KR100984147B1 - Measuring control system of apparatus measuring and remote control function - Google Patents

Abstract

PURPOSE: A motor control system is provided to minimize installation and maintenance costs by interlinking a main monitor device and a motor controller through two wired communications lines. CONSTITUTION: A first motor controller group(140) comprises a plurality of first motor controllers. A first communications converter(120) transmits the control and monitoring information of a plurality of first motor controllers to a main monitor device. A second motor controller group(150) comprises a plurality of second motor controllers. A second communications converter(130) transmits the control and monitoring information of a plurality of second motor controllers with to the main monitor device. The first or the second communications converter relays the communications between the first and the second motor controller group and the main monitor device with the switching of a communications bridge(160).

Description

Measuring Control System of Apparatus Measuring and Remote Control Function

The present invention relates to a motor control apparatus and method, and for the remote (far) function, even if the cable connecting the main monitoring apparatus and the motor controller is composed of only two strands of communication lines, the motor controller is sufficiently measured (instrumented), controlled and monitored. The operation status of many motors in the field can be measured, controlled and monitored remotely (far), and in addition, the system is doubled in preparation for errors in communication systems such as communication lines and communication converters. When one problem arises, the other system governs the entire system and relates to a motor control system and method that can be continuously monitored and controlled.

In general, the motor controller is attached to the start panel of the switchboard for supplying electricity and controls various motors and pumps. The motor controller can be easily used in any place that requires motor operation such as shipbuilding, power generation, plant, steel, petrochemical, etc. It is a complex, high-performance product made for use. These motor controllers adopt standardized circuits satisfying various international standards, and are sold in individual unit units by modularizing basic and application functions. Modular motor controllers have improved control circuit reliability and assembly accuracy compared to integrated motor controllers, and most companies do this because of their appearance and size, as well as their ability to reduce panel assembly time and provide fast and economical maintenance. Is adopted. Modular motor controllers vary depending on the auxiliary equipment connected to each and the application system.

These modular motor controllers include sequential start, alarm output, forward / reverse direct start, heater control, automatic / manual switching, remote / local switching, YD (star-delta) starting, It has control functions such as 2 speed forward / reverse rotation operation and 2 or 3 Stand-by Start.

To date, all motor controllers are local controllers, and in order to grasp the start, stop, and various alarm states of the motor, the operator needs to go out to the site, perform necessary operations, and check with the naked eye. In addition, although the existing motor controller may have a remote (far) function, it is not through remote (far) control by communication, but is made through a separate relay contact to inform various alarms or operating states. More than 20 cables are required. In a small number of motor controllers used in small ships or the like, the remote (far) function is often not used. However, in the case of a large ship or a special ship, a motor controller having a 100% remote (far) function is used. In general, a maximum of 60 motor controllers should be installed in the case of merchant ships, and a maximum of 200 cables will be required for special ships such as drill-ships, and more than 4,000 cables are required. Therefore, Drill-Ship uses expensive PLC (Power Line Communication) for remote (distant) control. In this case, PLC is a foreign product, which is a huge additional cost from design, installation, commissioning and maintenance. Is generated. This cost, of course, flows abroad. Although the motor controller is localized, the equipment for managing the motor controller pays a higher management cost than the argument cost by introducing foreign equipment.

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to sufficiently measure a motor controller even if the cable connecting the main monitoring device and the motor controller is composed of only two strands of communication lines for a remote (far) function. The present invention provides a motor control system and method that can measure, control and monitor the operation status of many motors in the field by remote control (control) and control.

In addition, the system is redundant in preparation for errors in communication systems such as communication lines and communication converters, and when one of the two systems fails through the communication bridge, the other system manages the entire system to continuously monitor and control the motor. It is to provide a control system and method.

