embodiment, the error recovery device 300 reads the change of the signal when the signal with the PLC device 100 changes from Low to High, and outputs the change of the signal to the DSU device 200 or the PLC device 100 can be detected as a malfunction.

In one embodiment, the error recovery device 300 can store the forwarded water treatment plant data when the water treatment plant data transmitted from the PLC device 100 to the DSU device 200 via the second communication line is transmitted have.

In one embodiment, when the data communication malfunction with the DSU apparatus 200 is resolved after the rebooting of the DSU apparatus 200 is completed, the PLC apparatus 100 requests the error recovery apparatus 300 to transmit the water treatment plant data Upon receipt of the requested water treatment plant data from the error recovery device 300, the data can be transmitted to the DSU device 200 through the first communication line.

In one embodiment, when there is a request to transmit water treatment plant data from the PLC device 100, the error recovery apparatus 300 confirms the requested water treatment plant data, and transmits the confirmed water treatment plant data to the error communication system via the second communication line To the PLC device 100.

The PLC device 100 may perform an automatic reset for automatically resetting the DSU device 200 when a data communication malfunction with the DSU device 200 is not resolved after the rebooting of the DSU device 200 is completed, A request signal or a manual reset request signal for performing a manual reset and transmits the generated automatic reset request signal or the manual reset request signal to the central monitoring system through a separate communication line.

FIG. 4 shows a communication system of a conventional water treatment plant. According to a conventional water treatment plant communication system, when an operator inputs a motor N / OFF control signal of a water treatment plant in a central monitoring system, And communication is abnormally operated frequently. In addition, when an operator generates an error in a communication device while transmitting a control signal, the motor or opening must be turned off in the PLC program, and an accident that the operation signal continues to be recognized frequently occurs frequently.

Therefore, in the present invention, when the error recovery person is contacted and the A / S is connected, the communication is normally restored when the DSU fixes the communication and turns the power OFF and ON. The power of the communication equipment is turned off once and turned on to induce the normal operation of the DSU and the data during the rebooting time of the corresponding DSU is separately stored to prevent data loss.

The water treatment plant communication error automatic restoration system having the above-described configuration is a system for preventing the data from being lost until the arrival of the A / S team at the site when the DSU apparatus 200, which is an unmanned automated communication apparatus, Data of a malfunction time of the corresponding DSU apparatus 200 is stored in the error recovery apparatus 300 and the data stored in the error recovery apparatus 300 when the DSU apparatus 200 is normalized is stored in the central monitoring system , It is possible to save the data to be displayed in the Excel file at the designated time, and it is possible to confirm the data such as how much pressure is applied to the piping or whether the flow rate is normally flowing You can judge.

In the water treatment plant communication error recovery system having the above-described configuration, the error recovery apparatus 300 can receive the digital signal and increase the output terminal so as to output the output. When a failure occurs in various instruments in the field It can receive the input with the digital signal and restore the output according to the condition and make the condition in the safe direction according to the field conditions.

In the water treatment plant communication error automatic restoration system having the above-described configuration, the communication device is rebooted upon occurrence of a fault in the DSU device 200, which is a device responsible for communication in the water treatment plant, (DSU) equipment is reset by resetting the communication company (DSU) equipment when the communication company (DSU) equipment erroneously erroneously occurs, and the data transmitted from the water treatment plant is backed up The data backed up by the communication company (DSU) equipment is transferred to the central monitoring system to safely store the information transmitted from the water treatment plant during communication failure (eg, whether the flow rate such as the pressure value applied to the piping normally flows) have.

Fig. 2 is a view for explaining the error recovery device shown in Fig. 1. Fig.

Referring to FIG. 2, the error recovery apparatus 300 includes a memory unit 310, a sensing unit 320, a reset instruction unit 330, and a control unit 340.

The memory unit 310 receives the water treatment plant data from the PLC device 100, and receives and stores the water treatment plant data.

The sensing unit 320 senses that a malfunction has occurred in the DSU device 200 or the PLC device 100 and generates a malfunction detection signal corresponding to the malfunction detection signal and transmits the generated malfunction detection signal to the control unit 340.

The reset command unit 330 is connected to the DSU apparatus 200 and resets the DSU apparatus 200 in response to the reset request signal transmitted from the control unit 340. At this time, the reset of the DSU apparatus 200 can be performed by changing the power state of the DSU apparatus 200 from off to on.

The control unit 340 generates a reset request signal for resetting the power of the DSU 200 after being activated from the sleep mode when the malfunction detection signal is transmitted from the sensing unit 320, And transmits the generated reset request signal to the reset command unit 330. When the reboot of the DSU apparatus 200 is completed, the control unit 310 confirms the water treatment plant data stored in the memory unit 310, To the PLC device 100 via the communication line.

