KR20070115402A - Multi-routes communication system with multi-communication routes - Google Patents

Abstract

A multi-path communication system having multiple communication paths is provided to collect lossless data through duplication of more than 2 communication paths from a dedicated controller, and to forcibly convert supply power of the controller into a battery operation mode in case of dropping, thereby minimizing damage to a device. An I/O interface circuit(18) transceives signals with an embedded main board(11). An interception and recovery unit(26) intercepts and recovers communication lines and AC(Alternating Current) power supplied to a general controller(25) or PLC(Programmable Logic Controller) by using a relay output channel(19) for relay on/off and a digital input channel(20) provided by a multi-path communication system(10). An interception and recovery unit(27) intercepts and recovers battery power.

Description

Multi-routes communication system with multi-communication routes

1 is a hardware configuration diagram of a multipath communication system according to the present invention.

2 is a software module configuration diagram of a multipath communication system according to the present invention.

3 is a communication redundancy procedure of the multipath communication system according to the present invention.

4 is an example of connection between multiple communication systems according to the present invention.

5 is an example of a multipath communication system and a computer connection according to the present invention.

<Short description of drawing number>

10: Multipath Communication System 11: Embedded Main Board

12: Serial module (for CDMA) 13: Serial module (for TRS)

14: Serial module (dedicated line) 15: LAN port (for xDSL)

16: LAN port 17: serial module

18: I / O Interface 19: Relay Output Channel

20: Digital Input Channel 21: CDMA

22: TRS 23: leased line

24: xDSL 25: PLC or Controller

26: power supply and communication line 27: battery power

31: COM / DCOM component or daemon application

32: lightning protection module 33: protocol converter

34: communication redundancy module 35: PLC or controller

36: CDMA modem drive 37: dedicated line modem drive

38: TRS Modem Drive 39: xDSL Modem Drive

40: Windows or Embedded Linux Software

50, 51: multipath communication system 52, 53: PLC or controller

54, 55: Serial communication (RS-232C, RS-422, RS-485)

56, 57: battery 58, 59: AC power

60, 61: AC power off and recovery 62, 63: Battery off and recovery

64, 65: CDMA 66, 67: TRS

68, 69: leased line 70, 71: xDSL

75: integrated control system

The present invention collects lossless data through redundancy of two or more communication paths from a general-purpose controller such as a PLC remotely located from an integrated monitoring system or a multi-path communication system or a dedicated controller for controlling specific equipment, and provides power supply to the controller during a lightning strike. The present invention relates to a multipath communication system having a redundant communication path having a reliability and stability forcibly switching to a battery operation mode to minimize damage to a device.

In the related art, a communication redundancy component of a PLC or a general controller itself is implemented, but this is limited to a communication redundancy function that supports short-range communication such as a LAN or serial communication. It is not suitable for the communication redundancy function using xDSL, CDMA communication, TRS communication, etc., and power and communication line control device for preventing lightning damage of PLC or general controller far away from the integrated monitoring system is not developed as a product. There is a problem to design and build separately for each system.

The technical problem to be achieved by the present invention is to solve the problem of the prior art and to solve it, various communication equipment such as leased line, CDMA, TRS, xDSL using a server equipped with hardware and software for multiple communication To establish communication redundancy between multipath communication systems and to forcibly switch from wired power supply to battery power to prevent lightning damage, and to duplicate communication paths by wired and / or wireless in case of communication failure The purpose is to secure the reliability and stability of the system through the stable and continuous data collection by implementing a multipath communication system with a means to prevent data loss by switching the switch.

It is still another object of the present invention to construct a multipath communication system with a redundant path in order to facilitate the integration of heterogeneous PLCs or controllers into a single system. By implementing the user-defined protocol function, it is possible to convert the general-purpose protocol into the user-defined protocol and use it conveniently.

