CN111581135A - Industrial bus IO module based on EtherCAT - Google Patents
Industrial bus IO module based on EtherCAT Download PDFInfo
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- CN111581135A CN111581135A CN202010605897.6A CN202010605897A CN111581135A CN 111581135 A CN111581135 A CN 111581135A CN 202010605897 A CN202010605897 A CN 202010605897A CN 111581135 A CN111581135 A CN 111581135A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- 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]
Abstract
The invention discloses an industrial bus IO module based on EtherCAT, which comprises: a housing; an output port is arranged on one side of the top of the shell, and an input port is arranged on the other side of the top of the shell; a bus output port, a bus input port, a power output port and a power input port are respectively arranged on one side surface of the shell; the inside of shell sets up IO module electrical structure, IO module electrical structure includes: the Ethernet control automation technology comprises an EtherCAT communication physical layer unit, an input unit, an output unit and a power supply unit; the input unit is connected with the input port, and the output unit is connected with the output port. The industrial bus IO module provided by the embodiment of the invention is convenient and quick to network and distribute; the field environment is clean, tidy and not messy; the cost of cables and material resources and the cost of manufacturing the wire harness are saved; the maintenance is convenient. The EtherCAT communication has high real-time performance, quick response, difficult error, safety and reliability; the EtherCAT network topology is flexible and changeable, and the adaptability is strong.
Description
Technical Field
The invention belongs to the technical field of automation equipment, and particularly relates to an industrial bus IO module based on EtherCAT.
Background
With the progress of science and technology, more and more factories and production lines realize automation and unmanned automation, and the automation integration level is increased from the previous unit level to the production line level, the workshop level and even the factory level. In the actual implementation process, a central controller (master control PLC) is mostly used in the production operation environment to perform centralized control and scheduling on the devices of the entire automation production line. However, the complexity of the automation level will burden the central controller (master PLC), especially the various cable and pipeline layout work on site. The traditional method is to connect the wire harnesses of all on-site IO equipment into an electric control cabinet where a central processing unit is located one by one, which cannot avoid and solve the problems that the electric control cabinet is far away in distance, the cable is long, the interference is serious, the complex work of defining the cable, branching, welding wire and the like is complicated, the error is easy to occur, and the reliability is low.
The prior art scheme is as follows: a conventional multi-core cable is used. In the method, a plurality of sensor cables are uniformly welded on a multi-core cable on site, and then are matched with an aviation plug and connected into a central processing unit (master control PLC) electric control cabinet. Or a device of a traditional multi-core cable and an IO separation box is adopted, and modular standard ports directly connected with various sensors are distributed on the IO separation box. Or adopt the device of fieldbus and IO separation box, traditional fieldbus has RS232, RS485, CAN bus, EtherNet/IP, ProfiNet, Modbus, etc..
Adopt traditional multicore cable, the on-the-spot cable harness is complicated. Even if a multi-core cable is adopted, the problem that the central processing electric control cabinet is far away, the cable is long and easy to wind cannot be avoided and solved; by adopting the traditional device of the multi-core cable and the IO separation box, although the on-site sensor end can be directly connected, the connection is more convenient, the length from the multi-core cable to a central processing unit (master control PLC) electric control cabinet is still longer, the signal interference is serious, and when more sensors are arranged, the problem of complicated cable routing is also caused; and the fault rate is high, and on the one hand, the cable is long apart from longer, and the power line twines with the signal line, and signal interference is serious, and on the other hand, the work error rate such as the complicated definition cable, separated time, bonding wire is high. The cost is high, the project field wiring work with large project amount usually needs to invest a large amount of manpower, material resources and financial resources, and the project cost is greatly increased. The maintenance and repair are inconvenient, a certain signal on site has problems, the conditions of line break, short circuit, normal plugging and the like need to be checked one by one, and the work of line drawing and line splitting is difficult.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to: the industrial bus IO module based on the EtherCAT thoroughly solves the defects of complex field cable harnesses, inconvenience in wiring and welding wires, high fault rate, high cost, inconvenience in maintenance and repair, poor instantaneity and applicability of other buses and the like of an automatic production line.
