CN114839919A - Programmable control device - Google Patents

Programmable control device Download PDF

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Publication number
CN114839919A
CN114839919A CN202210341661.5A CN202210341661A CN114839919A CN 114839919 A CN114839919 A CN 114839919A CN 202210341661 A CN202210341661 A CN 202210341661A CN 114839919 A CN114839919 A CN 114839919A
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China
Prior art keywords
input
signal
triode
control device
programmable control
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CN202210341661.5A
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Inventor
杨齐祥
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Kehao Dongguan Automation Equipment Co ltd
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Kehao Dongguan Automation Equipment Co ltd
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Priority to CN202210341661.5A priority Critical patent/CN114839919A/en
Publication of CN114839919A publication Critical patent/CN114839919A/en
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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
    • G05B19/054—Input/output
    • 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
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/11—Plc I-O input output
    • G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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

Abstract

The application discloses programmable control device relates to the industrial automation control field, can solve and realize the problem that can not directly exchange data between different PLC host computers through the mode of always controlling. The device mainly includes: a main controller; the first communication module is connected with the main controller and is used for being connected with a PLC interface of a previous-stage programmable controller; the second communication module is connected with the main controller and is used for being connected with a next-stage PLC interface; a signal input circuit connected with the main controller; and the signal output circuit is connected with the main controller. Through setting up first communication module and second communication module, can realize interconnection and direct exchange data between the different PLC, can reduce the system design complexity of distributed automation line.