In one embodiment, the memory unit 310 may store the water treatment plant data in units of 10 seconds.

In one embodiment, the memory unit 310 may receive and store analog data per 10 seconds at 10, 20, 30, or 40 seconds of the data storage area.

In one embodiment, the control unit 340 minimizes the power consumption by entering the sleep mode when the transfer of the water treatment plant data to the PLC device 100 is completed.

3 is a flowchart illustrating a water treatment plant communication error recovery method according to another embodiment of the present invention.

3, when a data communication malfunction with the DSU device 200 occurs in the PLC device 100, the signal with the error recovery device 300 is changed from low to high, Line data to the error recovery device 300 (S310).

When the malfunction of the DSU device 200 or the PLC device 100 is detected, the error recovery device 300 is activated from the sleep mode to reset the power of the DSU device 200 (S320) .

In the error recovery apparatus 300, the water treatment plant data is received from the PLC device 100 during the reboot time of the DSU apparatus 200 (S330).

The PLC device 100 requests the error recovery device 300 to transmit water treatment plant data when the data communication malfunction with the DSU device 200 is resolved after the rebooting of the DSU device 200 is completed in step S340.

If the data communication malfunction with the DSU device 200 is not solved even after the PLC device 100 completes the rebooting of the DSU device 200 in the above-described step S340, the automatic reset for automatically resetting the DSU device 200 A request signal or a manual reset request signal for manual reset can be generated and transmitted to the central monitoring system.

The error recovery apparatus 300 transmits the water treatment plant data stored in response to the request from the PLC apparatus 100 to the PLC apparatus 100 through the second communication line (S350).

When the PLC device 100 receives the water treatment plant data requested from the error recovery device 300, the PLC device 100 transmits the data to the DSU device 200 through the first communication line (S360).

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented by a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded, And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: PLC device
200: DSU device
300: Error recovery device
310:
320:
330: Reset command section
340:

Claims (5)

A PLC (Programmable Logic Controller) device connected to the water treatment plant for connecting data communication with the water treatment plant;
A DSU device for establishing a connection with a central monitoring system at a remote location and connecting data communication with the central monitoring system; And
The DSU device is connected to the PLC device and the DSU device. When a malfunction of the DSU device or the PLC device is detected, the device is activated from a sleep mode to reset the power of the DSU device, And an error recovery device that receives and stores water treatment plant data from the PLC device during a reboot time and transmits the stored water treatment plant data to the PLC device when rebooting of the DSU device is completed,
The PLC device comprising:
A data communication is performed by the DSU device and the first communication line, data communication is performed by the error recovery device and the second communication line, and a signal transmitted to the error recovery device when a data communication malfunction of the DSU device occurs From the low level to the high level and then transmits the water treatment plant data to the error recovery device through the second communication line,
Wherein the error recovery device detects that a malfunction has occurred in the DSU device or the PLC device when a signal received from the PLC is changed from low to high,
Wherein the error recovery device comprises: a memory unit for storing water treatment plant data received from the PLC device; A sensing unit for sensing that a malfunction has occurred in the DSU device or the PLC device and generating a malfunction detection signal corresponding to the malfunction; A reset command unit connected to the DSU unit for resetting the DSU unit according to a reset request signal; And a reset request signal for activating the power of the DSU device from a sleep mode when the malfunction detection signal is transmitted from the sensing unit to the reset command unit, And a control unit for transmitting the water treatment plant data stored in the memory unit to the PLC apparatus when rebooting is completed,
The reset command unit
When the reset request signal is transmitted from the control unit, the DSU unit is reset according to the transmitted reset request signal. At this time, the reset of the DSU unit is performed by changing the power supply state of the DSU unit from off to on,
The control unit confirms the water treatment plant data stored in the memory unit when the rebooting of the DSU apparatus is completed, transmits the confirmed water treatment plant data to the PLC apparatus via the second communication line,
The PLC device comprising:
When a malfunction of a data communication with the DSU device is solved after rebooting of the DSU device is resolved, the error recovery device requests transmission of water treatment plant data to the error recovery device, and upon receipt of requested water treatment plant data from the error recovery device, Lt; RTI ID = 0.0 > DSU < / RTI &
The PLC device comprising:
If a data communication malfunction with the DSU device is not solved even after the rebooting of the DSU device is completed, an automatic reset request signal for automatically resetting the DSU device or a manual reset request signal for manually resetting the DSU device is generated, And transmitting the data to the monitoring system.
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