In order to achieve the purpose, the invention adopts the following technical scheme:
an EtherCAT-based industrial bus IO module comprising: a housing; an output port is arranged on one side of the top of the shell, and an input port is arranged on the other side of the top of the shell; a bus output port, a bus input port, a power output port and a power input port are respectively arranged on one side surface of the shell;
the inside of shell sets up IO module electrical structure, IO module electrical structure includes: the Ethernet control automation technology comprises an EtherCAT communication physical layer unit, an input unit, an output unit and a power supply unit; the input unit is connected with the input port, and the output unit is connected with the output port.
Further, the EtherCAT communication physical layer unit includes: an input communication physical layer and an output communication physical layer; the bus input port, the input network transformer, the input network transceiver and the EtherCAT microprocessor form an input communication physical layer of the bus IO module; the EtherCAT microprocessor, the output network transceiver, the output network transformer and the bus output port form an output communication physical layer of the bus IO module.
Further, the input unit comprises a first optical coupler isolation circuit U8 and a logic conversion circuit; a first capacitor C45 and a first resistor R79 are connected in parallel and then connected in series between a first terminal and a second terminal of a first light-coupled isolation circuit U8, a second resistor R71 is connected in series on the first terminal of the first light-coupled isolation circuit U8, a second capacitor C53 is connected in series between a third terminal and a fourth terminal of the first light-coupled isolation circuit U8, and a fourth resistor R87 is connected in series on the fourth terminal of the first light-coupled isolation circuit U8.
Further, the output unit includes a transistor driver chip circuit U17 and a relay control circuit J21, a signal circuit RA _ C0 is connected to the 1 st B terminal of the transistor driver chip circuit U17, and a signal circuit RA _ C0N0 is connected to the 1 st C terminal of the transistor driver chip circuit U17; a signal circuit RA _ C0N0 is connected in series with a first terminal of the relay control circuit J21, a signal circuit 5V voltage circuit VDD5 is connected in series with a second terminal of the relay control circuit J21, a signal circuit RA00 is connected in series with a third terminal of the relay control circuit J21, and a signal circuit RA0 is connected in series with a fourth terminal of the relay control circuit J21; the signal circuit RA _ C0 connected to the 1B terminal of the transistor driver chip circuit U17 drives the coil between the first and second terminals of the relay control circuit through the transistor driver chip circuit U17, so that the third and fourth terminals of the relay control circuit are turned on.
Further, the connection mode of the input port is as follows: the wiring pin definitions of the input ports comprise a 24VDC input port, a PGND input port, a DDIN0 input port and a DDIN00 input port; the 24VDC input port and the PGND input port provide a power supply for the external sensor on one hand, and provide short-circuit voltage for the DDIN00 input port on the other hand; if 24VDC is needed at the COM end, the DDIN00 input port is short-circuited with the 24VDC input port; if the COM end needs PGND, the DDIN00 input port is short-circuited with the PGND input port;
the output port is connected in a wiring mode: the wiring pin definition of the output port comprises a 24VDC output port, a PGND output port, a PA00 output port and a PA0 output port; the 24VDC output port and the PGND output port provide a power supply for an external execution mechanism on one hand, and provide short-circuit voltage for the relay control circuit on the other hand; if the relay control circuit needs to enable the high-level output, the output port of the PA00 is in short circuit with the output port of the 24 VDC; if the relay control circuit needs to enable the low level output, the output port of the PA00 is in short circuit with the output port of the PGND.
Furthermore, the top of the shell is provided with through mounting screw holes, and the mounting screw holes are used for being matched and fixed with screws on the shell.
Further, a guide rail buckle is fixed at the bottom of the shell and used for fixing the position of the shell.
Furthermore, a plurality of the output ports are adjacently arranged along the same straight line, and a plurality of the input ports are adjacently arranged along the same straight line.
Further, the top of shell still is provided with respectively: the system comprises a slave station state indicating lamp, a slave station error indicating lamp, a bus output connection state indicating lamp, a bus input connection state indicating lamp, a bus output hundred-million speed mode indicating lamp and a bus input hundred-million speed mode indicating lamp.
Furthermore, a plurality of IO modules are connected in series, one end of a power cable is inserted into a power output port of other slave units or directly connected into the electric control cabinet, the other end of the power cable is inserted into a power input port of the next-stage IO module, one end of a network communication cable is inserted into a network communication output port of other slave units or directly connected into a network communication output port of the master station, and the other end of the network communication cable is inserted into a network communication input port of the next-stage IO module.