Description

Programmable control device
Technical Field
The application relates to the field of industrial automation control, in particular to a programmable control device.
Background
Programmable Logic Controllers (PLCs) are widely used in automated seed production in the field of industrial applications, and particularly, automation devices need to be controlled by the PLCs. The hardware system of the PLC comprises a host and an expansion module. The expansion module realizes corresponding control functions under the control of the host. To accommodate the complexity of modern automation equipment, PLC capacity and host processing speed are continually increasing, which in turn leads to higher and higher costs for implementing automation.
In the related art, the host in the hardware system of the PLC is a closed single host system, and the expansion function is weak. If the automatic production line uses a plurality of PLC hosts, the different PLC hosts realize total control through a main controller (such as a touch screen and an industrial personal computer), and data cannot be directly exchanged. In addition, when data exchange is performed between different PLC hosts in a master control manner, complicated application programs need to be written, which is difficult to implement.
Disclosure of Invention
The application provides a programmable control device to solve the problem that data can not be directly exchanged between different PLC hosts in a master control mode.
The application provides a programmable control device, comprising: a main controller; the first communication module is connected with the main controller and is used for being connected with a PLC interface of a previous-stage programmable controller; the second communication module is connected with the main controller and is used for being connected with a next-stage PLC interface; a signal input circuit connected with the main controller; and the signal output circuit is connected with the main controller.
Further, the signal input circuit includes at least one set of input circuits, each of which includes 8 input signal transmission circuits.
Further, the input signal transmission circuit comprises an input signal indicator light, an optical coupling component and an input signal interface; one end of the input signal indicator light is connected with a first input end of the optocoupler component, and the other end of the input signal indicator light is connected with a first rated voltage output end; the second input end of the optocoupler component is connected with the ground wire; and a first output end of the optical coupling component is connected with the input signal interface.
Further, in the case that the signal input transmission circuit is an external common ground NPN type input circuit, the signal input transmission circuit includes a first transistor; the first output end of the optocoupler component is connected with the collector of the first triode; the emitting electrode of the first triode is connected with the ground wire; the base level of the first triode is connected with the input signal interface; and a second output end of the optical coupling component is connected with a second rated voltage output end.
Further, under the condition that the signal input transmission circuit is an external non-common-ground NPN-type input circuit, the signal input transmission circuit comprises a second triode; the other end connected with the optocoupler component is connected with a collector of the second triode; the emitter of the second triode is connected with the negative electrode of the third rated voltage output end; the base level of the second triode is connected with the input signal interface; and a second output end of the optical coupling component is connected with the anode of the third rated voltage output end.
Furthermore, under the condition that the signal input transmission circuit is an external non-common ground PNP type input circuit, the signal input transmission circuit comprises a third triode; the other end connected with the optocoupler component is connected with a collector of a third triode; an emitter of the third triode is connected with the anode of the fourth rated voltage output end; the base level of the third triode is connected with the input signal interface; and a second output end of the optical coupling component is connected with a negative electrode of a fourth rated voltage output end.
Further, the signal output circuit comprises a driving load and a field effect transistor connected with the driving load, and the field effect transistor is used for performing overshoot protection on the driving load.
Further, the driving load is any one of: solenoid valve, timer, high-speed pulse control servo driver and step motor driver.
The application provides a programmable control device, through setting up first communication module and second communication module, can realize interconnection and direct exchange data between the different PLC, can reduce the system design complexity of distributed automation line.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic structural diagram of a programmable control device provided in the present application;
FIG. 2 is one of the connection topologies of an industrial system provided herein;
FIG. 3 is a second connection topology of an industrial system provided herein;
FIG. 4 is a schematic diagram of a communication interface circuit provided herein;
FIG. 5 is a schematic diagram of the connections between communication interface modules provided herein;
FIG. 6 is one of the schematic diagrams of a signal output circuit provided herein;
FIG. 7 is a schematic circuit diagram of an isolated input cell of the input output control module;
FIG. 8 is a second schematic diagram of a signal output circuit provided in the present application;
FIG. 9 is a third schematic diagram of a signal output circuit provided in the present application;
FIG. 10 is a fourth schematic diagram of a signal output circuit provided herein;
fig. 11 is a schematic circuit diagram of an NPN type output unit;
FIG. 12 is a schematic diagram of an NPN output external connection;
FIG. 13 is a schematic diagram of NPN output servo drive connections;
description of the drawings: 11-a main controller, 12-a first communication module, 13-a second communication module, 14-a signal input circuit, 15-a signal output circuit, 21-an input signal indicator lamp, 22-an optical coupling component, 23-an input signal interface, 31-a first triode, 32-a second triode and 33-a third triode.
Detailed Description
Fig. 1 is a schematic structural diagram of a programmable control device. The application provides a programmable control device, includes:
a main controller 11; the first communication module 12 is connected with the main controller 11, and the first communication module 12 is used for being connected with a PLC interface of a previous-stage programmable controller; the second communication module 13 is connected with the main controller 11, and the second communication module 13 is used for being connected with a next-stage PLC interface; a signal input circuit 14 connected to the main controller 11; and a signal output circuit 15 connected to the main controller 11.
