CN102591263B - I/O (Input/Output) intelligent unit applied to DCS ( Data Communication System) system - Google Patents
I/O (Input/Output) intelligent unit applied to DCS ( Data Communication System) system Download PDFInfo
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Abstract
The invention discloses an I/O (Input/Output) intelligent unit applied to a DCS (Data Communication System) system, which aims to solve the technical problem of providing the I/O intelligent unit applied to the DCS system. The I/O intelligent unit applied to the DCS system is convenient to maintain and change. The technical scheme of the I/O intelligent unit is that the I/O intelligent unit mainly consists of an I/O intelligent control module, a system functional module of single point collection and a universal base. The I/O intelligent control module and the system functional module of single point collection are arranged on the universal base. The universal base provides a bus, a system power supply and an I/O terminal of field connection for the I/O intelligent control module. The I/O intelligent control module realizes data collection, output, and signal conditioning to the system functional module of single point collection through the bus and exchanges data with external equipment. The I/O intelligent unit has the advantages that: 1, related influence caused by fault of a functional module is avoided, and hot plug is supported, so that the I/O intelligent unit applied to the DCS system is convenient to install and maintain; and 2, the module developed in the invention is a functional module of the system aiming at single point collection, thereby improving the agility and stability of the system.
Description
Technical field
The present invention relates to a kind of system function module, relate in particular to a kind of I/O unit of the DCS of being applied to system.
Background technology
The DCS system is the day by day complicated complex control system of arising at the historic moment required along with the continuous rise of the modern large scale industry production automation and process control, it is the product that computer technology, system control technology, network communications technology and multimedia technology combine, and has advanced control strategy, pattern manipulation interface and the online configuration instrument in real time controlled; Window close friend's man-machine interface and powerful communication function can be provided, and are that complete process is controlled, the state-of-the-art facility of process management.
The DCS system mainly contains the compositions such as field control station (I/O station), data communication unit, human-machine interface unit (OPS of operator station, engineer station ENS).Wherein, field control station is the core of control system, and power supply module, CPU control module, bus mother board or the machine cage, communication unit and the I/O unit that generally comprise redundancy form.According to statistics, show, the problem 90% that the control system of traditional structure occurs occurs in the I/O unit.And general integrated 8 Lu Huo 16 tunnels, the block I/O unit functional module on 32 tunnels even, once a certain road functional module breaks down, maintain and replace will have influence on whole I/O unit, bring impact in a big way to whole control system thus.
In integrated I/O unit, except integrated system function module, also have processing unit, communication unit, power unit, any one fault, all can bring maintenance and the replacing of I/O whole unit, and then affect the normal operation of systemic-function.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of I/O intelligent cell that is applied to easily the DCS system of safeguarding and change.
For addressing the above problem, the technical solution used in the present invention mainly is comprised of the system function module of I/O intelligent control module, single-point acquiring, general pedestal, the system function module of described I/O intelligent control module, single-point acquiring is loaded on general pedestal, general pedestal provides the I/O terminal of bus, system power supply and field wiring for the I/O intelligent control module, and described I/O intelligent control module is realized data acquisition, output, signal condition and and the external unit swap data to the system function module of single-point acquiring through bus.
The described I/O intelligent cell that is applied to the DCS system, is characterized in that the system function module of described single-point acquiring comprises single-point AI functional module, single-point AO functional module, single-point DI/DO functional module, single-point PI module, two-way SOE sequence of events recording module.
Data storage EEPROM, WDT circuit that described single-point AI functional module comprises module microcontroller, DC/DC change-over circuit, system bus interface circuit, signal terminal, wave filter, type selecting circuit, correcting circuit, programmable amplifier, analog to digital converter and is connected with the module microcontroller, the external unit input signal to the module microcontroller, carries out signal processing by the module microcontroller through signal terminal, wave filter, type selecting circuit, correcting circuit, programmable amplifier, analog to digital converter.
Described single-point AO functional module comprises module microcontroller, DC/DC change-over circuit, system bus interface circuit, analog to digital converter, converter, break detection circuit, communication driving circuit, signal terminal and the data that are connected with module microcontroller storage EEPROM, WDT circuit, described module microcontroller by analog to digital converter, converter, break detection circuit, communication driving circuit by signal to signal terminal.
