KR101738947B1 - plc system using wireless communication - Google Patents

plc system using wireless communication Download PDF

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Publication number
KR101738947B1
KR101738947B1 KR1020150059659A KR20150059659A KR101738947B1 KR 101738947 B1 KR101738947 B1 KR 101738947B1 KR 1020150059659 A KR1020150059659 A KR 1020150059659A KR 20150059659 A KR20150059659 A KR 20150059659A KR 101738947 B1 KR101738947 B1 KR 101738947B1
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South Korea
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communication
control unit
module
process control
communication device
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KR1020150059659A
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Korean (ko)
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KR20160128001A (en
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연영모
유동석
송승주
최성일
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(주)메티스
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
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Abstract

The present invention is not limited to the case where the data cable passing through the process enclosure is removed so that the wiring is simplified and the installation work is facilitated. When the communication device includes a plurality of communication modules and the main communication module does not operate normally, It is possible to increase the safety and reliability of the data communication and to determine whether the communication device operates normally or whether the auxiliary communication module operates by a simple design change and even if communication is not normally performed, The present invention relates to a PLC system using wireless communication that can maximize the process rate because it does not need to release the internal processing environment.

Description

The present invention relates to a PLC system using wireless communication,

The present invention relates to a PLC system using wireless communication, and more particularly, to a PLC system that performs processes without releasing a processing environment inside a processing zone, efficiently manages and controls the robot, And a PLC system using wireless communication capable of dramatically increasing reliability.

Typically, a PLC (Programmable Logic Controller) analyzes input / output contact data of each peripheral device (proximity sensor, temperature sensor, relay, motor, etc.) in the factory automation production system, It is the main controller that controls.

Recently, processing such as vacuum degree, gas concentration and temperature, such as maintaining a vacuum to keep the process space at a specific gas at an optimum concentration or blocking the contact of foreign substances contained in the air most completely or maintaining a specific temperature High-precision equipment that optimizes the environment and performs the process has increased rapidly.

1 is an exemplary diagram showing a PLC system of a conventional high precision facility.

1, a conventional PLC system 100 includes a process robot 131 and a process robot 131 installed in a process zone S forming an optimum processing environment suitable for a process, And a control unit 135 for controlling the process system 7 with a control instrument and a switch for controlling the process system S, and a control unit 135 installed outside the process zone S, And a data cable 105 connected between the control unit 135 and the PLC 101 to provide a data movement path between the PLC unit 101 and the PLC unit 101. [

The process system 101 includes processing environment actuators (not shown) such as a gas inlet, a pneumatic line, a heating and cooling means for forming a predetermined processing environment inside the processing zone S, And a sensor (not shown) for detecting the detection signal.

Since the control unit 135 installed in the process area S and the PLC device 101 installed outside the process area S are connected by the data cable 105, An installation hole 138 through which the data cable 105 passes is formed. At this time, a sealing operation for sealing the installation hole 138 must be performed in order to keep the internal space from the outside and maintain the optimum processing environment.

As described above, in the PLC system 100 of the conventional high-precision equipment, since the operation for installing the data cable 105 and the sealing operation for sealing the installation hole 138 in which the data cable 105 is installed must be performed, It has a complicated and complicated disadvantage.

Also, in case of the error in data transmission, the PLC system 100 of the conventional high-precision facility should move to the inside of the space area S to check the cable checking state, but the space area S), there is a releasing step of releasing the optimized processing environment, a checking step of inspecting the equipment by the manager entering the space area S after the releasing step, and the checking by the checking step It is necessary to proceed with the formation of the machining environment in which the inside of the space section S is formed into the predetermined machining environment again, so that the inspection and maintenance time is excessively increased and the process rate is lowered as the inspection and maintenance time is increased, The problem of lowering occurs.

Further, in the PLC system 100 of the conventional high-precision facility, if the data cable 105 is damaged such as short, the data cable 105 must be reinstalled. However, in order to reinstall the data cable 105, Disconnection of the installation hole 138 on the outer wall of the space section S after the release step is performed, the data cable 105 is removed, a wiring operation for reinstalling the new data cable is performed, Since the above-described machining environment forming step must be performed again after the sealing operation of the mounting hole 138 is performed, the equipment replacing operation is cumbersome and has a time lag excessively.

