CN102591263A - 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 the I/O unit of a kind of DCS of being applied to system.
Background technology
The DCS system is the complicated day by day complex control system of arising at the historic moment that requires along with the continuous rise of the modern large scale industry production automation and process control; It is the product that computer technology, system's control technology, network communications technology and multimedia technology combine, and has advanced control control strategy, pattern manipulation interface and online in real time configuration instrument; Friendly man-machine interface of window and powerful communication function can be provided, and are the state-of-the-art facilitys of complete process control, process management.
The DCS system mainly contains field control station (I/O station), data communication unit, man-machine interface unit compositions such as (OPS of operator station, engineer station ENS).Wherein, field control station is the core of control system, generally comprises redundant power supply module, CPU control module, bus mother board or machine cage, communication unit and I/O unit and forms.Show that according to statistics the problem 90% that the control system of traditional structure occurs occurs in the I/O unit.And general integrated 8 road or 16 tunnel even 32 tunnel the functional module in a block I/O unit in case a certain road functional module breaks down, maintain and replace will have influence on entire I/O unit, brings influence in a big way to The 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 be brought the maintenance and the replacing of I/O whole unit, and then influences the normal operation of systemic-function.
Summary of the invention
The technical matters that the present invention will solve provides a kind of I/O intelligent cell that is applied to the DCS system easily of safeguarding and change.
For addressing the above problem; The technical scheme that the present invention adopts mainly is made up of the system function module of I/O intelligent control module, single-point acquiring, general pedestal; The system function module of said I/O intelligent control module, single-point acquiring is loaded on the 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 said I/O intelligent control module is realized data acquisition, output, signal condition and and 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 said 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.
Said 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 the data storage EEPROM that is connected with the module microcontroller, WDT circuit; The external unit input signal carries out signal Processing through signal terminal, wave filter, type selecting circuit, correcting circuit, programmable amplifier, analog to digital converter to module microcontroller by the module microcontroller.
Said 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 storage EEPROM that is connected with the module microcontroller, WDT circuit, said module microcontroller through analog to digital converter, converter, break detection circuit, communication driving circuit with signal to signal terminal.
Said 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 the data storage EEPROM that is connected with the module microcontroller, WDT circuit; The external unit input signal carries out signal Processing through signal terminal, holding circuit, driving circuit, photoelectric isolating circuit to module microcontroller by the module microcontroller; The module microcontroller is exported the signal of handling well through photoisolator, driving circuit, holding circuit to signal terminal.
Said single-point PI module comprises module microcontroller, DC/DC change-over circuit, system bus interface circuit, signal terminal, holding circuit, impedance selection circuit, photoelectric isolating circuit, signal transformation circuit and the data storage EEPROM that is connected with the module microcontroller, WDT circuit; The external unit input signal is selected circuit, photoelectric isolating circuit, signal transformation circuit to module microcontroller through signal terminal, holding circuit, impedance, carries out signal Processing by the module microcontroller.
Said two-way SOE sequence of events recording module comprises high speed microprocessor, the communicating circuit that is connected with high speed microprocessor respectively, data-carrier store, WDT circuit, condition indication circuit and the sampling channel that passes through high speed data bus and high speed microprocessor communication, and said 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 said 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 said single-point acquiring also is provided with a modular cartridge that is mated installation; Said modular cartridge both sides are provided with erection column, and the system function module of single-point acquiring is connected fixing with general pedestal through erection column.
The described I/O intelligent cell that is applied to the DCS system is characterized in that said modular cartridge both sides are provided with louvre.
The present invention has following beneficial effect:
1, evades the related influence that the Breakdown Maintenance because of a certain road functional module causes, and supported hot plug, made things convenient for installation and maintenance.
2, the module of the present invention's exploitation is a kind of system function module to single-point acquiring, has improved the dirigibility and the stability of system.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 and Fig. 9 are the composition structural drawing of I/O intelligent cell of the present invention.
Fig. 2 is the composition structural drawing of 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.
Fig. 7 is the structural drawing of modular cartridge of the present invention.
Fig. 8 is the scheme of installation of the system function module of modular cartridge of the present invention and single-point acquiring.
Figure 10 is a power isolation circuit circuit diagram of the present invention.
Embodiment
The DCS system architecture is the basis with the network, is equipped with various functional unit, module and the assemblies that are articulated on the network, realizes each several part co-ordination and data sharing, accomplishes various automatic controls and information management function jointly.DCS system architecture master is made up 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 computing and the control output that realize industry spot, its main control unit is a core, uses the control net that various I/O unit is coupled together.