The present invention collects data without loss through duplication of two or more communication paths from a general-purpose controller such as a PLC remotely located from a multipath communication system or an integrated control system or a dedicated controller for controlling specific equipment, and supplies power to the controller during a lightning strike. The present invention relates to a multipath communication system having a redundant communication path with reliability and stability, which is forcibly switched to a battery operation mode to minimize damage to a device.

Hereinafter, with reference to the accompanying drawings illustrating the configuration and operation of the embodiment of the present invention, the configuration and operation of the present invention shown and described in the drawings will be described as at least one or more embodiments, whereby the present invention described above The technical idea and its core composition and operation are not limited.

With reference to the drawings shown to facilitate understanding of the present invention. 1 shows a hardware configuration diagram of a multipath communication system according to the present invention, and FIG. 2 shows a software module configuration diagram of a multipath communication system according to the present invention. 3 is a flowchart illustrating communication redundancy according to the present invention, and FIG. 4 illustrates an example of connection between a multipath communication system according to the present invention. Figure 5 shows an example of the connection between the multi-path communication system and the integrated monitoring server according to the present invention.

The present invention provides loss-free data through two or more communication paths from a general-purpose controller such as a PLC installed in a mountain or remote control device located remotely from an integrated control system or a multipath communication system or a dedicated controller for controlling specific equipment. It collects and forcibly switches the controller's supply to battery-operated mode during lightning strikes, providing a redundant multipath communication system with reliability and stability that minimizes device damage. It looks at a specific embodiment according to the present invention.

EXAMPLES

A specific embodiment according to the present invention will be described with reference to the drawings. The present invention provides loss-free data through two or more communication paths from a general-purpose controller such as a PLC installed in a mountain or remote control device located remotely from an integrated control system or a multipath communication system or a dedicated controller for controlling specific equipment. It is a multi-path communication system 10 to improve the reliability and stability of the communication and the device by collecting and configured to forcibly switch the power supply of the controller to the battery operation mode during lightning.

In the multipath communication system according to the present invention, as shown in FIG. 1, the dedicated line 23 is connected to the dedicated line modem using the serial module 14 and the UART, and the xDSL 24 uses the LAN port 15 to connect the xDSL modem. CDMA 21 is connected to a CDMA modem using a serial module (12, UART, Serial Module), TRS (22) is connected to a serial module (13, UART, Serial Module) Connected to the TRS modem.

In connection with the PLC or the general controller 25 in FIG. 1, the connection is performed through Ethernet using the LAN port 16 or RS-232C, RS- which is commercially available using a serial module (17, UART, Serial Module). It is connected via 422 and / or RS-485.

As shown in FIG. 1, the present invention includes an I / O interface circuit 18 for exchanging a signal with an embedded main board 11 to provide a lightning damage prevention function, and is provided in a multipath communication system 10. Blocking and restoring AC power and communication lines supplied to the PLC or the general controller 25 by using the digital input channel 20 and the relay output channel 19 for relay on / off. 26) means for disconnecting and restoring battery power, and for disconnecting and restoring AC power and battery power supplied to a communication equipment having a PLC or general controller 25, and for disconnecting and restoring a wired communication line. It is configured to perform a function to minimize lightning damage prevention through.

Figure 2 shows the configuration of the software embedded in the multipath communication system (50, 51 of Figure 4) designed and manufactured in accordance with the present invention. The multipath communication system (50, 51 of FIG. 4) or the integrated control system (75 of FIG. 5) has a built-in Windows or embedded Linux software 40, between the multipath communication system (50, 51 of FIG. 4) or In order to transmit data without loss of data between the integrated control system (75 of FIG. 5), a software capable of performing the communication redundancy module 34, the protocol conversion module 33, and the lightning damage prevention control module 32 is incorporated.

On the memory of the multipath communication system or integrated control system, a built-in software for driving a PLC or a general controller device embedded in a control device located in a deep mountain or remote area, and when trying to perform a communication redundancy function in a general computer, It is equipped with software to drive modem drives such as dedicated line 37, CDMA 36, TRS 38 and xDSL 39 of a multipath communication system or integrated control system, and can be connected and operated with various communication devices. It is configured to.