Accordingly, the PLC system and the process system are configured to perform data transmission / reception by wireless communication, so that a PLC system that facilitates installation work and facilitates maintenance is being studied.

2 is a diagram showing a remote radio control apparatus disclosed in Registration No. 20-0431768 (entitled Remote Radio Control Device of a Sitter Furling System Using Zigbee Communication).

The remote radio control apparatus 200 of FIG. 2 includes a sputtering system 201, a sub-ZigBee transceiver 203 connected to a device of the sputtering system 201 requiring remote control, a sub ZigBee transceiver 203, A main Zigbee transceiver 205 connected to the main Zigbee transceiver 203 via a Zigbee communication and a central control unit 207 connected to the main Zigbee transceiver 205 and having input means and display means.

At this time, since the device is installed inside the process area and the sub-ZigBee transceiver 203 is installed outside the process area, the control unit of the device and the sub ZigBee transceiver 203 are configured to perform data communication using infrared communication.

The conventional art 100 configured in this manner connects the sub-ZigBee transceiver 203 to the devices constituting the sputtering system 201 and connects the sub-ZigBee transceiver 203 connected to the device to the main ZigBee transceiver 205 Is connected to the central control unit 207 to wirelessly connect the devices for the sputtering system 201, so that the devices can be efficiently managed from a remote place.

However, since the conventional ZigBee transceiver 203 and the main ZigBee transceiver 205 are installed outside the process area when a communication error occurs when the conventional technology 100 is applied to a high-precision facility requiring a predetermined processing environment, Since the control unit of the device is installed inside the process zone, in order to check the infrared communication module of the control unit for performing the infrared communication with the sub-ZigBee transceiver 203, the internal processing environment of the sputtering system 201 The manager must enter the inside of the process zone. Once the equipment is inspected, the internal process zone of the sputtering system 201 should be formed into the optimum processing environment. Thus, during the process environment release and formation time, The process rate is significantly lowered, and equipment inspection is troublesome .

In addition, since the conventional technique 200 is configured to include a single communication module for performing infrared communication with the sub-ZigBee transceiver 203, when a failure occurs in the sub-ZigBee transmission / reception unit 203, There is no method for replacing the ZigBee transceiver 203, and there is a limit to perform the equipment check after releasing the machining environment as described above.

That is, it is possible to (1) send and receive data to and from the control unit and the PLC device of the process robot without using a data cable, (2) provide an auxiliary data transmission / reception method as well as a main data transmission / reception method, It is urgent to study PLC system with high precision equipment which can minimize the number of PLCs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a process control system for controlling a process system, The present invention is to provide a PLC system using wireless communication in which data is transmitted and received in a wireless communication manner with a process control unit, thereby simplifying wiring and facilitating maintenance without installing a data cable.

Another object of the present invention is to provide a communication system including a main communication module for performing data communication with a process control unit and a plurality of auxiliary communication modules driven when the main communication module is not operated, Provides a PLC system using wireless communication that can increase the accuracy of communication by driving the auxiliary communication module when the module malfunctions or errors, and it does not need to release the processing environment, so that the process can be continued without stopping and dramatically improving the process rate .

Further, another object of the present invention is to provide a communication apparatus and a process control unit configured to perform infrared ray (IR) communication, and at the same time to determine whether an auxiliary communication module is driven according to whether or not an IR control signal transmitted from a process control unit is received And to provide a PLC system using wireless communication capable of dramatically increasing communication efficiency.

Another object of the present invention is to provide a transparent transparent plate on one side of a process enclosure connected to a vertical line connecting the IR transmitter of the process controller and the IR receiver module of the communication device, And to provide a PLC system using the line communication capable of increasing the communication speed.