First, to summarize the features of the present invention, a motor control system according to an aspect of the present invention, the first motor controller group including a first plurality of motor controllers for controlling a plurality of motors, respectively; Relays communication on a first system between the main monitoring device and the first motor controller group, and transmits a control command of the main monitoring device to a corresponding motor controller of the first plurality of motor controllers; A first communication converter for transmitting control and monitoring related information received from each of the motor controllers to the main monitoring apparatus; A second motor controller group including a second plurality of motor controllers respectively controlling a plurality of different motors; Relaying communication on a second system between the main monitoring device and the second motor controller group, and transmitting a control command of the main monitoring device to a corresponding motor controller of the second plurality of motor controllers; A second communication converter configured to transmit control and monitoring related information received from each of the motor controllers of the main monitoring device; And confirming an error in the first system or the second system, such that the corresponding communication converter on the system without errors relays communication between both the first motor controller group and the second motor controller group and the main monitoring device. Communication bridge to switch to.

The first communication converter and the second communication converter in parallel with each of the motor controllers in the motor controller group to receive the control and monitoring related information from each of the motor controllers on the system and transmit them to the main monitoring device. It is connected, and the neighboring motor controllers may be connected to each other in a ring manner through a predetermined connector module.

Each of the corresponding motor controllers in the first motor controller group and the second motor controller group may transmit motor status information, motor controller status information, or an alarm for the motor or motor controller as the control and monitoring related information to the corresponding communication converter. Can transmit

The motor state information includes an operation state indicating the start or stop of the motor, a current amount of the motor, or a start time of the motor, and the motor controller state information includes whether the power supplied to the motor controller is normally supplied or the corresponding motor. Information on whether the control means in the controller is operating normally, the alarm includes a failure of the power supplied to the motor controller, a failure of the control means in the motor controller, motor overload, motor pressure drop, normal stop of the motor It includes alarm information about the stop without a control command or the change of the control right to another communication converter according to the operation of the communication bridge.

The first communication converter may include: a first state storage unit configured to store motor state information and motor controller state information for sequentially scanning and collecting motor controllers on the first system; And a first backup storage unit configured to store motor state information and motor controller state information from motor controllers on the second system transmitted by the second communication converter, wherein the second communication converter comprises: A second state storage unit configured to store motor state information and motor controller state information for sequentially scanning and collecting motor controllers; And a second backup storage unit storing motor state information and motor controller state information from motor controllers on the first system transmitted by the first communication converter.

In the absence of the error, the first communication converter transmits motor state information and motor controller state information stored in the first state storage unit to the main monitoring device periodically or in response to a request of the main monitoring device. The second communication converter may transmit motor state information and motor controller state information stored in the second state storage unit to the main monitoring device periodically or in response to a request of the main monitoring device.

When the error occurs in the first system, according to the switching of the communication bridge, the second communication converter replaces the operation of the first communication converter and the motor state information and motor controller state stored in the second backup storage unit. Based on the information, the communication is successively relayed on the first system, and when the error occurs in the second system, the switching of the communication bridge causes the first communication converter to replace the operation of the second communication converter. Based on the motor state information and the motor controller state information stored in the first backup storage unit, communication may be successively relayed on the second system.

The communication bridge may determine the error from a signal for an operation failure of the first communication converter or the second communication converter, or a communication failure of the first communication converter or the second communication converter with the main monitoring device. Can be.

Each of the corresponding motor controllers in the first motor controller group and the second motor controller group includes a communication interface for communicating with a communication converter on a corresponding system; A control unit controlling a corresponding motor according to the control command; And a memory for storing the control and monitoring related information, wherein the control unit transmits the control and monitoring related information to the communication converter or the main monitoring device on the system periodically or in response to a request from the main monitoring device. Can be.

Each of the corresponding motor controllers in the first motor controller group and the second motor controller group further includes a manual input / output unit configured to generate a control command signal related to starting or stopping of the motor according to an input of a key or a button.

The communication interface includes a plurality of communication transceivers that communicate with a communication converter on a corresponding system, and communicates with a communication converter using one of the plurality of communication transceivers under a control of a channel selecting means, or a daisy chain method. Based on the above, two of the plurality of communication transceivers may be serially connected to amplify the input and output signals transmitted and received with the communication converter.

The communication interface may include an error processing unit for disconnecting a connection from the network to a communication converter of the plurality of communication transceivers under a control of the control unit in an abnormal operation including a poor power supply or a bad operation of the control unit. do.