Data storage EEPROM, WDT circuit that described single-point DI/DO functional module comprises module microcontroller, DC/DC change-over circuit, system bus interface circuit, signal terminal, holding circuit, driving circuit, photoelectric isolating circuit and is connected with the module microcontroller, the external unit input signal to the module microcontroller, carries out signal processing by the module microcontroller through signal terminal, holding circuit, driving circuit, photoelectric isolating circuit; The module microcontroller is exported the signal of handling well through photoisolator, driving circuit, holding circuit to signal terminal.
Described single-point PI module comprises data storage EEPROM, the WDT circuit that module microcontroller, DC/DC change-over circuit, system bus interface circuit, signal terminal, holding circuit, impedance are selected circuit, photoelectric isolating circuit, signal transformation circuit and be connected with the module microcontroller; the external unit input signal selects circuit, photoelectric isolating circuit, signal transformation circuit to the module microcontroller through signal terminal, holding circuit, impedance, by the module microcontroller, carries out the signal processing.
Described two-way SOE sequence of events recording module comprises high speed microprocessor, the communicating circuit be connected with high speed microprocessor respectively, data-carrier store, WDT circuit, condition indication circuit and, by the sampling channel of high speed data bus and high speed microprocessor communication, described sampling channel is provided with holding circuit, photoelectric isolating circuit, signal transformation circuit.
The described I/O intelligent cell that is applied to the DCS system, is characterized in that described DC/DC change-over circuit system bus interface circuit is provided with power isolation circuit.
The described I/O intelligent cell that is applied to the DCS system, the system function module that it is characterized in that described single-point acquiring also is provided with a modular cartridge that is mated installation, described modular cartridge both sides are provided with erection column, and the system function module of single-point acquiring is connected and fixed by erection column and general pedestal.
The described I/O intelligent cell that is applied to the DCS system, is characterized in that described modular cartridge both sides are provided with louvre.
The present invention has following beneficial effect:
1, evade the related impact that the Breakdown Maintenance because of a certain road functional module causes, and supported hot plug, facilitated installation and maintenance.
2, the module of the present invention's exploitation is a kind of system function module for single-point acquiring, has improved dirigibility and the stability of system.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
The composition structural drawing that Fig. 1 and Fig. 9 are I/O intelligent cell of the present invention.
The composition structural drawing that Fig. 2 is single-point AI functional module of the present invention.
The composition structural drawing of Fig. 3 single-point AO functional module.
The composition structural drawing of Fig. 4 single-point DI/DO functional module.
The composition structural drawing of Fig. 5 single-point PI module.
The composition structural drawing of Fig. 6 two-way SOE sequence of events recording module.
The structural drawing that Fig. 7 is modular cartridge of the present invention.
The scheme of installation of the system function module that Fig. 8 is modular cartridge of the present invention and single-point acquiring.
Figure 10 is power isolation circuit circuit diagram of the present invention.
Embodiment
The DCS system architecture be take network as basis, is equipped with various functional unit, module and the assemblies that are articulated on network, realizes each several part co-ordination and data sharing, jointly completes various automatic control and information management function.DCS system architecture master is comprised of equipment such as field control station, operator station, engineer station, communication networks.
Field control station is the nucleus equipment of DCS system, and in order to the data sampling, control algorithm and the control output that realize industry spot, its main control unit is core, uses the control net that various I/O unit is coupled together.
As shown in Fig. 1 and Fig. 9, I/O of the present invention unit is mainly by I/O intelligent control module 1, the system function module 2 of single-point acquiring, general pedestal 3 forms, the system function module 2 of I/O intelligent control module 1 and single-point acquiring is loaded on general pedestal 3, general pedestal also provides bus and system power supply by bottom connector (not shown in FIG.) for the I/O intelligent control module, the I/O terminal of field wiring is provided simultaneously, the I/O intelligent control module is realized data acquisition and the output to the system function module 2 of single-point acquiring, signal condition and and main control unit swap data.
The system function module 2 of single-point acquiring designs based on dexterous bus SmartBus, flexible configuration single-point AI functional module 2-1, single-point AO functional module 2-2, single-point DI/DO functional module 2-3, single-point PI module 2-4, two-way SOE sequence of events recording module 2-5, reach flexible configuration, the on-the-spot purpose of adjusting, reducing spare part, maintain easily, reduce costs.As shown in Figure 7 and Figure 8; for the protection system functional module with facilitate system function module to install; the present invention also provides a modular cartridge 29 be equipped with system function module, and the modular cartridge both sides are provided with erection column 30, and system function module utilizes modular cartridge erection column and general pedestal 3 to be connected and fixed.The modular cartridge both sides are provided with louvre 31, can prevent excess Temperature in modular cartridge, affect system function module work, are that in addition the modular cartridge front end is provided with pilot lamp, and the state for the operation of Display System Function module, facilitate production test and engineering maintenance.