According to an aspect of the present invention, there is provided a processing system including a process enclosure in which a predetermined processing environment is formed, a process robot installed inside the process enclosure to perform a predetermined process, A processing system including a communication device connected to the process robot; A process control unit controlling the process system including a control instrument and a switch of the process system, the process control unit being installed outside the process enclosure; A PLC device which is a controller which is installed in an operating program of a programmable logic controller and controls the process control unit by processing by a user's instruction; And a wireless communication network for providing a data movement path between the communication device and the process control unit, wherein the communication device includes a communication module for connecting to the wireless communication network and performing data communication, And the communication device transmits the communication priority to the process control unit via the communication module, wherein the communication device has a plurality of communication modules, the communication device sets and stores a communication priority of the communication modules, The process control unit transmits a control signal to the communication device when it is requested to check the communication from the PLC device, and when it is determined that the communication is not normally performed, The communication device receives the control signal When the next transmission is to drive the first communication module of rank.

delete

The communication device may further include: an input module for inputting process-related data from the process robot; A plurality of communication modules having a predetermined priority, connected to the wireless communication network and performing data communication with the process control unit; Related data to the process control unit through a communication module having a higher priority among the communication modules when the process-related data is input from the process robot through the input module, and inputs a control signal from the process control unit Preferably, the control module includes a control module for driving the communication module having the next highest priority, and excluding the communication module having the higher priority.

In addition, in the present invention, the process control unit may include an IR (infrared ray) transmission unit to transmit the control signal as an IR signal, and the communication device may include an IR receiving module receiving an IR control signal transmitted from the IR transmission unit of the process control unit .

In the present invention, it is preferable that a transparent transparent plate is installed on one side of the side wall, which is connected to a vertical line connecting the IR transmitter of the process control unit and the IR receiver module of the communication device.

Also, in the present invention, the wireless communication network is preferably a bluetooth network.

Further, in the present invention, it is preferable that the processing environment includes at least one of a vacuum degree, a gas concentration to be injected, and a temperature.

According to the present invention having the above-described problems and the solution, the data cable passing through the process enclosure is removed to simplify the wiring and facilitate the installation work.

According to the present invention, the auxiliary communication module is configured to operate when the communication device includes a plurality of communication modules and the main communication module is not operating normally, thereby enhancing the safety and reliability of the data communication.

According to the present invention, the communication device can determine whether the main communication module operates normally or whether the auxiliary communication module operates by a simple design change.

Further, according to the present invention, even if communication is not normally performed, the processing environment inside the process enclosure is not required to be released, so that the process rate can be maximized.

1 is an exemplary diagram showing a PLC system of a conventional high precision facility.
2 is a diagram showing a remote radio control apparatus disclosed in Registration No. 20-0431768 (entitled Remote Radio Control Device of a Sitter Furling System Using Zigbee Communication).
FIG. 3 is a block diagram showing a PLC system for a high-precision facility, which is an embodiment of the present invention.
4 is an exemplary view showing the installation state of Fig.
5 is a block diagram showing the communication device of Fig.
Fig. 6 is a second embodiment of Fig.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a configuration diagram showing a PLC system for a high-precision facility according to an embodiment of the present invention, and FIG. 4 is an exemplary view showing the installation state of FIG.

The PLC system 1 according to an embodiment of the present invention comprises a processing system 7, a process control unit 5, a PLC device 3 and a local area wireless communication network 6 as shown in Figs. At this time, the PLC device 3 and the process control unit 5 may be connected by either wire communication or wireless communication.

The short-range wireless communication network 6 is a communication network that provides a data movement path between the communication device 75 and the process control unit 5 and includes a NFC (Bluetooth), a wireless fidelity, an infrared ray (IR), and a radio frequency identification (RFID). Preferably, the Bluetooth communication network is a Bluetooth communication network.

The process system 7 includes a process enclosure 71 in which the interior of the process enclosure 71 is closed and a predetermined processing environment is maintained, a process robot 71 installed in the process space S, And a communication device 75 connected to the process robot 73 and connected to the short range wireless communication network 6 and performing data communication with the process control unit 5. [

The process enclosure 71 is also provided with processing environment actuators (not shown) for forming and releasing the internal processing space S into a predetermined processing environment, although not shown in the figure. The processing environment may be applied to the amount of gas, the vacuum degree and temperature of the vacuum chamber, and the processing environment actuators may include a pneumatic line for forming a vacuum chamber, a valve and inlet for injecting and withdrawing a specific gas, Means and the like.

