CN101042582A - Programmable and configurable remote I/O module with field bus interface - Google Patents
Programmable and configurable remote I/O module with field bus interface Download PDFInfo
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- CN101042582A CN101042582A CN 200710039889 CN200710039889A CN101042582A CN 101042582 A CN101042582 A CN 101042582A CN 200710039889 CN200710039889 CN 200710039889 CN 200710039889 A CN200710039889 A CN 200710039889A CN 101042582 A CN101042582 A CN 101042582A
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Abstract
This invention relates to one programmable match remote I/O module with spot bus interface, which comprises controller module, digital I/O module, analogue I/O module and power module, wherein, the power module is connected to the main control module for 5V and 24V direct power; the main controller module Devicenet interface is connected to third station; the main controller module comprises ARM chip LPC2292, memory, RS485 interface circuit, CAN receiver, I/O inner extensive bus interface circuit, point address set circuit and reset circuit; I/O module comprises main chip CPLD, digital volume, analogue chip, input and output interface. This invention has order analysis program and controller program.
Description
Technical field
The present invention relates to a kind of programmable and configurable remote I/O, belong to field-bus interface configurable technical field able to programme with field-bus interface.
Background technology
Along with the development of infotech, the trend intelligent, information-based, that networking becomes modern industry control.Industrial-controlled general line open since the last century the eighties develops rapidly, and the control technology of decentralised control that connects by network and embedded device is progressively full-fledged on this basis.
Remote I/O is exactly a series products that develops under this condition, and open and general is its principal character.It should meet open bus protocols (as Devicenet, Profibus-DP etc.), can directly insert corresponding network, the Programmable Logic Controller that can provide with other manufacturers, host computer collaborative work.It can decentralized configuration connect local input/output signal at the scene, can be connected to the control that controller is realized requirement by network, and the opening of stipulations makes it can be connected to the various controllers of the compliant of any other manufacturer.Thereby this just versatility makes the remote I/O product can become independently, and product is developed rapidly, becomes the important basic product of industrial control field.
Though last century, remote I/O appearred in the eighties, all be the long-range decentralized configuration that is used for the I/O module as the special accessories of PLC, it uses special-purpose communication protocol to be connected with main frame.At this moment the nineties just becomes independent used product along with the remote I/O that passes through open bus connection of the development appearance of fieldbus.
In recent years the remote I/O product has two important development, and is promptly configurable and able to programme.The configurable number of modules of the I/O that a remote I/O node is connected and the specification of being meant (inputs or outputs, signal level, switching value or analog quantity etc.) can be in specialized range independent assortment, to adapt to the requirement at different scenes, also can adapt to different bus protocolses simultaneously by the communication controler of selecting to insert.Able to programme being meant at remote node equipped control function able to programme, programming by the user just can realize control in this locality, and do not need picture remote I/O in the past whole input states must be sent to main frame, obtain output state by the control program in the main frame and pass to the control that distant station is realized requirement.Intuitively local as can be seen control is more direct, quicker, more economical, more meets the trend of technical development.But realize these two the progressive a series of technological difficulties of solution that need, this also is this project goal.Realize that in fact the remote I/O of these two progress has had both the function of long-range connection and control able to programme, be equivalent to have the small PLC of network concatenation ability, therefore can be also as independently controller use.
Summary of the invention
The object of the present invention is to provide a kind of programmable and configurable remote I/O with field-bus interface, this remote I/O is configurable able to programme, can the various dissimilar I/O modules of independent assortment, realize the I/O automation control system of multiple scale.
For achieving the above object, solution of the present invention is: this programmable and configurable remote I/O comprises main controller module, digital quantity I/O module, analog quantity I/O module, power module; Power module divides 5V power supply, 24 power supplys, connects main controller module, I/O module respectively; The Devicenet interface connects the third party main website in the main controller module; Main controller module control I/O module.
For realizing that configurable functionality the present invention able to programme also designs ladder diagram and order number program, main controller module, I/O module controls software.
Main controller module
Main devices comprises: ARM chip LPC2292, the ARM chip is integrated with RAM and the 256KFLASH of 16K, the high-speed SRAM storer of 64K*16 bit is used to deposit user-variable, the FLASH storer of 128K*8 bit is used to deposit user program, the RS485 interface circuit, CAN transceiver, I/O internal extended bus interface circuit, node address initialization circuit, reset circuit, running LED, direct supply.