As shown in Figure 2, single-point AI functional module comprises module microcontroller 5, DC/DC change-over circuit 6, system bus interface circuit 4, signal terminal 7, wave filter 8, type selecting circuit 9, correcting circuit 10, programmable amplifier 11, analog to digital converter 12 and the data storage EEPROM13 be connected with the module microcontroller, WDT circuit 14, on-site signal enters through signal terminal 7, at first after filtering device 8 hardware filterings, switch selection according to the signal type type selecting circuit 9 of configuration subsequently, again through programmable amplifier 11, be converted to digital quantity signal to analog to digital converter 12, last module microcontroller 5 carries out relevant signal processing, can utilize correcting circuit 10 to carry out in real time temperature compensation and zero point and span calibration simultaneously, guarantee the accuracy of sampled data.DC/DC change-over circuit 6 is set in addition and can receives dissimilar stream voltage, system bus interface circuit 4 is set and is connected with dexterous bus SmartBus.The isolation fully for guaranteeing between module and system, between module and module, keep external disturbance outside of the door, also is provided with power isolation circuit 33 on DC/DC change-over circuit 6.
Module characteristic: 1, software arranges input signal types, range ability, warning message etc., and can online modification; 2, online self diagnosis, support burn out detection, and the indication of module running status, help user's Judging fault source; 3, self-tuing on line, can carry out zero point, gain compensation according to the variation of module working environment, automatically without the potentiometer manual synchronizing; 4, between module and system, isolation fully between module and module, external disturbance is kept outside of the door; Automatically carry out cold junction compensation when 5, thermocouple signal is inputted, open circuit detects; 6, distributing function alleviates quantities, reduces the fault point; 7, WDT circuit design, the assurance module is normally moved.
As shown in Figure 3, single-point AO functional module comprises module microcontroller 5, DC/DC change-over circuit 6, system bus interface circuit 4, analog to digital converter 12, converter 15, break detection circuit 16, communication driving circuit 17, signal terminal 7 and the data storage EEPROM13 be connected with the module microcontroller, WDT circuit 14, the simulation output order is transferred to module microprocessor 5 through dexterous bus SmartBus, module microcontroller 5 is processed conversion according to configuration parameter to the output data, and output to digital to analog converter 12 and carry out digital-to-analog conversion, analog voltage signal after conversion is through converter 15, and the break detection circuit 16 whether extremely disconnected through the line for judging on-site signal, and the communication driving circuit 17 that carries out the communication driving, finally by the current signal of crossing signal terminal 7 stable outputs.
Module characteristic: 1, the online configuration of output type, online modification; 2, online self diagnosis, support burn out detection, and the indication of module running status, help user's Judging fault source; 3, isolation fully between module and system, module and module, keep external disturbance outside of the door; 4,, when communication occur to be interrupted, can maintain normal operation and require to keep state or the preassigned result of user before fault according to configuration; 5, WDT circuit design, the assurance module is normally moved.
As shown in Figure 4; data storage EEPROM13, WDT circuit 14 that single-point DI/DO functional module comprises module microcontroller 5, DC/DC change-over circuit 6, system bus interface circuit 4, signal terminal 7, holding circuit 18, driving circuit 17, photoelectric isolating circuit 20 and is connected with the module microcontroller; module be take module microcontroller 5 as core, moves required relevant parameters and sets when software configures.The digital quantity input signal through signal terminal 7, rise overcurrent protection holding circuit 18, play driving circuit 17 that communication drives, sampled after the photoelectric isolating circuit 20 that carries out the photoelectricity isolation.Equally, the digital output signal exports field apparatus to through photoelectricity isolation, communication driving, overcurrent protection.The operation conditions of WDT circuit 14 charge of overseeing modular programs, when module is disturbed and the CPU that will reset in time after the program richochet, the assurance modular program is normally moved.
Module characteristic: 1, intelligent object microprocessor Design independently; 2, a module provides independent 2 railway digital amount passages simultaneously; 3, online self diagnosis, the indication of module running status, help user's Judging fault source; 4, adopt photoelectric isolation technology and digital filtering technique, external disturbance is kept outside of the door; While 5, the communicating interrupt fault occurring, still can maintain normal operation and require keep state before fault or the result of user's appointment according to configuration; 6, WDT circuit design, the CPU that can reset in time after the richochet of assurance modular program, recovery routine normally moves.