In addition, in a motor control method for controlling and monitoring a motor in a main monitoring device through remote (distant) communication according to another aspect of the present invention, the main monitoring device relays communication of a first communication converter on a first system. Collects control and monitoring related information about the motors or the first plurality of motor controllers controlled by the first plurality of motor controllers included in the first motor controller group through the control of the second communication converter on the second system. Collects control and monitoring-related information about the motors or the second plurality of motor controllers controlled by the second plurality of motor controllers included in the second motor controller group through a communication relay, and the main monitoring device and the first 1 checking an error on a first system between the motor controller groups or an error on a second system between the main monitoring device and the second motor controller group; And switching the corresponding communication converter on the error free system to relay communication between both the first motor controller group and the second motor controller group and the main monitoring device.

According to the motor control system and method according to the present invention, a remote (distant) support using a communication controller that manages information and data flows between a motor controller equipped with a communication interface, a plurality of lower motor controllers, and an upper main monitoring device. The monitoring device monitors the control of alarms such as starting and stopping of motors and alarm status and centralizes the information by quickly computerizing information.

In addition, according to the motor control system and method according to the present invention, it is possible to replace expensive foreign PLC by applying a customized system for remote (far) control of the motor, it is possible to replace the thousands of conventional control and monitoring cable of two strands of communication lines Since it can be built only by itself, there is an effect that can minimize the installation and maintenance costs.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the configuration of the present invention.

1 is a view for explaining a motor control system 10 according to an embodiment of the present invention.

Referring to Figure 1, the motor control system 10 according to an embodiment of the present invention, the periphery market value 110, the first communication converter 120, the second communication converter 130, the first motor controller group 140, a second motor controller group 140, and a communication bridge 160. Each motor controller 170 of the plurality of motor controllers # 1 to #M and # M + 1 to #N included in each of the motor controller groups 140 and 150 is in charge of controlling one motor or pump. do. Here, although the motor controller groups 140 and 150 and the communication converters 120 and 130 corresponding thereto are illustrated as two examples, the motor controller groups 140 and 150 are not limited thereto. Accordingly, when more motor controllers are to be operated, a communication converter for grouping a certain number of motor controllers to control the corresponding motor controller group may be further included.

In FIG. 5, each communication interface 180 of the motor controllers 170 included in the first motor controller group 140 is used by the first communication converter 120 with a minimum communication line, for example, a 2-strand communication line. And connected in parallel to each other in a ring manner, the connection cable 190 between the motor controllers 170 and the first communication converter 120 included in the first motor controller group 140 is partially separated. Even if the wire is disconnected, communication can be made through another path. Similarly, each communication interface of the motor controllers included in the second motor controller group 540 may be connected in parallel with the second communication converter 130 using a minimum communication line, for example, two strand communication lines. By connecting in such a manner, even if the connection cable between the motor controllers included in the second motor controller group 150 and the second communication converter 130 is disconnected in some section, communication may be performed through another path.

The first communication converter 120 and the second communication converter 130 are connected to each other by using a main communication device 110 of a remote (distant) place and a minimum communication line, for example, two-strand communication lines, to communicate with each other. , RS485 serial communication method and the like, the other communication line between the first communication converter 120 and the second communication converter 130, for example, two-wire communication line can be used to connect and communicate with each other. have.

In the motor control system 10 according to an embodiment of the present invention, in the normal operation, the first communication converter 120 communicates with each motor controller in the first motor controller group 140 to communicate with the main monitoring device 110. The communication is relayed, and the second communication converter 130 communicates with each motor controller in the second motor controller group 150 to relay communication with the main monitoring device 110, and the first communication converter 120 or the second If an error occurs in the communication system through the communication converter 130, the communication is not redundant according to the switching of the communication bridge 160 to operate the redundant system to manage the system.

For example, the communication bridge 160 is an error in the system managed by the first communication converter 120, that is, an error of the first communication converter 120 itself, or the first communication converter 120 and the main monitoring device. In case of confirming a communication failure due to disconnection between the 110 and the like, the second communication converter 130 not only communicates with each motor controller in the second motor controller group 150 but also replaces the first communication converter 120. The first motor controller group 140 may also communicate with each motor controller in the first motor controller group 140. The error of the first communication converter 120 itself is due to abnormal operation of the first communication converter 120 such as motor state information received from each motor controller in the motor controller group 140 or a poor collection of motor controller state information. This may be an error. The signal for the failure for determining the error may be notified by the first communication converter 120 to the communication bridge (160).