The I/O module
Main devices comprises: main chip CPLD, digital quantity, analogue chip, IO interface, status indicator lamp, DC power supply circuit.
Analog quantity I/O module
Main devices comprises: master chip P89LPC931, AD or DA chip, light-coupled isolation, IO interface, status indicator lamp
The realization of multiple I/O module expanded function. by the high-speed internal bus realization master controller of design voluntarily and the exchanges data between the serial I/O module, various I/O modules adopt the uniform communication interfaces, but number of I how wide in variety/O module freedom and flexibility combination;
Master controller again by fieldbus (external bus) with third party's main station unit (being generally PLC or PC) exchange message, just realized the information interaction of main station unit with the I/O module, realized having the function of fieldbus remote I/O.
The characteristics of above-mentioned solution are:
(1) core technology of Programmable Logic Controller
(a) ladder diagram, instruction list linguistic interpretation/compiler technologies;
(b) user PLC program interpreter, performer technology;
(c) realization of FPGA (Field Programmable Gate Array) control function;
(d) follow the programmable instruction set of IEC61131-3, the research and development of control algolithm;
(e) reliability of system operation, stability, controller ensures the security of custom system under failure condition.
(2) user program software
SEARI-I/O-PRO host computer detail programming software systems.This software provides easy-to-use visual man-machine interface based on main flow WINDOWS window platform and advanced windowing software.
Conventional programming and debugging pull and can finish immediately by mouse.
(3) configurable technology realizes that the module independent assortment inserts
Designed the high-speed internal module level communication bus that is used for the expansion of I/O module, realize different I/O module independent assortment and insert able to programme, configurable controller, the controller product of realizing various scales is supporting, research and develop relevant host computer user configuration software simultaneously, made things convenient for user's independent assortment configuration I/O module.
(4) field bus technique
Research up-to-date agreement of DeviceNet and computer software and hardware are realized technology, study the state-of-the-art technology in Fieldbus Control field, research and develop the field bus communication interface of multiple high-performance, high stability, high reliability.
(5) high-quality embedded software
Different with the software based on PC, the characteristics of embedded software maximum are very high to requirements such as the times of code occupation space and operation, and for the demanding occasion of real-time, the execution efficient of code is particularly important.Use 32 industrial ARM microprocessors, research and development are based on the industrial embedded software platform of ARM microprocessor, research and development Embedded PLC programmed operating system software platform, research and develop the drive software based on the multiple embedded device of this software platform simultaneously, the characteristics of whole software operational system are high real-time, high reliability.
The Fieldbus Control device of beneficial effect of the present invention: programmable I/O can be realized the control on the spot to the remote I/O module, its communication function decentralized control can be good at supporting that the upper PLC in a distant place or PC implement long-range interlocked control to the long-range I/O of this place, local control is carried out the transmission burden that pre-service has reduced fieldbus to signal, has accelerated the response speed of system simultaneously; When fieldbus breaks down, can make response by preset program with the communication controler of fieldbus function able to programme, move local control program, distributed control has reduced the risk of bus failure; The communication controler that adds the FPGA (Field Programmable Gate Array) control function has simultaneously become the Fieldbus Control device with independent control ability, with this product by rely on higher controller the remote I/O unit promote to can also be as the simple independent controller of controlling, effectively promoted the function of product, expand the market adaptability of product, had remarkable economic efficiency.
Below in conjunction with drawings and Examples to the present invention's detailed explanation of making comparisons.
Description of drawings
Fig. 1 is that programmable and configurable remote I of the present invention/O module constitutes block diagram;
Fig. 2 is that the main controller module of programmable and configurable remote I of the present invention/O module constitutes block diagram;
Fig. 3 is that the I/O module of programmable and configurable remote I of the present invention/O module constitutes block diagram;
Fig. 4 is the ladder diagram order number format chart of programmable and configurable remote I of the present invention/O module;
Fig. 5 is the ladder diagram order code interpretive routine operational flow diagram of programmable and configurable remote I of the present invention/O module;
Fig. 6 is the program execution flow figure of the master controller of programmable and configurable remote I of the present invention/O module;
Fig. 7 is the program execution flow figure of the analog quantity I/O module of programmable and configurable remote I of the present invention/O module.
Embodiment
With reference to Fig. 1, this is that programmable and configurable remote I of the present invention/O module constitutes block diagram.