Like Fig. 1 and shown in Figure 9; I/O of the present invention unit mainly is made up of system function module 2, the general pedestal 3 of I/O intelligent control module 1, single-point acquiring; The system function module 2 of I/O intelligent control module 1 and single-point acquiring is loaded on the general pedestal 3; General pedestal also provides bus and system power supply through bottom connector (not drawing among the figure) for the I/O intelligent control module; The I/O terminal of field wiring is provided simultaneously, and the I/O intelligent control module is realized data acquisition and output, signal condition and and the main control unit swap data to the system function module 2 of single-point acquiring.
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 cost.Like Fig. 7 and shown in Figure 8; For the protection system functional module with make things convenient for system function module to install; The present invention also provides a modular cartridge 29 that is equipped with system function module, and the modular cartridge both sides are provided with erection column 30, and it is fixing that system function module utilizes the modular cartridge erection column to be connected with general pedestal 3.The modular cartridge both sides are provided with louvre 31, can prevent that temperature is too high in the modular cartridge, influence system function module work, are that in addition the modular cartridge front end is provided with pilot lamp, are used for the state of Display System Function module operation, make things convenient for 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 that is connected with the module microcontroller, WDT circuit 14; On-site signal gets into through signal terminal 7; At first through wave filter 8 hardware filterings, the signal type type selecting circuit 9 according to configuration switches selection subsequently, again through programmable amplifier 11; Convert digital quantity signal into to analog to digital converter 12; Last module microcontroller 5 carries out relevant signal Processing, and correcting circuit 10 capable of using carries out temperature compensation and zero point and span calibration in real time simultaneously, guarantees the accuracy of sampled data.DC/DC change-over circuit 6 is set in addition can receives dissimilar stream voltage, system bus interface circuit 4 is set is connected with dexterous bus SmartBus.For guaranteeing between module and the system, isolating fully between module and the module, external disturbance is kept outside of the door, on DC/DC change-over circuit 6, also be provided with power isolation circuit 33.
Module characteristic: 1, software setting input signal types, range ability, warning message etc., and can online modification; 2, online self diagnosis is supported burn out detection, and the indication of module running status helps the user to differentiate the source of trouble; 3, online self-correcting can be carried out zero point, gain compensation automatically according to the variation of module working environment, need not the potentiometer manual synchronizing; 4, between module and the system, isolate fully between module and the module, external disturbance is kept outside of the door; Automatically carry out cold junction compensation when 5, thermocouple signal is imported, 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 that is 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 carries out treatment conversion according to configuration parameter to output data; And output to digital to analog converter 12 and carry out digital-to-analog conversion; Analog voltage signal after the conversion is through converter 15; And the break detection circuit 16 that whether breaks off unusually through the line that is used to judge on-site signal, and carry out the communication driving circuit 17 that communication drives, at last through the stable current signal of signal terminal 7 outputs.
Module characteristic: 1, the online configuration of output type, online modification; 2, online self diagnosis is supported burn out detection, and the indication of module running status helps the user to differentiate the source of trouble; 3, isolate fully between module and system, module and the module, external disturbance is kept outside of the door; 4, when communication occur to be interrupted, can keep operate as normal and require to keep state or the preassigned result of user before the fault according to configuration; 5, WDT circuit design, the assurance module is normally moved.
As shown in Figure 4; 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 the data storage EEPROM13 that is connected with the module microcontroller, WDT circuit 14; Module is a core with module microcontroller 5, moves the required related parameter that has and when software arrangements, sets.The digital quantity input signal through signal terminal 7, rise overcurrent protection holding circuit 18, play driving circuit 17 that communication drives, carry out sampling behind the photoelectric isolating circuit 20 that photoelectricity isolates.Equally, digital quantity output signal exports field apparatus to through photoelectricity isolation, communication driving, overcurrent protection.WDT circuit 14 is responsible for the operation conditions of monitor module programs, when module is disturbed and the CPU that will in time reset after the program richochet, guarantees that modular program normally moves.
Module characteristic: 1, independent intelligent module microprocessor design; 2, a module provides independent 2 road digital quantity passages simultaneously; 3, online self diagnosis, the indication of module running status helps the user to differentiate the source of trouble; 4, adopt photoelectric isolation technology and digital filtering technique, external disturbance is kept outside of the door; When 5, the communicating interrupt fault occurring, still can keep operate as normal and require keep state or the result of user's appointment before the fault according to configuration; 6, WDT circuit design, the CPU that can in time reset after the richochet of assurance modular program, recovery routine normally moves.