The programmable control device provided by the application comprises the main controller 11, the signal input circuit 14 and the signal output circuit 15, so that the programmable control device can be used as a host computer or an expansion module, and has high compatibility. On the basis, the types and types of the programmable control device can be reduced, so that the same hardware circuit can realize various unit functions, and the cost for producing the programmable control device is further reduced.
In the programmable control device provided by the application, data can be simply and automatically exchanged through the first communication module 12 and the second communication module 13. In the application process, any programmable control device can independently realize the function control unit, and the interconnection of each function control unit can be realized through the first communication module 12 and the second communication module 13, so that the control of an industrial system is realized.
It should be noted that any one of the above programmable control devices is designed to implement a function control unit, i.e., to implement control of an industrial system, so that it is possible to avoid using a large-scale programmable control device in the industrial system, i.e., to avoid using a large-capacity and ultra-high-speed process required by the large-scale programmable control device, thereby greatly reducing the control cost of the industrial system.
It should be noted that the programmable control device is designed to implement a simple function control unit, and the programming of the programmable control program for the function on the main controller 11 is also simple. Therefore, the master control program of the integrated industrial system only needs to pay attention to the master control function, and the program implementation difficulty is reduced. That is to say, in the industrial system, the functional control unit designed and realized by the programmable control device can reduce the software design difficulty of the industrial system and reduce the programming workload, thereby effectively reducing the system debugging time, finally reducing the software design cost of the control industrial system, improving the success rate of realizing the control industrial system and shortening the delivery cycle of realizing the control industrial system.
It will be appreciated that the industrial system design is divided into individual functional control units, wherein the functional control units are implemented by programming the main controller 11 in the programmable control device. Each function control unit in the industrial system can simultaneously and independently operate (equivalent to multi-core operation), so that the execution efficiency of the industrial system is improved. Moreover, the industrial system can realize modular design and distributed design, further reduce the cost of the automatic design of the industrial system, improve the success rate of realizing the control of the industrial system and shorten the delivery cycle of realizing the control of the industrial system.
It should be noted that, since the conventional programmable controller is a single integrated controller, different industrial systems have different implementation versions. As more and more industrial systems grow over time, maintaining previous devices and maintaining multiple versions of numerous industrial systems becomes a significant cost burden. Moreover, new industrial systems also require a significant amount of repetitive labor. With the distributed architecture design of the present application, the control system can be divided into different functional control units, and the functional control units are independent and consolidated. The performance and the stability of the function control unit can be further improved, and a large amount of repeated design workload among different industrial systems can be effectively reduced. The function control unit is more beneficial to mass production to reduce the implementation cost. Design of new industrial systems the design risk of industrial systems is also greatly reduced due to the use of sophisticated functional control units.
Alternatively, the main controller 11 of the programmable control device may be a processor using ARM Cortex (different models of processors may be used depending on the function). The processor realizes input signal detection, output control, communication with upper and lower PLC interfaces and automatic data exchange, and realizes bottom code support and execution environment of programmable function.
Optionally, the programmable control device is designed to implement a function control unit, and in order to implement automatic data exchange with the upper module and the lower module, the first communication module 12 may include at least one first communication interface, and may be connected to other function control units, an industrial personal computer, a touch screen, and a terminal through the first communication interface; the second communication module 13 may include at least one second communication interface, and may be connected to other function control units, an industrial personal computer, a touch screen, and a terminal through the second communication interface. It should be noted that the first communication interface and the second communication interface may be RS232 and RS485 in the industry standard, or other communication modes (such as network communication, wireless communication, etc.).
In an industrial system, as shown in fig. 2 and 3, a programmable control device and a touch screen or a terminal may be networked in a linear connection or tree connection manner, so as to implement a control function of a whole automation device, an automatic test device, or an automation pipeline. The programmable control device may be an input/output control device, a motion control device, or a parameter testing device. The programmable control device may also be connected to an industrial personal computer.
Specifically, as shown in fig. 4, a schematic diagram of the communication interface circuit of the first communication module 12 or the second communication module 13 may adopt a chip providing two RS232 communication interfaces and a chip providing 1 RS485 interface. The first communication interface or the second communication interface uses an 8-pin or 6-pin connector. When an 8-pin connector is used, 2 paths of RS232 leading wires and 1 path of RS485 leading wires are provided on the interface. When a 6 pin connector is used, 2 RS232 leads are provided on the interface. The two interfaces provide 5V/100mA auxiliary power output, and can provide power supply for the external communication conversion module (or provide power supply for the interface circuit of the servo driver). The external communication conversion module typically comprises an RS232 conversion module, an RS485 and RS422 conversion module, a network communication module, a wireless communication module and the like.
The communication connection between the programmable control devices is also simple. Fig. 5 is a schematic diagram illustrating the connection between the communication interfaces of the programmable control device. According to RS232 wiring requirements, all programmable control devices are only required to be connected with the ground, a transmitting end and a receiving end are connected in a cross mode, communication ports of all programmable control devices are connected in series, and automatic data exchange can be carried out among all programmable control devices under the control of driving software.