The invention has the following beneficial effects:
1. the industrial bus IO module provided by the embodiment of the invention is provided with a 24VDC power input interface and a 24VDC power output interface, and on one hand, the industrial bus IO module is used for supplying power for the work of the IO module and other IO modules connected with the IO module; on the other hand, the 24VDC power supply of the power input interface of the IO module is connected to the IO input end and the IO output end circuit, and is used for supplying power to various external sensors and actuators. Because the EtherCAT network communication is adopted, the acquisition and control of all on-site IO signals can be realized through one network cable. Industrial field bus distributing type IO power supply and network communication form networked distribution system, need not all to insert main electric cabinet like traditional mode IO power cord, signal line again, and the distribution is more convenient, labour saving and time saving.
2. The input/output port provided by the industrial bus IO module provided by the embodiment of the invention can flexibly configure a wiring mode, can be compatible with a PNP type sensor and an NPN type sensor at the same time, and can be flexibly wired by a user according to the field condition of the user.
3. According to the industrial bus IO module provided by the embodiment of the invention, a single module supports 8 paths of digital input signal acquisition and 8 paths of digital output signal control, a plurality of IO module buses are supported to be connected in series, and each input signal and each output signal have corresponding state indicator lamps to display states. The user can freely expand, and the expansion quantity, the installation position and the like can be freely configured according to the specific conditions on site, and the system is flexible and convenient.
4. The industrial bus IO module provided by the embodiment of the invention has the advantages of high real-time performance, high responsiveness, safety and reliability, each IO module on site is sequentially connected in series to form an EtherCAT network topology structure, each IO module is an EtherCAT slave station, and the EtherCAT master station acquires the address of each EtherCAT slave station, so that each IO signal on site is acquired and controlled in real time, and network communication is realized.
5. The industrial bus IO module provided by the embodiment of the invention comprises: a housing; an output port is arranged on one side of the top of the shell, and an input port is arranged on the other side of the top of the shell; a bus output port, a bus input port, a power output port and a power input port are respectively arranged on one side surface of the shell; the inside of shell sets up IO module electrical structure, IO module electrical structure includes: the Ethernet control automation technology comprises an EtherCAT communication physical layer unit, an input unit, an output unit and a power supply unit; the input unit is connected with the input port, and the output unit is connected with the output port. Networking wiring, convenience and rapidness; the field environment is clean, tidy and not messy; the cost of cables and material resources and the cost of manufacturing the wire harness are saved; the maintenance is convenient. The EtherCAT communication has high real-time performance, quick response, difficult error, safety and reliability; the EtherCAT network topology is flexible and changeable, and the adaptability is strong.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a structural diagram of an IO module of an industrial bus according to an embodiment of the present invention;
fig. 2 is an installation diagram of an IO module of an industrial bus according to an embodiment of the present invention;
FIG. 3 is an electrical schematic diagram of an IO module of an industrial bus according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of an EtherCAT communication physical layer of an IO module of an industrial bus according to an embodiment of the present invention;
FIG. 5 is an electrical schematic diagram of an input port of an IO module of an industrial bus according to an embodiment of the present disclosure;
FIG. 6 is an electrical schematic diagram of an output port of an IO module of an industrial bus according to an embodiment of the present disclosure;
fig. 7 is a diagram of an input/output connection manner of an IO module of an industrial bus according to an embodiment of the present invention;
fig. 8 is a topology diagram of a serial network of IO modules of an industrial bus according to an embodiment of the present invention;
wherein: 1 is a mounting screw hole; 2 is a shell; 3 is a power indicator lamp; 4 is an output port; 5 is an input port; 6 is a bus output port; 7 is a bus input port; 8 is a power output port; 9 is a power input port; 10 is a slave station status indicator lamp; 11 is a slave station error indicating lamp; 12 is a bus output connection status indicator light; 13 is a bus input connection state indicator light; 14 a hundred million speed mode indicator light is output by the bus; 15 is a hundred million speed mode indicator light of bus input; 201 is a buckle mounting threaded hole; 202 is a guide rail fastener; 301 is an EtherCAT communication physical layer unit; 302 is an input unit; 303 is an output unit; 304 is a power supply unit; 401 is an input network transformer; 402 is an input network transceiver; 403 is an EtherCAT microprocessor; 404 is an output network transceiver; 405 is an output network transformer; 701 is a PA00 output port; 702 is a 24VDC output port; 703 is a PGND output port; 704 is the PA0 output port; 705 is DDIN0 input port; 706 is a 24VDC input port; 707 is a PGND input port; 708 is a DDIN00(COM) input port; 801 is a first IO module; 802 is a second IO module; 803 is a third IO module; 804 is a first power cable; 805 is a first network communication cable; 806 is a second power cable; 807 is a second network communication cable; 808 is a third power cable; and 809 is a third network communication cable.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
The embodiment of the invention provides an industrial bus IO module based on EtherCAT.