Similarly, the communication bridge 160 is an error in the system managed by the second communication converter 130, that is, an error of the second communication converter 130 itself, or the second communication converter 130 and the main monitoring device 110. In the case where it is determined that there is an error by judging from a signal for communication failure due to disconnection between the first and the like, the first communication converter 120 not only communicates with each motor controller in the first motor controller group 140 but also the second. In place of the communication converter 130, it may be operable to communicate with each motor controller in the second motor controller group 150. The error of the second communication converter 130 itself may be caused by abnormal operation of the second communication converter 130 such as motor state information received from each motor controller in the motor controller group 140 or poor collection of motor controller state information. May be an error. The signal for the failure for determining the error may be notified by the second communication converter 130 to the communication bridge 160.

Each communication converter 120/130 may be configured as shown in FIG. 2 for the duplication operation of the first communication converter 120 and the second communication converter 130.

Referring to FIG. 2, the communication converter 20 according to an embodiment of the present invention may include a communication unit 210, a state storage unit 220, and a backup storage unit 230.

The communication unit 210 may communicate with the main monitoring unit 110 and other communication converters adjacent to each other by using a minimum communication line, for example, two strand communication lines, and a motor controller group of a system that is managed by the main monitoring unit 110 ( Each motor controller included in the 140/150 may also be connected to each other by using a minimum communication line, for example, two-wire communication lines. Herein, a variety of communication methods such as RS485 serial communication method may be used.

Through the relay of the communication unit 210 as described above, the state storage unit 220 stores the motor state information received from each motor controller included in the motor controller group (for example, 140) of the system that it manages. The controller state storage unit 222 may store and collect the motor controller state information received from each motor controller included in the motor controller group (for example, 140) of the system that is managed by the controller 221. Can be stored and collected. Here, the motor controller status information may include whether the power supplied to each motor controller included in the motor controller group (for example, 140) is normally supplied, and whether the control means (for example, a microprocessor) in each motor controller is normally operated. Information may be provided. As such, the motor state information and the controller state information updated in the state storage unit 220 by each motor controller included in the motor controller group (for example, 140) may be periodically or requested by the main monitoring device 110. The main monitoring device 110 may be notified every time.

 Through the relay of the communication unit 210 as described above, the backup storage unit 230 is prepared in case of an error in the system managed by another neighboring communication converter (for example, 130), other communication converter (for example, Motor state information received from each motor controller included in the motor controller group (eg, 150) of the system managed by 130 may be stored and collected in the motor state storage unit 231, and may be collected by another communication converter (eg, For example, 130 may store and collect motor controller state information received from each motor controller included in a motor controller group (eg, 150) of a system managed by the controller in the controller state storage unit 232. Here, the motor controller status information may include whether the power supplied to each motor controller included in the motor controller group (for example, 150) is normally supplied, and whether the control means (for example, a microprocessor) in each motor controller is normally operated. Information may be provided.

As such, the communication converter 20 not only collects motor state information and motor controller state information in a system that is managed by itself, but also collects motor state information and motor controller state information received from other communication converters on a neighboring system. Thus, in case of an error on the communication system through the first communication converter 120 or the second communication converter 130, when the communication bridge 160 operates to switch to replace the corresponding communication converter on the faulty system, Each motor controller present on the communication converter system can be monitored and controlled smoothly from the previous state.

For example, in FIG. 1, when the motor monitoring (or stopping) transmits a control command for starting (or stopping) a motor input by the user through the user interface, the main monitoring device 110 may transmit a corresponding communication converter (eg, For example, 120 may interpret this information and transmit the same to the corresponding motor controller (eg, 170) through the communication interface (eg, 180). Accordingly, the corresponding motor controller (eg, 170) may It is possible to start (or stop) the motor by generating a signal for starting (or stopping) the motor under control. The event control command such as start or stop in the main monitoring device 110 may be immediately transmitted to the corresponding motor.