For example, when a vacuum deposition system is applied to the process system 1, an optimal processing environment forms a vacuum chamber, while at the same time a depressurizing gas such as CH4 or SiH4 is injected into the vacuum chamber, A pneumatic line for forming a vacuum chamber, and a valve for supplying depressurization gas.

That is, the processing enclosure 71 can form a processing environment suitable for the process by the processing environment actuators.

Although not shown in the drawing, various sensors for detecting the vacuum degree of the vacuum chamber, the gas concentration and temperature injected into the vacuum chamber, and the like are installed in the process enclosure 71, 75, and is transmitted to the process control unit 5 through the communication device 75.

The transparent plate 711 is disposed on one side of the process enclosure 71 and the transparent plate 711 is connected to the IR transmitting unit 51 of the process control unit 5 and the IR receiving module 70 of the communication device 75, (757) of the process container (71). At this time, the transparent plate 711 is formed of a transparent material that can ensure transmission loss of an infrared signal.

In other words, since the infrared ray signal is interrupted by the semi-transparent or opaque material, the transparent plate 711 is provided on one side of the process enclosure 71, so that the process control unit 5 and the communication The IR communication of the device 75 is facilitated. The IR signal is used as a control signal transmitted from the process control unit 5 to the communication device 75 to operate the auxiliary communication module of the communication device 75 when the main communication module of the communication device 75 is not normally operated The operation of the communication device 75 based on this IR signal will be described later in detail with reference to FIG.

The process robot 73 is installed in the process enclosure 71 and performs predetermined processes and processes such as an end-effector, a chucking unit, a transfer unit, a heat treatment unit, and an etching unit.

Further, the process robot 73 includes input / output contacts such as various sensors, relays, and motors, and data (hereinafter referred to as process-related data) detected by these input / output contacts is input to the communication device 75.

The communication device 75 is connected to the process robot 73 and receives process-related data from the process robot 73.

The communication device 75 includes a plurality of communication modules for transmitting and receiving data to and from the process control unit 5 with a communication interface for supporting connection with the local wireless communication network 6, And an IR receiving module for receiving a signal. The reason why the plurality of communication modules are formed, the operation method of the plurality of communication modules, and the operation method of the IR receiving module will be described in detail with reference to FIG.

The PLC apparatus 3 is a device for facilitating the operation control of the process robot in the industrial field and has an input, output, memory, and arithmetic control unit. The PLC apparatus 3 is installed and processes by the user's command, ).

The PLC device 3 includes an input unit connected to the process control unit 5 to input process-related information from the process control unit 5 as well known in the art, a central processing unit An output unit for outputting a signal controlled by the central processing unit to the process control unit 5, a memory for storing a PLC operation program, a communication interface unit for supporting data communication with the process control unit 5, machine interface, and the configuration of the PLC device 3 is a technique commonly used in a PLC system, and thus a detailed description thereof will be omitted.

In addition, when the process-related information received from the process control unit 5 is out of the predetermined threshold, the PLC device 3 determines that the process system 7 or communication has not been normally performed, 5) to request the communication module check. At this time, when the process control unit 5 receives a request for the communication module check from the PLC device 3, the process control unit 5 drives the infrared transmission unit.

The process control unit 5 includes a control system for controlling the process system 7 and the process robot 75 by providing control instruments and switches for the process system 7 and the process robot 75.

The process control unit 5 also includes a communication module which is connected to the local area wireless communication network 6 and transmits and receives data to and from the communication modules of the communication device 75. When the process control unit 5 receives the process related information from the communication device 75, (3).

The process control unit 5 also includes an IR transmission unit for transmitting an IR signal. When requested to check the communication module from the PLC device 3, the process control unit 5 controls the IR transmission unit 51 to transmit an IR signal to the communication device 75 .