As shown in fig. 1, the industrial bus IO module includes: a housing 2; an output port 4 is arranged on one side of the top of the shell 2, and an input port 5 is arranged on the other side; a bus output port 6, a bus input port 7, a power output port 8 and a power input port 9 are respectively arranged on one side surface of the shell 2; the inside of shell 2 sets up IO module electrical structure, IO module electrical structure includes: an EtherCAT communication physical layer unit 301, an input unit 302, an output unit 303, and a power supply unit 304; the input unit 302 is connected to the input port 5, and the output unit 303 is connected to the output port 4. The top of the shell 2 is also provided with: a slave station status indicator lamp 10, a slave station error indicator lamp 11, a bus output connection status indicator lamp 12, a bus input connection status indicator lamp 13, a bus output hundred mega speed mode indicator lamp 14, and a bus input hundred mega speed mode indicator lamp 15. 8 the output ports 4 are adjacently arranged along the same straight line, and 8 the input ports 5 are adjacently arranged along the same straight line.
Secondly, the installation mode of the IO module can be divided into two modes, as shown in fig. 2.
The first installation method comprises the following steps: the IO module can be directly installed at a proper position of an industrial field, such as on a production line body, through four installation screw holes 1 arranged on the periphery of the top of the shell 2;
the second installation method comprises the following steps: accessible buckle installation screw hole 201 is fixed guide rail buckle 202 at the IO module back, is equipped with the suitable position of guide rail at industrial field with IO module card again, for example in the electric cabinet.
Thirdly, the IO module electrical principle includes an EtherCAT communication physical layer unit 301, an input unit 302, an output unit 303, and a power supply unit 304, as shown in fig. 3.
(1) The EtherCAT communication physical layer unit of the IO module is shown in fig. 4.
The EtherCAT communication physical layer unit 301 includes: an input communication physical layer and an output communication physical layer; the bus input port 7, the input network transformer 401, the input network transceiver 402 and the EtherCAT microprocessor 403 form an input communication physical layer of a bus IO module; the EtherCAT microprocessor 403, the output network transceiver 404, the output network transformer 405, and the bus output port 6 form an output communication physical layer of the bus IO module. The input network transformer 401 and the output network transformer 405 are used for realizing isolation and impedance matching; the input network transceiver 402 and the output network transceiver 404 are used for converting eight independent 10Base-T and 100Base-TX twisted pair electrical signals and 100Base-FX optical signals into each other, and data transmission between two network connection media is realized by using a switching technology and a store-and-forward technology.
(2) The electrical principle of the input cell 302 of the IO module is shown in fig. 5.
The electrical principle of the 8 input ports of the input unit of the IO module is the same, and one input port is taken as an example for explanation. Input port electrical principle: the optical coupler comprises a first optical coupler isolation circuit and a logic conversion circuit, and the specific structure is as follows: the circuit comprises a first optical coupling and isolation circuit U8, a first capacitor C45(100nF) and a first resistor R79(1K) which are connected in series with a first terminal and a second terminal of the first optical coupling and isolation circuit U8 after being connected in parallel, a second resistor R71(3.3K) connected in series with the first terminal of the first optical coupling and isolation circuit U8, a second capacitor C53(100nF) connected in series between a third terminal and a fourth terminal of the first optical coupling and isolation circuit U8, and a fourth resistor R87(1K) connected in series with the fourth terminal of the first optical coupling and isolation circuit U8. The input port 1 circuit is used for receiving the running states and feedback signals of field equipment devices and various sensors, and has an anti-interference effect. In this example, the first resistor R79(1K) connected in parallel to the first optocoupler isolation circuit U8 is a current bleeder resistor, which mainly provides a channel for a weak current signal to prevent the led of the first optocoupler isolation circuit U8 from being turned on by mistake, and also has a function of dividing voltage with the second resistor R71 (3.3K).