As shown in Figure 5; described single-point PI module 2-4 comprises data storage EEPROM13, the WDT circuit 14 that module microcontroller 5, DC/DC change-over circuit 6, system bus interface circuit 4, signal terminal 7, holding circuit 18, impedance are selected circuit 21, photoelectric isolating circuit 20, signal transformation circuit 22 and be connected with the module microcontroller; module is with module microcontroller 5 cores; the dexterous bus SmartBus of system bus interface circuit 4 access by standard, realize the data communication with I/O intelligent control module 1.On-site signal is through signal terminal 7; passage front-end protection circuit 18, photoelectric isolating circuit 20, signal is load module microprocessor 5 after signal transformation circuit 22 shapings; carry out signal sampling and frequency computation part by module microprocessor 5, convert the pulsed quantity signal to pure digi-tal amount signal.According to the engineering site needs, utilize impedance to select circuit 21 to realize 0-10mA, 4-20mA electric current, 12V, 4 kinds of input type settings such as 24V voltage.
The module operational factor is set by the user when software configuration, and is kept in module data storage EEPROM13, and the configuration information power down is not lost.The operation conditions of WDT circuit 14 Real-Time Monitoring module controls programs, will reset in time when module is disturbed while causing the program richochet, guarantee stability and the reliability of module.
Module characteristic: 1, single channel pulse signal input, frequency range 0～60kHz; 2, support software is selected the wide level input range of multi-signal, applied widely; 3, signal input photoelectricity isolation, isolation voltage is not less than 1500V; 4, online self diagnosis, reflect the module running status in time; 5, WDT circuit design, the assurance modular program is normally moved.
As shown in Figure 6; two-way SOE sequence of events recording module 2-5 comprises high speed microprocessor 25, the communicating circuit 28 be connected with high speed microprocessor 25 respectively, data-carrier store 27, WDT circuit 14, condition indication circuit 23 and the sampling channel 32 that passes through high speed data bus 24 and high speed microprocessor 25 communications, and described sampling channel 32 is provided with holding circuit 18, optically coupled isolation circuit 20, signal transformation circuit 22.Two-way SOE sequence of events recording module be take high speed microprocessor 25 as core, by the HSDB millisecond regularly, trigger sampling channel 32 state samplings, by each channel signal state variation is checked, trigger one time logout, and deposit relative Time To Event in sequence of events recording data-carrier store 27.Microprocessor utilizes the CNet network controller to receive event information inquiry and the recording clock synch command of external unit by communicating circuit 28, carry out self diagnosis simultaneously and send fortune condition indication circuit 23 by testing result, indication is when front module running status and communication condition.Holding circuit 18 on sampling channel 32, optically coupled isolation circuit 20, signal transformation circuit 22, carry out the optimization processes such as overcurrent protection, photoelectricity isolation, signal shaping to sampled signal.
Module characteristic: 1, module tenaculum electric heating plug, whether the automatic identification module of system is installed, and realizes plug and play; 2, adopting high speed microprocessor is master cpu, and SOE sequence of events recording time synchronized rate is less than 1ms, and the minimum interval between different event can reach 1ms; 3, the cell S OE sequence of events recording buffer zone maximum number of can holding the record is 256; 4,2 integrated road DI input channels, adopt photoelectric isolation technology, guarantees that between on-site signal and system, isolation voltage reaches 1500V; 5, support redundancy CNet communication network, communication speed 1Mbps; 6, the full isolation design of passage and interchannel, do not affect the normal operation of rest channels while making passage or signal fault;
7, module self overcurrent protection function, input when excessive because faults itself causes electric current when module, has self-protection function, and after fault is got rid of, module recovery works; 8, each control station can carry out the SOE record to 192 switching values, and each control station logout capacity is 10240.