Further, the signal input circuit 14 includes at least one set of input circuits, each of which includes 8 input signal transmission circuits.
In this way, by providing a plurality of input circuits for connecting to a plurality of programmable control devices, terminals or touch screens, and setting each input circuit as 8 input signal transmission circuits, signal transmission with a plurality of programmable control devices, terminals or touch screens can be ensured.
Further, the input signal transmission circuit comprises an input signal indicator light 21, an optical coupling component 22 and an input signal interface 23; one end of the input signal indicator light 21 is connected with a first input end of the optical coupling element 22, and the other end of the input signal indicator light 21 is connected with a first rated voltage output end; a second input end of the optocoupler 22 is connected with a ground wire; a first output terminal of the optocoupler 22 is connected to the input signal interface 23.
As shown in fig. 6, the input signal is isolated from the signal received by the main controller 11 by the optical coupler element 22, the optical coupler element 22 may be a bidirectional optical coupler element 22, and the input signal indicator light 21 may be an LED indicator light. The LED indicator light may be used to indicate a turn-on amount input or a sensor input.
As shown in fig. 7, for an arbitrary input circuit, which includes 8 input signals, 10 hardware interfaces are provided in the programmable control device, wherein one interface is connected to the ground, and the other interface is connected to the first rated voltage output terminal (24V) through the short-circuit resistor R1. Assuming that each optical coupling element 22 is capable of processing 4 optical signals, two optical coupling elements 22 are included in one input signal transmission circuit.
As shown in fig. 8-10, the isolated input can accept various input modes such as an externally common NPN input, an externally non-common NPN input, and an externally non-common PNP input.
Further alternatively, in the case where the signal input transmission circuit is an external common ground NPN type input circuit, the signal input transmission circuit includes a first transistor 31; a first output end of the optocoupler 22 is connected with a collector of the first triode 31; the emitter of the first triode 31 is connected with the ground wire; the base stage of the first triode 31 is connected with the input signal interface 23; a second output terminal of the optocoupler component 22 is connected to a second rated voltage output terminal.
Further optionally, in the case that the signal input transmission circuit is an external non-common-ground NPN-type input circuit, the signal input transmission circuit includes a second transistor 32; the other end connected with the optocoupler component 22 is connected with the collector of the second triode 32; an emitting electrode of the second triode 32 is connected with a negative electrode of the third rated voltage output end; the base stage of the second triode 32 is connected with the input signal interface 23; a second output terminal of the optocoupler component 22 is connected to the positive terminal of the third rated voltage output terminal.
Further optionally, in the case that the signal input transmission circuit is an external non-common ground PNP type input circuit, the signal input transmission circuit includes a third transistor 33; the other end connected with the optocoupler component 22 is connected with the collector of the third triode 33; an emitter of the third triode 33 is connected with the anode of the fourth rated voltage output end; the base stage of the third triode 33 is connected with the input signal interface 23; a second output terminal of the optocoupler 22 is connected to a negative terminal of the fourth rated voltage output terminal.
Further, the signal output circuit 15 includes a driving load, and a field effect transistor connected to the driving load, and the field effect transistor is used for performing overshoot protection on the driving load.
As shown in fig. 11, the signal output circuit 15 also isolates the controllable device from other electronic devices by isolation. Specifically, an optical coupler output mode or a relay output mode can be adopted.
Further, the driving load is any one of: solenoid valve, timer, high-speed pulse control servo driver and step motor driver.
In the embodiment of the present application, as shown in fig. 12, the connection manner of the driving load and the signal output circuit 15 is as shown in the figure. It should be noted that the output driver has a minimum load driving capability of 3A, and may be directly connected to a load such as a solenoid valve or a timer. The intermediate relay which needs to be externally connected at the output of most programmable control devices at present can be saved. And each 8-way output driver uses one connector for 1 group and uses an LED indicator lamp to indicate the output state, thereby facilitating debugging and inspection. The signal output circuit 15 has no power output to meet typical automation industry applications. An external load and an external power supply (typically a 24V supply) are connected to the output and the module ground. Control of the external load can be achieved.
In the embodiment of the present application, as shown in fig. 13, the signal output circuit 15 can output a high-speed pulse control servo or stepping motor driver in addition to driving a normal load (solenoid valve and timer). The power supply positive end is connected with the positive end (PULSE +, SIGN +, etc.) of the signal input pin of the servo driver through an external 5V (or 24V) power supply connection, the power supply negative end is connected with the grounding end of the programmable control device, and 2 output ports are respectively connected with the negative end (PULSE-, SIGN-) of the signal input pin of the servo driver. The PULSE output (PULSE) uses one of 4 paths of the programmable control device outputs Y00-Y03, and the direction control (SIGN) can use any other output channel. The 5V power supply driving the servo driver may also be connected from the 5V auxiliary power supply output of the communication interface, provided internally by the programmable control device.
For example, the programmable control device may set: sixteen isolation signal input circuits 14 and sixteen NPN signal output circuits 15; twenty-four paths of isolation signal input circuits 14 and eight paths of NPN signal output circuits 15; sixteen paths of isolation signal input circuits 14 and eight paths of NPN signal output circuits 15; twelve paths of isolation signal input circuits 14 and eight paths of NPN signal output circuits 15; eight isolated signal input circuits 14 and eight NPN signal output circuits 15; sixteen paths of isolation signal input circuits 14 and eight paths of relay signal output circuits 15; sixteen relay signal output circuits 15.
The application provides a programmable control device, through setting up first communication module 12 and second communication module 13, can realize interconnection and direct exchange data between the different PLC, can reduce the system design complexity of distributed automation line.
The same and similar parts in the various embodiments in this specification may be referred to each other.