(3) The output unit 303 of the IO module is shown in fig. 6.
The electrical principle of the 8 output ports of the IO module output unit is the same, and one output port is taken as an example for explanation. The electrical principle of the output port 1 comprises a transistor driver chip circuit and a relay control circuit, and the specific structure is as follows: comprises a transistor driver chip circuit U17, a signal circuit RA _ C0 connected to the 1B terminal of the transistor driver chip circuit U17, a signal circuit RA _ C0N0 connected to the 1C terminal of the transistor driver chip circuit U17; a relay control circuit J21, a signal circuit RA _ C0N0 connected in series to a first terminal of the relay control circuit J21, a signal circuit 5V voltage circuit VDD5 connected in series to a second terminal of the relay control circuit J21, a signal circuit RA00 connected in series to a third terminal of the relay control circuit J21, and a signal circuit RA0 connected in series to a fourth terminal of the relay control circuit J21. The output port 1 controls a signal output circuit to control a field device and various execution mechanisms. Transistor driver chip circuit U17 employs a ULN2003ADR chip, ULN2003ADR being a dual 16-pin package, NPN transistor driver chip. The chip has rich internal resources, consists of seven Darlington tubes and a coil-eliminating back electromotive force diode, and can be used for driving the relay. In this example, the signal circuit RA _ C0 connected to the 1B-th terminal of the transistor driver chip circuit U17 drives the coil between the first and second terminals of the relay control circuit through the transistor driver chip circuit U17, so that the third and fourth terminals of the relay control circuit are turned on.
(4) The input and output wiring of the IO module is shown in fig. 7.
The electrical principle of each port of the input and output wiring mode of the IO module is the same, and an input port and an output port are taken as examples for explanation:
the connection mode of the input port 5: the patch pin definition of input port 5 includes a 24VDC input port, a PGND input port, a DDIN0 input port, a DDIN00(COM) input port; the 24VDC input port and the PGND input port provide a power supply for an external sensor on one hand, and provide a short-circuit voltage for a DDIN00(COM) input port on the other hand; if 24VDC is needed at the COM end, the DDIN00(COM) input port is short-circuited with the 24VDC input port; if the COM end needs PGND, the DDIN00(COM) input port is in short circuit with the PGND input port;
the output port 4 is connected in a wiring mode: the wiring pin definition of the output port 4 comprises a 24VDC output port, a PGND output port, a PA00 output port and a PA0 output port; the 24VDC output port and the PGND output port provide a power supply for an external execution mechanism on one hand, and provide short-circuit voltage for the relay control circuit on the other hand; if the relay control circuit needs to enable the high-level output, the output port of the PA00 is in short circuit with the output port of the 24 VDC; if the relay control circuit needs to enable the low level output, the output port of the PA00 is in short circuit with the output port of the PGND.
And thirdly, the usage of the IO module in an EtherCAT industrial bus network topology is described by taking series connection as an example, as shown in fig. 8. In an EtherCAT industrial bus control system, taking 3 IO modules in series as an example, each IO module is a slave station unit, and the series structure includes: a first IO module 801, a second IO module 802, a third IO module 803, a first power cable 804 connecting in series other bus slave units and the first IO module 801, a first network communication cable 805 connecting in series other bus slave units and the first IO module 801, a second power cable 806 connecting in series the first IO module 801 and the second IO module 802, a second network communication cable 807 connecting in series the first IO module 801 and the second IO module 802, a third power cable 808 connecting in series the first IO module 801 and the second IO module 802, and a third network communication cable 809 connecting in series the first IO module 801 and the second IO module 802; during connection, one end of a first power cable 804 is inserted into a power output port of other slave station units or directly connected into an electric control cabinet, and the other end of the first power cable is inserted into a power input port of the first IO module 801; one end of a second power cable 806 is inserted into a power output port of the first IO module 801, and the other end is inserted into a power input port of the second IO module 802; one end of a third power cable 808 is inserted into a power output port of the second IO module 802, and the other end is inserted into a power input port of the third IO module 803; one end of a first network communication cable 805 is inserted into a network communication output port of another slave unit or a network communication output port of a master station, and the other end is inserted into a network communication input port of the first IO module 801; one end of a second network communication cable 807 is inserted into a network communication output port of the first IO module 801, and the other end is inserted into a network communication input port of the second IO module 802; a third network communication cable 809 is inserted at one end into a network communication output port of the second IO module 802, and at the other end into a network communication input port of the third IO module 803.