Accordingly, while the motor is in operation, the motor controller (for example, 170) periodically checks the motor state information (for example, the operation state indicating the start or stop of the motor, the amount of current in the motor, the start time of the motor, etc.). When the communication converter (eg, 120) is called, the latest updated motor state information is transmitted through the communication interface (eg, 180). 120). Normally, the communication converter (for example, 120) sequentially scans all motor controllers included in the motor controller group (for example, 140) that is managed in its own system, so that each motor state information and motor controller state are scanned. The information is updated and stored in the state storage unit 220, and may be notified to the main monitoring device 110 periodically or whenever the main monitoring device 110 requests it.

At this time, the neighbor communication converter (for example, 130) sequentially scans all the motor controllers included in the motor controller group (for example, 150) managed in its own system, so that each motor state information and motor The controller state information may be updated and stored in its own state storage unit 220, and at the same time, the motor state information and the motor controller state information stored and managed by the neighbor communication converter (eg, 130) may be stored in the communication converter (eg, 120). Can be notified. Accordingly, the communication converter (eg, 120) stores and manages the motor state information and the motor controller state information received from the neighbor communication converter (eg, 130) in the backup storage unit 230, thereby communicating the communication bridge 160. ) May be operated to replace a neighbor communication converter (eg, 130). Similarly, the backup storage unit 230 of the communication converter (eg, 130) stores and manages motor state information and motor controller state information received from the neighbor communication converter (eg, 120), thereby communicating the communication bridge 160. May be operated to replace a neighbor communication converter (eg, 120).

For example, due to an error in the system of the neighbor communication converter (eg, 130), the first communication converter 120 may control each motor controller in the first motor controller group 140 according to the switching of the communication bridge 160. In addition to controlling, each motor controller in the second motor controller group 150 may also be controlled in place of the second communication converter 130. In this case, the first communication converter 120 sequentially scans all the motor controllers included in the motor controller group (for example, 140) and stores the respective motor state information and the motor controller state information in the state storage unit. The controller 220 may update and store all the motor controllers included in the motor controller group (for example, 150) in order to update and store the motor state information and the motor controller state information in its own backup storage unit 220. 220 may be updated and stored, and thus, when all the motor state information and the motor controller state information updated in the state storage unit 220 and the backup storage unit 220 are periodically or at the request of the main monitoring apparatus 110. The main monitoring device 110 can be notified every time. As described above, the period in which the first communication converter 120 notifies the main monitoring device 110 of the motor status information and the motor controller status information may be, for example, within 3 seconds.

On the other hand, as shown in Figure 3, through the user interface of the main monitoring device 110, each device such as the main monitoring device, communication converter, motor controller, motor, etc. constituting the motor control system 10 can be displayed through the main screen. have. In this main screen, the user can input the start or stop command of the motor by clicking the motor controller by using the mouse. At this time, the color of the motor changes to green or red so that the motor can be actually started or stopped. Can be. At this time, if an error such as disconnection occurs in the communication line on the communication system, the corresponding communication line may blink to indicate that there is a communication error. In addition, in the main monitoring device 110, motor state information transmitted from the communication converters 120 and 130 (for example, an operation state indicating start or stop, current amount of motor, start time of the motor, etc.) and motor controller state. Information (e.g., whether or not power supply to each motor controller is normally supplied, whether control means (e.g., microprocessor) in each motor controller is operating normally), alarms for motors or motor controllers, etc. The control and monitor related information may be collected and stored in a predetermined storage means in real time, and may be checked through a predetermined menu of the main screen as described above. In addition, all the information managed by the main monitoring device 110 from anywhere through a variety of communication media connected to the main monitoring device 110 and a network (for example, a wired / wireless dedicated LAN or a communication network such as the Internet). You can check it.

4 is a detailed block diagram of the motor controller 30 according to an embodiment of the present invention.

4, the motor controller 30 according to an embodiment of the present invention includes a control unit 310, a memory 311, a display unit 312, a communication interface 320, a manual input / output unit 321, and a terminal block. 330, a flexible cable 331, an extension connector module 340, a converter 350, and an analog-to-digital converter 351.

The configuration of the communication interface 320 is shown in FIG. Referring to FIG. 5, the communication interface 320 according to an embodiment of the present invention includes an error processor 321, a channel selector 322, and a plurality of communication transceivers 323 and 324.