5 is a block diagram showing the communication device of Fig.

The communication device 75 is connected to the short range wireless communication network 6 and is provided with a communication interface for performing data communication with the process control unit 5. The communication device 75 is connected to the process robot 73, , Relay, motor, and the like, it transmits the input process-related data to the process control unit 5.

5, the communication device 75 includes a main communication module 753 connected to the short-range wireless communication network 6 and transmitting process-related data input from the process robot 73 to the process control module 5, And an auxiliary communication module 755 for transmitting the process-related data, which is inputted in place of the main communication module 753 under the control of the process control unit 5, to the process control unit 5 when an error occurs in the main communication module 753 An IR receiving module 757 that receives the control signal transmitted from the process control unit 5, an input module 759 that receives process related information from the process robot 73, and an IR receiving module 757 And a control module 751 that receives the control signal from the process control unit 5 and drives the auxiliary communication module 755 in place of the main communication module 753. [ In FIG. 5, for example, the auxiliary communication module has been described as an example. However, the auxiliary communication module may be composed of a plurality of auxiliary communication modules.

The control module 751 is an operating system (OS) that controls the communication device 75 and manages and controls the management objects 753, 755, 757, and 759.

The control module 751 receives the process related data from the process robot 73 and drives the main communication module 753 to transmit the process related data to the process control module 5 through the main communication module 753.

The control module 751 receives the control signal from the process control unit 5 through the IR receiving module 757 and drives the auxiliary communication module 755 in place of the main communication module 753, And transfers process-related data to the process control unit 5.

The main communication module 753 and the auxiliary communication module 755 can also transmit and receive data to and from the process control unit 5 with a communication interface supporting connection with the local area wireless communication network 6. At this time, various local communication networks such as RF, NFC, Wi-Fi, Zigbee communication network and the like may be applied to the data communication network 6, and it is preferable that the data communication network 6 is bluetooth in detail.

The process robot S 73 and the communication device 75 are installed inside the process zone S and the process control unit 5 is installed outside the process zone S and the communication device 75 and process And the control unit 5 is configured to perform wireless communication through the local area wireless communication network 6. [

The present invention is also applicable to the case where the PLC device 3 does not receive the process related data from the main communication module 753 through the process control unit 5 or the process related data received from the main communication module 753 exceeds the threshold The control unit 5 requests the process control unit 5 to check the communication module. At this time, when the process control unit 5 is requested to check the communication module from the PLC device 3, the control unit 5 drives the IR transmission unit 51 to transmit a control signal to operate the auxiliary communication module 755 from the IR transmission unit 51, When the control signal is inputted through the IR receiving module 757, the device 75 drives the auxiliary communication module 755 under the control of the control module 751.

At this time, a transparent plate 711 of transparent material which does not disturb the movement of the IR signal is provided on the outer wall of the process enclosure 71, and the IR signal transmitted from the process control unit 5 passes through the transparent plate 711, And the communication device 75 receives the IR signal from the process control unit 5 and drives the auxiliary communication module 755 to transmit the process related data so that the main communication module 753 is not operated as a malfunction The data communication can be performed through the auxiliary communication module 755. Accordingly, the internal processing environment of the process enclosure 71 is not released and the process is continuously performed.

Fig. 6 is a second embodiment of Fig.

6 includes a main communication module 753, an IR receiving module 757 and an input module 759 having the same configuration as that of the communication device 75 of FIG. 5 described above. The communication device 85 includes a plurality (N ... 855-N and 855-N of the auxiliary communication modules 855-1 to 855-N and the connection targets 753, 855-1, ..., 855-N, Lt; RTI ID = 0.0 > 759 < / RTI >

At this time, the communication priority levels of the auxiliary communication modules 855-1, ..., and 855-N are set in the order of the auxiliary communication modules 855-1, ..., and 855-N.

The control module 851 receives process-related data from the process robot 73 and controls the process control module 5 to transmit process-related data via the main communication module 753.