As shown in Figure 5; Said 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, impedance selection circuit 21, photoelectric isolating circuit 20, signal transformation circuit 22 and the data storage EEPROM13 that is connected with the module microcontroller, WDT circuit 14; Module is with module microcontroller 5 cores; System bus interface circuit 4 through standard inserts dexterous bus SmartBus, realizes 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, the pulsed quantity conversion of signals is become 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 among the module data storage EEPROM13, and the configuration information power down is not lost.The operation conditions of WDT circuit 14 real-time monitoring modular control programs will in time reset when module receives interference to cause the program richochet, guarantee the 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 multiple signal, and is applied widely; 3, signal input photoelectricity is isolated, and isolation voltage is not less than 1500V; 4, online self diagnosis in time reflects the module running status; 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 that is 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 said 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 is a core with high speed microprocessor 25; Through the HSDB millisecond regularly; Trigger the sampling of sampling channel 32 states; Through to each channel signal state variation inspection, 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 the event information inquiry and the recording clock synch command of external unit through communicating circuit 28; Carry out self diagnosis simultaneously and send fortune condition indication circuit 23 with testing result, indication is when front module running status and communication condition.Holding circuit 18 on the sampling channel 32, optically coupled isolation circuit 20, signal transformation circuit 22 carry out 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, integrated 2 road DI input channels adopt photoelectric isolation technology, guarantee that isolation voltage reaches 1500V between on-site signal and the system; 5, support redundant CNet communication network, communication speed 1Mbps; 6, the full isolation design of passage and interchannel does not influence the operate as normal of rest channels when making passage or signal fault;
7, module self overcurrent protection function is imported when excessive because of faults itself causes electric current when module, has self-protection function, module recovery operate as normal after fault is got rid of; 8, each control station can carry out the SOE record to 192 switching values, and each control station logout capacity is 10240.
Claims (6)
1. I/O intelligent cell that is applied to the DCS system; It is characterized in that this I/O intelligent cell mainly is made up of the system function module (2) of I/O intelligent control module (1), single-point acquiring, general pedestal (3); The system function module (2) of said I/O intelligent control module (1), single-point acquiring is loaded on the general pedestal (3); General pedestal (3) is the I/O terminal that I/O intelligent control module (1) provides bus, system power supply and field wiring, and said I/O intelligent control module (1) is realized data acquisition, output, signal condition and and external unit swap data to the system function module (2) of single-point acquiring through bus.
2. the I/O intelligent cell that is applied to the DCS system according to claim 1 is characterized in that the system function module (2) of said single-point acquiring 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);
Said 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) that is connected with the module microcontroller, WDT circuit (14); The external unit input signal to module microcontroller (5), carries out signal Processing by module microcontroller (5) through signal terminal (7), wave filter (8), type selecting circuit (9), correcting circuit (10), programmable amplifier (11), analog to digital converter (12).
3. said 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) that is connected with the module microcontroller, WDT circuit (14), said module microcontroller (5) through analog to digital converter (12), converter (15), break detection circuit (16), communication driving circuit (17) with signal to signal terminal (7);
Said 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) that is connected with the module microcontroller, WDT circuit (14); The external unit input signal to module microcontroller (5), carries out signal Processing by module microcontroller (5) through signal terminal (7), holding circuit (18), driving circuit (19), photoelectric isolating circuit (20); Module microcontroller (5) is exported the signal of handling well through photoisolator (20), driving circuit (19), holding circuit (18) to signal terminal (7);
Said 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), impedance selection circuit (21), photoelectric isolating circuit (20), signal transformation circuit (22) and the data storage EEPROM (13) that is connected with the module microcontroller, WDT circuit (14); The external unit input signal selects circuit (21), photoelectric isolating circuit (20), signal transformation circuit (22) to module microcontroller (5) through signal terminal (7), holding circuit (18), impedance, carries out signal Processing by module microcontroller (5);
Said two-way SOE sequence of events recording module (2-5) comprises high speed microprocessor (25), the communicating circuit (28) that is 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 said sampling channel (32) is provided with holding circuit (18), photoelectric isolating circuit (20), signal transformation circuit (22).
4. the I/O intelligent cell that is applied to the DCS system according to claim 2 is characterized in that said DC/DC change-over circuit (6) is provided with power isolation circuit (33).
5. according to each described I/O intelligent cell that is applied to the DCS system of claim 1 to 3; The system function module (2) that it is characterized in that said single-point acquiring also is provided with a modular cartridge (29) that is mated setting; Said modular cartridge (29) both sides are provided with erection column (30), and the system function module of single-point acquiring (2) is connected fixing with general pedestal (3) through erection column (30).
6. the I/O intelligent cell that is applied to the DCS system according to claim 4 is characterized in that said 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 |
| CN106200749A (en) * | 2016-09-26 | 2016-12-07 | 浙江中控技术股份有限公司 | A kind of IO control system |
| CN106774026A (en) * | 2017-03-02 | 2017-05-31 | 易程创新科技有限公司 | A kind of intelligent line controller |
| CN110794758A (en) * | 2018-08-03 | 2020-02-14 | 发那科株式会社 | Tracking device |
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| CN102591263B (en) | 2013-12-04 |
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