In general, when a motor controller is attached to a door of a predetermined fixed panel panel, about 20 strands of hard cables start from the front panel and go out along the body. In this case, problems such as poor door closing as well as the wiring maneuver of the field worker may occur.

In the present invention, as shown in the perspective view of Figure 6, to be connected to the terminal block 330 through the flexible cable 331 between the motor controller 30 and the panel body using an expansion connector module (see 340 in Figure 4) inside the panel. By doing so, the internal wiring of the panel was made possible by a simple attachment operation. The terminal block 330 and the expansion connector module 340 are connected by the flexible cable 331, and the expansion connector module 340 is connected to another motor controller for communicating with the communication converter 120/130. This may be inserted in the form of a predetermined connector. In addition, the cable of the converter 350 that converts a motor current value of 4-20 mA at a time of starting the motor into a voltage may be connected to the A / D converter 351 through the terminal block 330 through the expansion connector module 340. Alternatively, the cable of the converter 350 may be directly connected to the A / D converter 351 through a predetermined terminal block 330 on the rear side of the motor controller 30. The A / D converter 351 converts the voltage from the converter 350 into a digital signal and transmits the converted digital signal to the controller 310. The communication interface 320 connected through the terminal block 330 connects the communication converter 120/130 and the control unit 310 to receive and receive necessary communication signals from each other. The controller 310 corresponds to a control means such as a microprocessor that is responsible for the overall control of the components of the motor controller 30.

On the front of the motor controller 30, various keys (or buttons) for manual control and various motor state information collected by the controller 310 (for example, an operating state indicating start or stop, an amount of current of the motor, and starting of the motor). Control and monitoring related information such as time), motor controller status information (e.g., whether or not power supply to the motor controller is normally supplied, whether the control means 310 in the motor controller is normally operating), or alarm A display unit 312 including a light emitting diode (LED) for display and a flexible numeric display (FND) display means is included.

According to a control command related to the start / stop of the motor transmitted from the main monitoring device 110, the control unit 310 starts / stops the corresponding motor controlled by the main monitoring device 110, and the converter 350 and the A / D converter 351. The current amount of the motor consumed by the motor can be received and periodically updated and stored in the memory 311. The start time of the motor is also periodically measured and measured in the memory 311 based on a control command related to the start / stop of the motor. Updates can be saved. The amount of current of the motor consumed by the motor or the starting time of the motor may be displayed in the form of a number through the FND display means of the display unit 312. Accordingly, the motor controller 30 may directly or separately display the field. You can check the starting state of the motor without a current meter. You can see the total time the motor has been started without a separate time meter so that you can see the lifespan until the replacement.

In addition, the controller 310 collects motor controller state information (for example, whether the power supplied to the motor controller is normally supplied, whether the control means 310 is normally operated, etc.) in the memory 311, and displays the display unit. 312 may be displayed. As such, the control and monitoring related information about the motor or the motor controller, such as various motor state information, motor controller state information, or alarm, which the control unit 310 collects in the memory 311 is periodically communicated on the system. The converter 120/130 or the main monitoring device 110 may be notified, and the communication converter 120/130 may notify the main monitoring device 110 of the corresponding information. In some cases, in response to a request from the main monitoring device 110, the control unit 310 notifies control and monitoring related information to the communication converter 120/130 on the system or sends the information to the main monitoring device 110. You can also send it. Accordingly, various motor status information, motor controller status information, alarms, and the like may also be grasped through the main monitoring device 110 of a remote (distant) place.

Here, the alarm is different depending on the failure of the power supplied to the motor controller, the failure of the control means 310, the motor overload, the pressure drop of the motor used for the pump, the stop without the normal stop control command of the motor, the operation of the communication bridge It may be alarm information about the change of the control right to the communication converter. The alarm for the change of the control right to another communication converter according to the operation of the communication bridge makes it possible to determine whether the communication converter in charge of the control has failed when the control of the other communication converter is controlled by the switching of the communication bridge. .