As shown in the figure, programmable and configurable remote I/O module constitutes, and comprises main controller module 2, I/O module 3, analog quantity I/O4, power module 1; Power module divides 5V direct supply, 24V direct supply, connects main controller module 2, I/O module 3 respectively, and the Devicenet interface connects the third party main website in the main controller module 2; Main controller module 2 control I/O modules 3.
Main devices comprises: ARM chip LPC2292, the ARM chip is integrated with RAM and the 256KFLASH of 16K, the high-speed SRAM storer of 64K*16 is used to deposit user-variable, the FLASH storer of 128K*8 is used to deposit user program, the RS485 interface circuit, CAN transceiver, I/O internal extended bus interface circuit, node address initialization circuit, reset circuit, running LED, direct supply.
I/O module 3
Main devices comprises: main chip CPLD, digital quantity, analogue chip, IO interface, status indicator lamp, DC power supply circuit.
Analog quantity I/O module 4
Main devices comprises: master chip P89LPC931, AD or DA chip, light-coupled isolation, IO interface, state indication.
1 fen 5V direct current supply line of power module, 24 direct current supply lines.
Described main controller module 2 again by fieldbus (external bus) with third party's main station unit (being generally PLC or PC) exchange message, just realized the information interaction of main station unit with the I/O module, realized having the function of fieldbus remote I/O.
The realization of described programmable functions is by the ladder diagram of design voluntarily, the instruction repertorie that meets IEC61131-3 programming language standard that instruction list linguistic interpretation/compiler run user is write.
User program is realized the programming Control to the I/O resource by the resource of master controller acquisition I/O module.
The programming language of " able to programme " adopts the host computer programming software that meets the IEC61131-3 standard of design voluntarily to carry out program design and on-line debugging.
Configurable programmable communication controller can the various dissimilar I/O modules of independent assortment, realize the I/O automation control system of multiple scale, counting when needs increase system need not rewiring, and only needing increases new I/O module on existing system, very convenient.The I/O module comprises 5 types of digital quantity input, digital quantity output, analog quantity input, analog quantity output, electrical measurement modules etc.
The system that this project of use achievement in research constitutes, the user can realize this locality control of system by the communication controler programmable functions, also can carry out Long-distance Control by the field-bus interface that communication controler has.When using local control, change steering logic and need not to change system's existing structure, only need programme again according to new requirement to controller gets final product.When using Long-distance Control, the user can select the DeviceNet bus interface, and the convenient field bus system that inserts satisfies the requirement of multiple bus system.
The Fieldbus Control device of programmable I/O can be realized the control on the spot to the remote I/O module, its communication function decentralized control can be good at supporting that the upper PLC in a distant place or PC implement long-range interlocked control to the long-range I/O of this place, local control is carried out the transmission burden that pre-service has reduced fieldbus to signal, has accelerated the response speed of system simultaneously; When fieldbus breaks down, can make response by preset program with the communication controler of fieldbus function able to programme, move local control program, distributed control has reduced the risk of bus failure; The communication controler that adds the FPGA (Field Programmable Gate Array) control function has simultaneously become the Fieldbus Control device with independent control ability, with this product by rely on higher controller the remote I/O unit promote to can also be as the simple independent controller of controlling, effectively promote the function of product, expanded the market adaptability of product.
The Fieldbus Control utensil of programmable I/O has the characteristics of control, field-programmable on the spot, is representing the development trend of fieldbus dcs.
Programmable I/O Fieldbus Control device is made up of Devicenet fieldbus adapter able to programme and serial I/O module, is fit to very much multibus remote I/O product application scenario.
Bus adapter is by internal bus homologous series I/O module communication swap data; Bus adapter by the same main station unit of Devicenet fieldbus (being generally PLC or PC) exchange message, has been realized the information interaction of main station unit with the I/O module again, has realized having the function of fieldbus remote I/O.
Cost is low, the I/O module is capable of being combined and the flexible of use is the sharpest edges of configurable I/O module.
The principal feature of foregoing invention is:
(1), have the DeviceNet bus interface, the product main performance is followed the IEC61131-2 standard-required;
(2), language able to programme meets the IEC61131-3 standard, two kinds of programming language support ladder diagram and instruction lists;
(3) to the open programing function of user, user's freely programmable is realized this locality control of system, improves the reliability and the response speed of distributed system;
(4) on the I/O module that connects, any one the digital quantity output on it, analog quantity output point can be configured to local control and Long-distance Control mode of operation separately: under local control model, output point is subjected to user's programmed control; Under distance control mode, output point is controlled by the fieldbus main website.Local control able to programme of I/O and Long-distance Control collaborative work can realize upper PLC or PC with a distant place implement long-range interlocked control to the long-range I/O of this place function;
(5) can connect 8 I/O modules dissimilar, that difference is counted at most by internal bus;
(6) but the multiple I/O module that autoscan connects;
(7) can provide current I/O modules configured situation and state to main website;
(8) have the DeviceNet field-bus interface and can be used as long-range I/O slave station use.