Claims (8)

1. A programmable control apparatus, the apparatus comprising:
a main controller;
the first communication module is connected with the main controller and is used for being connected with a PLC interface of a previous-stage programmable controller;
the second communication module is connected with the main controller and is used for being connected with a next-stage PLC interface;
the signal input circuit is connected with the main controller;
and the signal output circuit is connected with the main controller.
2. The programmable control device of claim 1, wherein the signal input circuit comprises at least one set of input circuits, each input circuit of the at least one set of input circuits comprising 8 input signal transmission circuits.
3. The programmable control device of claim 2, wherein the input signal transmission circuit comprises an input signal indicator light, an optical coupling component, and an input signal interface;
One end of the input signal indicator light is connected with a first input end of the optocoupler component, and the other end of the input signal indicator light is connected with a first rated voltage output end;
the second input end of the optical coupling element is connected with the ground wire;
and the first output end of the optical coupling component is connected with the input signal interface.
4. The programmable control device of claim 3, wherein in the case where the signal input transfer circuit is an external common ground NPN-type input circuit, the signal input transfer circuit comprises a first transistor;
a first output end of the optocoupler component is connected with a collector of the first triode;
the emitting electrode of the first triode is connected with the ground wire;
the base level of the first triode is connected with the input signal interface;
and a second output end of the optical coupler component is connected with a second rated voltage output end.
5. The programmable control device of claim 3, wherein in the case where the signal input transfer circuit is an external non-common ground NPN input circuit, the signal input transfer circuit comprises a second transistor;
the other end connected with the optocoupler component is connected with a collector of the second triode;
The emitting electrode of the second triode is connected with the negative electrode of the third rated voltage output end;
the base level of the second triode is connected with the input signal interface;
and a second output end of the optical coupling component is connected with the anode of the third rated voltage output end.
6. The programmable control device of claim 3, wherein the signal input transfer circuit comprises a third transistor in the case where the signal input transfer circuit is an external non-common ground PNP type input circuit;
the other end connected with the optocoupler component is connected with a collector of the third triode;
an emitting electrode of the third triode is connected with the positive electrode of the fourth rated voltage output end;
the base stage of the third triode is connected with the input signal interface;
and a second output end of the optocoupler component is connected with a negative electrode of the fourth rated voltage output end.
7. The programmable control device of claim 1, wherein the signal output circuit comprises a driving load, and a fet connected to the driving load, the fet configured to provide overshoot protection to the driving load.
8. The programmable control device of claim 7, wherein the drive load is any one of: solenoid valve, timer, high-speed pulse control servo driver and step motor driver.
CN202210341661.5A 2022-04-02 2022-04-02 Programmable control device Pending CN114839919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210341661.5A CN114839919A (en) 2022-04-02 2022-04-02 Programmable control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210341661.5A CN114839919A (en) 2022-04-02 2022-04-02 Programmable control device

Publications (1)

Publication Number Publication Date
CN114839919A true CN114839919A (en) 2022-08-02

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Application Number Title Priority Date Filing Date
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