Meanwhile, the motor controller 30 includes a manual input / output unit 321, and the manual input / output unit 321 controls the control contact signal, the alarm contact signal, the motor contact signal, and the heater according to the input of a key or a button of the display unit 312. It is possible to generate a control command signal associated with starting or stopping the motor such as a contact signal. When there is a heater around the motor or the motor according to the control contact signal, the heater 310 may be included, such that the controller 310 controls the supply of power to the motor or the heater. In addition, according to the alarm contact signal, the control unit 310 may notify the main monitoring device 110 through the communication converter as described above various alarms, the control unit 310 communicates whether the motor is started or not according to the motor contact signal The main monitoring apparatus 110 may be notified through the converter, and the control unit 310 may notify the main monitoring apparatus 110 whether the heater is activated or not through the communication converter according to the heater contact signal.

On the other hand, as the number of motors or motor controllers controlled by the motor controller groups 140 and 150 increases, so as to overcome signal attenuation generated in communication, as shown in FIG. 5, the communication transceiver of the communication interface 320. The fields 323 and 324 are redundant. According to the control signal of the channel selector 322, the communication transceivers 323 and 324 communicating with the communication converter are operated in a daisy chain manner, so that the communication transceivers 323 and 324 are connected in series. The signal exchanged with the communication converter can be amplified and input / output. For example, when the first communication transceiver 323 amplifies a signal received from the communication converter and transmits the signal to the second communication transceiver 324, the second communication transceiver 324 finally transmits the amplified signal to the controller 310. Also, when the second communication transceiver 324 amplifies the signal received from the control unit 310 and transmits the signal to the first communication transceiver 323, the first communication transceiver 323 finally communicates the amplified signal. Can be sent to the converter. In some cases, when the degree of signal attenuation is not large, the channel selector 322 selects one of the first communication transceiver 323 and the second communication transceiver 324 in accordance with a predetermined control signal to communicate with the communication converter. You can also send and receive signals. Here, as the communication method of the communication transceivers 323 and 324, various communication methods such as an RS232 serial communication method may be used.

In addition, when the motor controller 30 does not operate normally due to a failure of the motor controller 30 itself, for example, a failure of power supplied to the motor controller, a failure of the control means 310, the controller 310. ) Transmits a predetermined control signal to the error processing unit so that the error processing unit controls the channel selector 322 to disconnect the communication transceiver 323 and 324 from the network to prevent communication with the communication converter. By doing so, it can prevent a bad effect on the whole network.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

1 is a view for explaining a motor control system according to an embodiment of the present invention.

2 is a view for explaining the configuration of a communication converter according to an embodiment of the present invention.

3 is a view for explaining a main screen displayed on the main monitoring device according to an embodiment of the present invention.

4 is a detailed block diagram of a motor controller according to an embodiment of the present invention.

5 is a view for explaining a communication interface of the motor controller according to an embodiment of the present invention.

6 is a perspective view illustrating a form in which a motor controller and an extension connector module are connected through a flexible cable according to an embodiment of the present invention.

Claims (13)