The power supply system is provided with a 24VDC power supply input interface and a 24VDC power supply output interface, and on one hand, the power supply system is used for supplying power for the working power of an IO module and the power of other IO modules connected with the IO module; on the other hand, the 24VDC power supply of the power input interface of the IO module is connected to the IO input terminal and the IO output terminal circuit, and is used for supplying power to sensors such as an input terminal button, a proximity switch, a limit switch, a photoelectric switch, optical fiber detection, air pressure detection, etc., and an output terminal electromagnetic valve, a signal indicator lamp, an alarm lamp, etc. Because the EtherCAT network communication is adopted, the acquisition and control of all on-site IO signals can be realized through one network cable. Industrial field bus distributing type IO power supply and network communication form networked distribution system, need not all to insert main electric cabinet like traditional mode IO power cord, signal line again, and the distribution is more convenient, labour saving and time saving.
For an electrical engineer, different electronic components are generally selected according to a field process when the type is selected, for a digital quantity signal, for example, sensors such as a photoelectric switch and a proximity switch have a difference between a PNP type and an NPN type, and the PNP and NPN type sensors output two states by utilizing saturation and cutoff of a triode, belong to switch type sensors, but output signals are opposite, namely, a high level and a low level. If the field selection does not match the actual use conditions, it is troublesome. The input/output port provided by the invention can flexibly configure wiring modes, can be compatible with a PNP type sensor and an NPN type sensor at the same time, and can be flexibly wired by a user according to the field condition.
According to the invention, a single IO module supports 8-path digital input signal acquisition and 8-path digital output signal control, a plurality of IO module buses are supported to be connected in series, and each input signal and each output signal have corresponding state indicator lamps to display states. The user can freely expand, and the expansion quantity, the installation position and the like can be freely configured according to the specific conditions on site, and the system is flexible and convenient.
The IO modules are based on EthetCAT communication, real-time performance is high, responsiveness is fast, safety and reliability are achieved, each on-site IO module is sequentially connected in series to form an EtherCAT network topological structure, each IO module is an EtherCAT slave station, and the EtherCAT master station acquires the address of each EtherCAT slave station, so that each on-site IO signal is acquired and controlled in real time, and network communication is achieved. The EtherCAT bus has the advantages of completely conforming to the Ethernet standard, wide adaptability, high efficiency, short refreshing period, good synchronization performance, no need of belonging to a subnet, having various application layer protocol interfaces to support various industrial equipment row rules and the like. The real-time Ethernet protocol is very suitable for application occasions requiring rapid control, and can really apply the Ethernet to a sensor/actuator level. The EtherCAT protocol itself decides that it supports almost any topology type, including line, tree, star, etc., and is not limited by the number of cascaded switches or hubs.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. An industrial bus IO module based on EtherCAT, comprising: a housing (2); an output port (4) is arranged on one side of the top of the shell (2), and an input port (5) is arranged on the other side of the top of the shell; a bus output port (6), a bus input port (7), a power output port (8) and a power input port (9) are respectively arranged on one side surface of the shell (2);
the inside of shell (2) sets up IO module electrical structure, IO module electrical structure includes: an EtherCAT communication physical layer unit (301), an input unit (302), an output unit (303), and a power supply unit (304); the input unit (302) is connected with the input port (5), and the output unit (303) is connected with the output port (4).
2. The EtherCAT-based industrial bus IO module according to claim 1, wherein the EtherCAT communication physical layer unit (301) comprises: an input communication physical layer and an output communication physical layer; the bus input port (7), the input network transformer (401), the input network transceiver (402) and the EtherCAT microprocessor (403) form an input communication physical layer of a bus IO module; the EtherCAT microprocessor (403), the output network transceiver (404), the output network transformer (405) and the bus output port (6) form an output communication physical layer of the bus IO module.