Based on the flow chart in Figure 3 looks at the communication status determination criteria for the communication redundancy of the multipath communication system according to the present invention. First, in the case of the active state, a means for periodically checking and determining whether or not communication data is being received smoothly is provided, and periodically sends and receives whether normal data is transmitted or received within a predetermined period. The checksum check on the received data determines whether there is an error of data and / or whether normal communication is being performed. At this time, when an error occurs continuously N or more times for a predetermined time set in a memory in an integrated control system or a multipath communication system, communication is performed through a backup wired line according to communication duplication set according to the present invention.

When the redundant communication according to the present invention is a wireless communication, as a means for determining whether there is an error or normal communication of the transmission data, in addition to the success of data reception, the reception sensitivity of the radio wave is checked so that the intensity of the radio wave is below a predetermined standard. When down and maintained for a certain period of time, it is configured to automatically switch to backup communication installed by communication redundancy to perform data communication.

The following is an example of an inactive state. After sending Hello Packet to the other party at regular intervals, it receives a response packet and checks whether data transmission is normal.

In case of wireless communication, check the reception sensitivity of radio wave, and if the strength of radio wave is more than a certain standard, send Hello packet to the other side, and if the other party receives the response packet normally, the data communication status is normal. I judge that I am losing.

In the case of the main communication line, the Hello packet is periodically transmitted in the inactive state to check whether the communication state is normally performed, and automatically in the active state when the communication is normally performed. It is configured to make a switch.

Next, a lightning damage prevention function and means in a redundant multipath communication system according to the present invention will be described. When lightning damage is expected, the relay is controlled through the relay output channel 19 for relay on / off of the AC power connected to the PLC or the general controller 25 as shown in FIG. 1 by remote control. By forcibly cutting off the AC power, it converts the power of PLC or general controller into battery power and operates so that the signal is connected in parallel for a predetermined time even when switching.

In addition, the communication path for sending and receiving data is forced to switch to wireless communication, not wired, to prevent the overcurrent caused by lightning through the wired line, and by forcibly cutting off the AC power supplied to the wired communication equipment and supplying it to the battery It is designed to protect the PLC or general controller embedded in remotely installed control devices from lightning strike by blocking the incoming route as much as possible in advance.

The driving procedure of the present invention for preventing the lightning damage is a) by supplying a pulse output to the relay AC power connected to a PLC or a general controller to cut off the AC power, using a digital input port to input the digital pulse signal battery power Switch to operate. b) Forcibly switch the communication path for data transmission and reception to wireless communication. c) Forcibly cut off the power supplied to the wired communication equipment. d) Forcibly cut off the communication line of data transmitted by wire.

Looking at the lightning protection prevention procedure according to the present invention, a) release the blocking of the communication line of the data transmitted by wire. b) Power the wired communication equipment. c) A microprocessor embedded in an integrated control system and / or a multipath communication system interoperates with a program to operate a relay to convert AC power supplied to a PLC or a general controller into battery power. d) Switch communication path to main communication path set in memory. e) Periodically check the status of the battery and request the server to check the status of the multipath communication system in the case of low voltage status and automatically switch to AC power if there is no status keep command.

When switching the switch, it is preferable to configure parallel communication for a predetermined short time in order to prevent disconnection of power or signal.

Lightning damage prevention in a redundant multipath communication system can be achieved manually and automatically (reservation). First, consider the manual case. Manual actuation allows an administrator to issue actuation commands to a multipath communication system either directly or through communications. In the connection between the multipath communication system and the multipath communication system, the administrator can transmit a driving command to the multipath communication system through the multi-communication S / W of the integrated control system or the multipath communication system. At this time, the multipath communication system received the command is immediately switched to the lightning damage prevention procedure mode. In the connection between the multipath communication systems in FIG. 4, when the administrator transmits a driving command to a device of one side, the device receiving the command transfers this command to the device of the other side, and then switches to a lightning damage prevention procedure mode. The other device also switches to the corresponding mode as soon as it receives a drive command. Lightning damage prevention is also performed through the same procedure as in the above drive sequence to release from the manual mode.