A first motor controller group including a first plurality of motor controllers respectively controlling a plurality of motors; Relays communication on a first system between the main monitoring device and the first motor controller group, and transmits a control command of the main monitoring device to a corresponding motor controller of the first plurality of motor controllers; A first communication converter for transmitting control and monitoring related information received from each of the motor controllers to the main monitoring apparatus; A second motor controller group including a second plurality of motor controllers respectively controlling a plurality of different motors; Relaying communication on a second system between the main monitoring device and the second motor controller group, and transmitting a control command of the main monitoring device to a corresponding motor controller of the second plurality of motor controllers; A second communication converter configured to transmit control and monitoring related information received from each of the motor controllers of the main monitoring device; And Check the error in the first system or the second system, so that the corresponding communication converter on the error-free system relays communication between both the first motor controller group and the second motor controller group and the main monitoring device. Switching communication bridge Motor control system comprising a. The method of claim 1, wherein the first communication converter and the second communication converter, In order to receive control and monitoring related information from each of the motor controllers on the system and to transmit it to the main monitoring device, The motor is characterized in that it is connected in parallel with each of the communication converter and the motor controllers in the motor controller group in a ring manner, and the adjacent motor controllers are connected through a predetermined connector module to reduce shortages in the switchboard panel. Control system. The motor controller of claim 1, wherein each of the corresponding motor controllers in the first motor controller group and the second motor controller group includes: And motor status information, motor controller status information, or an alarm for the motor or motor controller as the control and monitoring related information to the corresponding communication converter. The method of claim 3, The motor state information includes an operation state indicating the start or stop of the motor, the amount of current in the motor, or the start time of the motor, The additional motor controller state information includes information on whether the power supplied to the motor controller is normally supplied or whether the control means in the motor controller are normally operated. The alarm may be caused by a failure of power supplied to a motor controller, a failure of a control means in a corresponding motor controller, a motor overload, a pressure drop of a motor, a stop without a normal stop control command of the motor, or other communication according to the operation of the communication bridge. A motor control system comprising alarm information on a change of control to the transducer. The method of claim 1, wherein the first communication converter, A first state storage unit for storing motor state information and motor controller state information for sequentially scanning and collecting motor controllers on the first system; And A first backup storage unit which stores motor state information and motor controller state information from motor controllers on the second system transmitted by the second communication converter, The second communication converter, A second state storage unit for storing motor state information and motor controller state information for sequentially scanning and collecting motor controllers on the second system; And A second backup storage unit for storing motor state information and motor controller state information from motor controllers on the first system transmitted by the first communication converter; Motor control system comprising a. The method of claim 5, If no occurrence of the above error occurs, The first communication converter transmits the motor state information and the motor controller state information stored in the first state storage unit to the main monitoring device periodically or in response to a request of the main monitoring device. And the second communication converter transmits motor state information and motor controller state information stored in the second state storage unit to the main monitoring device periodically or in response to a request of the main monitoring device. The method of claim 5, When the error occurs in the first system, according to the switching of the communication bridge, the second communication converter replaces the operation of the first communication converter and the motor state information and motor controller state stored in the second backup storage unit. Relays the communication successively on the first system based on the information, When the error occurs in the second system, according to the switching of the communication bridge, the first communication converter replaces the operation of the second communication converter and the motor state information and the motor controller state stored in the first backup storage unit. And relaying the communication successively on the second system based on the information. The method of claim 1, wherein the communication bridge, And determining the error from a signal for a failure of the operation of the first communication converter or the second communication converter or a communication failure of the first communication converter or the second communication converter with the main monitoring device. Control system. The motor controller of claim 1, wherein each of the corresponding motor controllers in the first motor controller group and the second motor controller group includes: A communication interface for communicating with a communication converter on the system; A control unit controlling a corresponding motor according to the control command; And A memory storing the control and monitoring related information; And the control unit periodically transmits the control and monitoring related information to a communication converter on the grid or the main monitoring device in response to a request from the main monitoring device. The motor controller of claim 9, wherein each of the corresponding motor controllers in the first motor controller group and the second motor controller group includes: Manual input / output unit that generates control command signal related to starting or stopping of motor according to key or button input Motor control system further comprises. The method of claim 9, wherein the communication interface, It includes a plurality of communication transceivers for sending and receiving signals with the communication converter on the system, Under the control of the channel selection means, one of the plurality of communication transceivers communicates with a communication converter, or a signal connected to and transmitted from a communication converter by serially connecting two of the plurality of communication transceivers based on a daisy chain method. Motor control system characterized in that the amplified and input and output. The method of claim 10, wherein the communication interface, And an error processing unit for disconnecting the connection of the plurality of communication transceivers from the network under a control of the controller in an abnormal operation including a failure of the supplied power or an operation failure of the controller. Motor control system. In the motor control method for controlling and monitoring the motor in the main monitoring device through remote (distant) communication, The supervisory market value is for controlling the motors or the first plurality of motor controllers controlled by the first plurality of motor controllers included in the first motor controller group through the communication relay of the first communication converter on the first system. And collecting the monitoring-related information, and controlling the motors or the second plurality of motor controllers controlled by the second plurality of motor controllers included in the second motor controller group through the communication relay of the second communication converter on the second system. Collect control and surveillance information Identifying an error on a first system between the main monitoring device and the first motor controller group or an error on a second system between the main monitoring device and the second motor controller group; And Switching the corresponding communication converter on the error-free system to relay communication between both the first motor controller group and the second motor controller group and the main monitoring device; Motor control method comprising a.

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