3. The EtherCAT-based industrial bus IO module according to claim 1, wherein the input unit (302) comprises a first optical coupling isolation circuit U8 and a logic conversion circuit; a first capacitor C45 and a first resistor R79 are connected in parallel and then connected in series between a first terminal and a second terminal of a first light-coupled isolation circuit U8, a second resistor R71 is connected in series on the first terminal of the first light-coupled isolation circuit U8, a second capacitor C53 is connected in series between a third terminal and a fourth terminal of the first light-coupled isolation circuit U8, and a fourth resistor R87 is connected in series on the fourth terminal of the first light-coupled isolation circuit U8.
4. The EtherCAT-based industrial bus IO module according to claim 1, wherein the output unit (303) comprises a transistor driver chip circuit U17 and a relay control circuit J21, a signal circuit RA _ C0 is connected on the 1B terminal of the transistor driver chip circuit U17, a signal circuit RA _ C0N0 is connected on the 1C terminal of the transistor driver chip circuit U17; a signal circuit RA _ C0N0 is connected in series with a first terminal of the relay control circuit J21, a signal circuit 5V voltage circuit VDD5 is connected in series with a second terminal of the relay control circuit J21, a signal circuit RA00 is connected in series with a third terminal of the relay control circuit J21, and a signal circuit RA0 is connected in series with a fourth terminal of the relay control circuit J21; the signal circuit RA _ C0 connected to the 1B terminal of the transistor driver chip circuit U17 drives the coil between the first and second terminals of the relay control circuit through the transistor driver chip circuit U17, so that the third and fourth terminals of the relay control circuit are turned on.
5. EtherCAT-based industrial bus IO module according to claim 1,
the connection mode of the input port (5) is as follows: the wiring pin definition of the input port (5) comprises a 24VDC input port, a PGND input port, a DDIN0 input port and a DDIN00COM input port; the 24VDC input port and the PGND input port provide a power supply for an external sensor on one hand, and provide a short-circuit voltage for a DDIN00(COM) input port on the other hand; if the COM end needs 24VDC, the DDIN00COM input port is short-circuited with the 24VDC input port; if the COM end needs PGND, the DDIN00COM input port is in short circuit with the PGND input port;
the output port (4) is connected in a wiring mode: the wiring pin definition of the output port (4) comprises a 24VDC output port, a PGND output port, a PA00 output port and a PA0 output port; the 24VDC output port and the PGND output port provide a power supply for an external execution mechanism on one hand, and provide short-circuit voltage for the relay control circuit on the other hand; if the relay control circuit needs to enable the high-level output, the output port of the PA00 is in short circuit with the output port of the 24 VDC; if the relay control circuit needs to enable the low level output, the output port of the PA00 is in short circuit with the output port of the PGND.
6. The EtherCAT-based industrial bus IO module according to claim 1, characterized in that a through mounting screw hole (1) is arranged on the top of the housing (2), and the mounting screw hole (1) is used for fixing the housing (2) in cooperation with a screw.
7. EtherCAT-based industrial bus IO module according to claim 1, characterized in that a rail clip (202) is fixed to the bottom of the housing (2), the rail clip (202) being used to fix the position of the housing (2).
8. EtherCAT-based industrial bus IO module according to claim 1, characterized in that a plurality of said output ports (4) are adjacently arranged along a same straight line and a plurality of said input ports (5) are adjacently arranged along a same straight line.
9. EtherCAT-based industrial bus IO module according to claim 1, characterized in that the top of the housing (2) is further provided with: the system comprises a slave station state indicating lamp (10), a slave station error indicating lamp (11), a bus output connection state indicating lamp (12), a bus input connection state indicating lamp (13), a bus output hundred-million speed mode indicating lamp (14) and a bus input hundred-million speed mode indicating lamp (15).
10. EtherCAT-based industrial bus IO module according to claim 1,
the IO modules are connected in series, one end of a power supply cable is inserted into a power supply output port of other slave station units or directly connected into the electric control cabinet, the other end of the power supply cable is inserted into a power supply input port of the next-stage IO module, one end of a network communication cable is inserted into a network communication output port of other slave station units or directly connected into a network communication output port of the master station, and the other end of the network communication cable is inserted into a network communication input port of the next-stage IO.
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