The key technical indexes of Devicenet fieldbus adapter able to programme is as follows:
| Can connect 8 input/output modules dissimilar, that difference is counted at most; | |
| The PLC compiler and the operational system that meet the ladder diagram and the instruction predicative language of IEC61131-3 international norm; | |
| Realize that the fieldbus remote I/O refreshes the coordination technique between refreshing with local control I/O; | |
| Internal power source voltage: DC5V+5% ,-5%; | I/O supply voltage: DC24V+10% ,-15%; |
| Working temperature: 0～55 ℃; | Storing temperature :-20～75 ℃; |
| Humidity: 10%～90% (no condensation); | |
| DeviceNet: meet DeviceNet protocol specification 2.0; | Baud rate: 125K, 250K, 500K; |
| Maximum total line length: 100m～500m depends on transfer rate; | |
Series I/O module comprises digital quantity input module, digital quantity output module, analog quantity load module, analog output module, and the key technical indexes is as follows:
| The digital quantity input: | |
| ON input current: 〉=6mA (DC24V); | OFF input current:＜1mA |
| Input ON time-delay :≤1.5ms; | Input OFF time-delay :≤1.5ms |
| Digital quantity output: | |
| Output current :≤500mA/ point; | Output conduction voltage drop :≤1.2V (I/O=500mA); |
| Output ON time-delay :≤1.5ms; | Output OFF time-delay :≤1.5ms; |
| The analog quantity input: | |
| The difference input, input signal can be configured to :-10V～+ 10V ,-5V～+ 5V, 0/1～5V; | |
| Resolution: 12; | Switching time: 5ms/ point; |
| Precision: ± 0.8%FS; | |
| Analog quantity output: | |
| Output classification: 0～5V, 1～5V, 4～20mA, 0～20mA ,-10v～10v; | |
| Output loading capability: voltage-type 〉=5K Ω, current mode≤600 Ω; | |
| Resolution: 12; | Precision: ± 0.8%FS; |
| Conversion time: 5ms/ point; | |
(1) core technology of Programmable Logic Controller
(a) ladder diagram, instruction interpretation/compiler technologies; (b) user PLC program interpreter, performer technology; (c) realization of FPGA (Field Programmable Gate Array) control function; (d) follow the programmable instruction set of IEC61131-3, the research and development of control algolithm; (e) reliability of system operation, stability, controller ensures the security of custom system under failure condition.
(2) user program software
Research and development SEARI-I/O-PRO host computer detail programming software systems.This software provides easy-to-use visual man-machine interface based on main flow WINDOWS window platform and advanced windowing software.Conventional programming and debugging pull and can finish immediately by mouse.
(3) configurable technology realizes that the module independent assortment inserts
Designed the high-speed internal module level communication bus that is used for the expansion of I/O module, realize different I/O module independent assortment and insert able to programme, configurable controller, the controller product of realizing various scales is supporting, research and develop relevant host computer user configuration software simultaneously, made things convenient for user's independent assortment configuration I/O module.
(4) field bus technique
Research up-to-date agreement of DeviceNet and computer software and hardware are realized technology, study the state-of-the-art technology in Fieldbus Control field, research and develop the field bus communication interface of multiple high-performance, high stability, high reliability.
(5) exploitation of high-quality embedded software
Different with the software based on PC, the characteristics of embedded software maximum are very high to requirements such as the times of code occupation space and operation, and for the demanding occasion of real-time, the execution efficient of code is particularly important.Use 32 industrial ARM microprocessors, research and development are based on the industrial embedded software platform of ARM microprocessor, research and development Embedded PLC programmed operating system software platform, research and develop the drive software based on the multiple embedded device of this software platform simultaneously, the characteristics of whole software operational system are high real-time, high reliability.
Realization for programmable functions, the ladder diagram of design, and designed command interpreter, its operational flow diagram is as follows: by [beginning] 101 beginnings, next coming in order are to [getting the command code of 2 bytes] 102, [getting the order format of 1 byte] 103, [parameter that get how many bytes is calculated in the description according to command code and order format] 104, [according to command code/parameter operating instruction] 105, up to [individual instructions end of run] 106.