The control module 851 receives the IR control signal from the process control unit 5 through the IR receiving module 757 and then drives the auxiliary communication module 855-1 without driving the main communication module 753 .

The control module 851 receives the IR control signal from the process control unit 5 via the IR receiving module 757 and drives the auxiliary communication module 855-2 in place of the auxiliary communication module 855-1, This operation is repeated.

In other words, the communication device 85 includes a plurality of communication modules to increase the safety and reliability of data communication by driving the communication module of the next priority when communication is not normally performed, The process is not stopped and the process is continuously performed, so that the process rate and the productivity can be increased.

1: PLC system 3: PLC device 5: Process control unit
6: Short-range wireless communication network 7: Process system 71: Process enclosure
73: process robot 75: communication device 751: control module
753: main communication module 755: auxiliary communication module 757: IR receiving module
759: input module

Claims (7)

And a communication device installed inside the process enclosure and connected to the process robot. The process enclosure includes a process enclosure in which a predetermined processing environment is formed, a process robot installed in the process enclosure to perform a predetermined process, Process system;
A process control unit controlling the process system including a control instrument and a switch of the process system, the process control unit being installed outside the process enclosure;
A PLC device, which is a controller that is installed in an operating program of a programmable logic controller and controls the process control unit by processing by a user's instruction;
And a wireless communication network for providing a data movement path between the communication device and the process control unit,
Wherein the communication device includes a communication module connected to the wireless communication network and performing data communication, and transmits process-related data input from the process robot to the process control module through the communication module,
Wherein the communication device has a plurality of communication modules, the communication device sets and stores a communication priority of the communication modules,
When the process related data received from the process control unit exceeds the threshold value, the PLC device determines that the communication is not normally performed and requests the process control unit to check the communication. When the process control unit receives the communication check request from the PLC device, Wherein the control unit transmits a control signal to the communication device, and when the control unit receives the control signal from the process control unit, the communication unit drives the communication module of the next priority. delete The method of claim 1, wherein the communication device
An input module for inputting process-related data from the process robot;
A plurality of communication modules having a predetermined priority, connected to the wireless communication network and performing data communication with the process control unit;
Related data to the process control unit through a communication module having a higher priority among the communication modules when the process-related data is received from the process robot through the input module, and inputs a control signal from the process control unit Wherein the control module includes a control module that drives the communication module of the next priority when it receives the communication module and excludes the communication module of the higher priority from the target. The apparatus of claim 3, wherein the process control unit includes an IR (infrared ray) transmission unit to transmit the control signal as an IR signal,
Wherein the communication apparatus further comprises an IR receiving module for receiving an IR control signal transmitted from the IR transmitting unit of the process control unit. 5. The process cartridge according to claim 4,
Wherein a transparent transparent plate is installed on one side of the side wall connected to the vertical line connecting the IR transmitter of the process control unit and the IR receiver module of the communication device. The PLC system according to any one of claims 1 to 5, wherein the wireless communication network is a bluetooth network. The PLC system according to claim 6, wherein the processing environment includes at least one of a vacuum degree, a gas concentration to be injected, and a temperature.
KR1020150059659A 2015-04-28 2015-04-28 plc system using wireless communication KR101738947B1 (en)

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CN109445372A (en) * 2018-10-29 2019-03-08 红塔烟草(集团)有限责任公司 A kind of motor rotation real-time monitoring device based on PLC
KR20220114777A (en) 2021-02-09 2022-08-17 목포대학교산학협력단 Method And Apparatus for PLC Loading

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008221377A (en) * 2007-03-12 2008-09-25 Koyo Electronics Ind Co Ltd Radio control device for work machining position and radio proximity sensor used for the radio control device
KR101413355B1 (en) * 2013-01-30 2014-07-01 주식회사 야스 Deposition rate sensor integrated with controller module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008221377A (en) * 2007-03-12 2008-09-25 Koyo Electronics Ind Co Ltd Radio control device for work machining position and radio proximity sensor used for the radio control device
KR101413355B1 (en) * 2013-01-30 2014-07-01 주식회사 야스 Deposition rate sensor integrated with controller module

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