Claims (4)
1. an I/O intelligent cell that is applied to the DCS system, it is characterized in that this I/O intelligent cell is mainly by I/O intelligent control module (1), the system function module of single-point acquiring (2), general pedestal (3) forms, described I/O intelligent control module (1), the system function module of single-point acquiring (2) is loaded on general pedestal (3), general pedestal (3) provides bus for I/O intelligent control module (1), the I/O terminal of system power supply and field wiring, described I/O intelligent control module (1) is realized the data acquisition to the system function module (2) of single-point acquiring through bus, output, signal condition and and the external unit swap data,
The system function module of described single-point acquiring (2) comprises single-point AI functional module (2-1), single-point AO functional module (2-2), single-point DI/DO functional module (2-3), single-point PI module (2-4), two-way SOE sequence of events recording module (2-5);
Described single-point AI functional module (2-1) comprises module microcontroller (5), DC/DC change-over circuit (6), system bus interface circuit (4), signal terminal (7), wave filter (8), type selecting circuit (9), correcting circuit (10), programmable amplifier (11), analog to digital converter (12) and the data storage EEPROM(13 be connected with the module microcontroller), WDT circuit (14), the external unit input signal is through signal terminal (7), wave filter (8), type selecting circuit (9), correcting circuit (10), programmable amplifier (11), analog to digital converter (12) is to module microcontroller (5), carry out the signal processing by module microcontroller (5),
Described single-point AO functional module (2-2) comprises module microcontroller (5), DC/DC change-over circuit (6), system bus interface circuit (4), analog to digital converter (12), converter (15), break detection circuit (16), communication driving circuit (17), signal terminal (7) and the data storage EEPROM(13 be connected with the module microcontroller), WDT circuit (14), described module microcontroller (5) is by analog to digital converter (12), converter (15), break detection circuit (16), communication driving circuit (17) by signal to signal terminal (7),
Described single-point DI/DO functional module (2-3) comprises module microcontroller (5), DC/DC change-over circuit (6), system bus interface circuit (4), signal terminal (7), holding circuit (18), driving circuit (19), photoelectric isolating circuit (20) and the data storage EEPROM(13 be connected with the module microcontroller), WDT circuit (14), the external unit input signal is through signal terminal (7), holding circuit (18), driving circuit (19), photoelectric isolating circuit (20) is to module microcontroller (5), carry out the signal processing by module microcontroller (5), module microcontroller (5) is exported the signal of handling well through photoisolator (20), driving circuit (19), holding circuit (18) to signal terminal (7),
Described single-point PI module (2-4) comprises module microcontroller (5), DC/DC change-over circuit (6), system bus interface circuit (4), signal terminal (7), holding circuit (18), circuit (21) is selected in impedance, photoelectric isolating circuit (20), signal transformation circuit (22) and the data storage EEPROM(13 be connected with the module microcontroller), WDT circuit (14), the external unit input signal is through signal terminal (7), holding circuit (18), circuit (21) is selected in impedance, photoelectric isolating circuit (20), signal transformation circuit (22) is to module microcontroller (5), carry out the signal processing by module microcontroller (5),
Described two-way SOE sequence of events recording module (2-5) comprises high speed microprocessor (25), the communicating circuit (28) be connected with high speed microprocessor (25) respectively, data-carrier store (27), WDT circuit (14), condition indication circuit (23) and the sampling channel (32) that passes through high speed data bus (24) and high speed microprocessor (25) communication, and described sampling channel (32) is provided with holding circuit (18), photoelectric isolating circuit (20), signal transformation circuit (22).
2. the I/O intelligent cell that is applied to the DCS system according to claim 1, is characterized in that described DC/DC change-over circuit (6) is provided with power isolation circuit (33).
3. the I/O intelligent cell that is applied to the DCS system according to claim 1, the system function module (2) that it is characterized in that described single-point acquiring also is provided with a modular cartridge (29) that is mated setting, described modular cartridge (29) both sides are provided with erection column (30), and the system function module of single-point acquiring (2) is connected and fixed by erection column (30) and general pedestal (3).
4. the I/O intelligent cell that is applied to the DCS system according to claim 3, is characterized in that described modular cartridge (29) both sides are provided with louvre (31).
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| CN103234617A (en) * | 2013-04-17 | 2013-08-07 | 唐令弟 | Remote-control digital weighing machine with temperature compensation function and temperature compensation method for remote-control digital weighing machine |
| CN105313122A (en) * | 2015-11-19 | 2016-02-10 | 上海交通大学 | Robot grinding device |
| CN106200749B (en) * | 2016-09-26 | 2017-11-10 | 浙江中控技术股份有限公司 | A kind of IO control systems |
| CN106774026B (en) * | 2017-03-02 | 2023-08-22 | 易程创新科技有限公司 | Intelligent line controller |
| JP6773732B2 (en) * | 2018-08-03 | 2020-10-21 | ファナック株式会社 | Trace device |
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