The program execution flow figure of configurable I able to programme/O controller that has the DeviceNet field-bus interface is as follows:
From [power-up initializing] 201, to [internal affairs processing] 202, [explaining the executive routine trapezoid figure program] 203, [processing of program performance period] 204, [I/O refreshes] 205, [with the long-range master station communication of DeviceNet] 206, [communication of RS232 host computer] 207, turn back to [internal affairs processing] 202 then successively.
The program execution flow figure of digital quantity I/O module is as follows:
From [power-up initializing] 301, arrive [waiting for that controller sends order] 302, [the I/O data are upgraded in the order of processing controller] 303 successively, turn back to [waiting for that controller sends order] 302 then.
The program execution flow figure of analog module is as follows:
From [power-up initializing] 401, arrive [waiting for that controller sends order] 402, [the I/O data are upgraded in the order of processing controller] 403 successively, turn back to [waiting for that controller sends order] 402 then.
Though the present invention describes with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment is used for illustrating the present invention; should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense; so be not as limitation of the invention; as long as in connotation scope of the present invention, to the variation of above-described embodiment, the protection domain that distortion all will fall into claim of the present invention.
Claims (9)
1, the programmable and configurable remote I/O module of band field-bus interface comprises controller module and I/O module, and it is characterized in that: described programmable and configurable remote I/O module also comprises digital quantity I/O module, analog quantity I/O module and power module;
Described power module divides 5V direct supply, 24 direct supplys, connects main controller module, I/O module respectively; The Devicenet interface connects the third party main website in the main controller module, main controller module control I/O module.
2, programmable and configurable remote I as claimed in claim 1/O module, it is characterized in that: described main controller module, comprise ARM chip LPC2292, the ARM chip is integrated with RAM and the 256KFLASH of 16K, the high-speed SRAM storer of 64K*16 bit, the FLASH storer of 128K*8 bit, the RS485 interface circuit, CAN transceiver, I/O internal extended bus interface circuit, node address initialization circuit, reset circuit, running LED, direct supply.
3, programmable and configurable remote I as claimed in claim 1/O module is characterized in that: described I/O module comprises main chip CPLD, digital quantity, analogue chip, IO interface, status indicator lamp, DC power supply circuit.
4, as claim 1 or 3 described programmable and configurable remote I/O modules, it is characterized in that: described I/O module, it is multiple I/O module, by the exchanges data between internal bus realization master controller and the serial I/O module, various I/O modules adopt the uniform communication interface, but number of I how wide in variety/O module freedom and flexibility combination.
5, programmable and configurable remote I as claimed in claim 1/O module is characterized in that: described analog quantity I/O module comprises master chip P89LPC931, AD or DA chip, light-coupled isolation, IO interface, status indicator lamp.
6, programmable and configurable remote I as claimed in claim 1/O module, it is characterized in that: described able to programme, be to have command interpreter, its operational scheme is undertaken by following step: by [beginning] 101 beginnings, next coming in order are to [getting the command code of 2 bytes] 102, [getting the order format of 1 byte] 103, [parameter that get how many bytes is calculated in the description according to command code and order format] 104, [according to command code/parameter operating instruction] 105, up to [individual instructions end of run] 106.
7, programmable and configurable remote I as claimed in claim 1/O module is characterized in that: the program of described configurable I able to programme/O controller, and its process step is as follows:
From [power-up initializing] 201, to [internal affairs processing] 202, [explaining the executive routine trapezoid figure program] 203, [processing of program performance period] 204, [I/O refreshes] 205, [with the long-range master station communication of DeviceNet] 206, [communication of RS232 host computer] 207, turn back to [internal affairs processing] 202 then successively.
8, programmable and configurable remote I as claimed in claim 1/O module is characterized in that: the program of described configurable I able to programme/O controller, and its process step is as follows:
From [power-up initializing] 301, arrive [waiting for that controller sends order] 302, [the I/O data are upgraded in the order of processing controller] 303 successively, turn back to [waiting for that controller sends order] 302 then.
9, programmable and configurable remote I as claimed in claim 1/O module is characterized in that: the program of described configurable I able to programme/O controller, and its process step is as follows:
From [power-up initializing] 401, arrive [waiting for that controller sends order] 402, [the I/O data are upgraded in the order of processing controller] 403 successively, turn back to [waiting for that controller sends order] 402 then.
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