Next, let's take a look at automatic (reserved) operation. When an administrator reserves the time to start and release the time to prevent lightning damage in the integrated control system or multi-path communication system with built-in multi-communication software, it automatically executes the procedure when the scheduled time comes. It is configured to provide functionality.

Figure 5 collects data without loss between the integrated control system (computer) and the multipath communication system, and forcibly switches the controller's power supply to the battery operation mode during lightning strikes, thereby minimizing damage to the device and providing reliability and stability. The configuration having a redundant communication path is the same as in all configurations and functions for communication and lightning protection between the multipath communication systems.

In the multipath communication system or integrated control system according to the present invention, an embedded Linux software is embedded as an operation program, and an interface is a daemon application program, and a network interface is composed of a dedicated line, CDMA, TRS, and xDSL. The network interface consists of four channels.

A general computer capable of communicating with the multipath communication system or integrated control system is an operating program, and software such as Windows 2000, Windows XP, and Windows 2003 server is embedded, and the interface is a COM / DCOM component and a network interface. Is composed of leased line, CDMA, TRS and xDSL, and network interface is composed of 4 channels.

The multipath communication system according to the present invention is an integrated control system and a multipath communication system, which protects a control device or an electronic device that is used for observing or used for various purposes from a distance and protects against lightning damage, and uses industrially as it can transmit data without loss. It is very likely.

The present invention connects various communication equipment such as leased line, CDMA, TRS, xDSL using integrated control system or multi-path communication system with built-in multi-communication software to configure communication redundancy between multi-path communication systems and prevent lightning damage. It is equipped with a means to forcibly switch from wired power supply to battery power for the purpose, and the means to prevent data loss by switching the switch in the event of a communication failure by redundancy of communication paths by wire and wireless. Collecting has the effect of securing the reliability and stability of the integrated surveillance system.

Another effect of the present invention is to construct a redundant integrated control system or a multipath communication system in hardware and software to enable conversion between general purpose protocols to facilitate the integration of heterogeneous PLCs or controllers into a single system. By implementing user-defined protocol function, it converts general-purpose protocol into user-defined protocol and connects it for convenient use.

Claims (5)

In a multipath communication system having a redundant communication path, A memory for storing software for smoothly operating the system, A microprocessor for executing software embedded in the memory; Means for checking the checksum of the transmission and reception data to prevent data loss and periodically checking whether the transmission and reception of the data is normally performed, and switching the line in case of failure. Installed on one side of the system, to protect the control equipment from lightning strike by forcibly cutting off the AC power supplied to the control equipment, the means for supplying battery power and the means for restoring to AC power, A multipath communication system having a redundant communication path installed on one side of the system and having a means for transmitting data wirelessly to block or restore a data line transmitted by wire to protect the control equipment from lightning. In a multipath communication system having a redundant communication path, A memory for storing software for smoothly operating the system, A microprocessor for executing software embedded in the memory; In case of wireless communication, it checks the reception sensitivity of radio wave to prevent data loss and judges whether or not it operates normally when the reception sensitivity of radio wave is over a certain standard. Means for changing the data transmission path to Installed on one side of the system, to protect the control equipment from lightning strike by forcibly cutting off the AC power supplied to the control equipment, the means for supplying battery power and the means for restoring to AC power, A multipath communication system having a redundant communication path installed on one side of the system and having a means for transmitting data wirelessly to block or restore a data line transmitted by wire to protect the control equipment from lightning. The method according to claim 1 or 2, And a means for checking whether the battery power is normal. The method according to claim 1 or 2, A multi-path communication system configured to switch the communication line and switch from AC power to battery power in order to protect the control device from lightning strikes. The method according to claim 2, The wireless communication means is a multipath communication system consisting of CDMA and TRS.

Images