CN201191370Y - Event sequence recording SOE system based on PLC - Google Patents
Event sequence recording SOE system based on PLC Download PDFInfo
- Publication number
- CN201191370Y CN201191370Y CNU2007201828429U CN200720182842U CN201191370Y CN 201191370 Y CN201191370 Y CN 201191370Y CN U2007201828429 U CNU2007201828429 U CN U2007201828429U CN 200720182842 U CN200720182842 U CN 200720182842U CN 201191370 Y CN201191370 Y CN 201191370Y
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- plc
- soe
- record
- interlocking
- counter
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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 utility model belongs to on-off status fast-response recorder of an interlocking system in automatic control fields. In sequence of event SOE recording, because a PLC can execute one order in nanoseconds, the resolution ratio can be lower than 0.25ms/256 dots after using the PLC in SOE. The specific implement method includes using one scanning cycle of the PLC as a basic unit of time to count one time by a second counter, after the second counter is automatically reset at the moment of one second ending and if status of interlocking I/O point changes in one scanning cycle, storing the values of month, date, hours, minutes and seconds of a system clock and a present value of the second counter into each corresponding D data register of the PLC, and then completing the record of SOE. Considering that the PLC can not restart right away after disorderly closedown, each interlocking I/O point has only two time records designed, namely, a record is opened when another record is closed, which is different from the conventional stacked type record of SOE, further, adapting communication of a host computer and the PLC aims to realize sequencing function while completing storage and printing.
Description
One. technical field:
The utility model belongs to automation field interlocking system on off state record.
Two. background technology:
Power station and Production in Chemical Plant process automatic control system all are provided with the safety interlocking shutdown system, and DCS, PLC, ESD and present still in the relay interlocking system of using are arranged, and mostly do not design sequence of events recording (1 millisecond of SOE) system.The present 1 second alarm recording system that uses, this can not differentiate first failure logging for the shutdown system of fast and safely interlocking such as unit, pump.Each contact state of relay interlocking system record change differ have less than 1 millisecond, therefore require sequence of events recording SOE systemic resolution less than 1 millisecond.There is the SOE instrument in sequence of events recording (1 millisecond of the SOE) system that existing market is used, 1 millisecond of resolution, shortcoming be to use the life-span short, resolution is low and do not have printing function.Also have a kind of DCS of being exactly can carry the SOE card, 1 millisecond of resolution realizes by operator station the record printing function can being arranged to the monitoring record of input DCS switching value.Shortcoming is that resolution is low and cost an arm and a leg.
Three. summary of the invention:
The utility model purpose provides a kind of sequence of events recording SOE system based on PLC.We know that the PLC antijamming capability is strong, and carry out an instruction and reached now nanosecond more than 50 years serviceable life, is SOE with it can reach＜the 0.25ms/256 point, satisfies the needs of all kinds of high speed SOE fully.Connect host computer and can realize and the communication of PLC, conveniently realize the recording storage printing function.The base unit (resolution) that to adopt PLC scan period be the time, and a scan period is to one second counter (D227) counting once, and second counter (D227) last zero clearing in a second is once.When interlocking point I/O state changes, with the system clock moon, day, the time, minute, second and second counter (D227) currency count the plc data register.Interlock each point behind scram according to electric power and Chemical Manufacture, not to recover, but in the characteristics of confirming to reset or recover the back of driving, so each I/O interlocking of design PLC has only two time keepings at once, promptly disconnecting one of a closure, is fixing register recording mode.Certainly must print this scram sequence of events recording before or after driving once more, otherwise after stopping once more, last time, the scram sequence of events recording will be washed out.In order to improve system's antijamming capability, PLC I/O each point all adds 20 milliseconds of soft time-delays.PLC has used Mitsubishi Q02H PLC, and the PLC communication module has adopted QJ71C24 RS485 serial communication module and upper machine communication, and PLC CPU and communication module swap data adopt parallel mode.
The beneficial effects of the utility model are: 1. it is strong to do SOE system antijamming capability with PLC, does not have misoperation to take place.2. serviceable life, general instrument can't be compared more than 50 years.3.＜and 0.25ms/256 point high speed acquisition, adapt to the more speed system.4. fixedly recording mode is different with traditional SOE stack formula recording mode, and garbage can be not full with the log buffer top.5. be to connect host computer can conveniently realize the recording storage printing function.6.PLC communication module adopts QJ71C24 RS485 serial communication module, do not account for the PLC CPU time during with upper machine communication, and PLC CPU and QJ71C24 swap data adopt parallel mode, speed is exceedingly fast, do not influence the PLC CPU scan period, thereby PLC can realize that resolution is less than 1 millisecond of high speed acquisition record.7. many PLC can be by RS485 and host computer networking.
Four. description of drawings:
Fig. 1 PLC connects figure with upper machine communication.Wherein (1) is host computer, and (2) are the RS232/485 converter, and (3) are the PLC power module, and (4) are PLC CPU module, and (5) are that PLC switching value I/O module (6) is the PLC communication module.Fig. 2 host computer VB program flow diagram.Fig. 3 PLC program flow diagram.
Five. embodiment:
1. hardware: with Mitsubishi Q02H PLC, carry out an instruction and reach nanosecond among Fig. 1.The monitoring point of each switching value of PLC switching value I/O module (5) input termination.We know that the PLC course of work is: read to import each dotted state of I/O to the input block--〉resolve logical program--〉and refresh output buffer--handle the upper machine communication request, so move in circles.No-output module and nothing refresh the output buffer function in this example.The PLC communication module adopts QJ71C24 RS485 serial communication module, do not account for the PLC CPU time during with upper machine communication, CPU only is sent to the QJ71C24 data buffer and gets final product the value of each the D register that needs the communication transmission is parallel, time-consuming in a large number (2-3 second once) then independently finished by the QJ71C24 communication module with the host computer serial communication, and therefore doing high speed SOE system with PLC becomes possibility.Host computer (1) is an industrial computer, uses the RS232 mouth by RS232/485 converter (2) and QJ71C24 RS485 serial communication module (6) communication.
2.PLC software design: see process flow diagram 3, the base unit (resolution) that to adopt PLC scan period be the time, and a scan period is to one second rolling counters forward once, and second counter last zero clearing in a second is once.Characteristics according to electric power and Chemical Manufacture interlocking system, promptly interlock each point behind scram, not to recover at once, but after resetting or drive, affirmation recovers, have only two time keepings so design each (I/O) interlocking point, promptly closed one disconnects one, for example an interlocking point closure time count D20 (moon), D21 (day), D22 (time), D23 (minute), D24 (second), D25 (counter D227 value second), count trip time D30 (moon), D31 (day), D32 (time), D33 (branch), D34 (second), D35 (counter D227 value second).Different with traditional SOE stack formula recording mode, be fixing recording mode.
3. upper computer software design: see process flow diagram 2, adopt the VB programming, read the value of each D register of PLC and deposit a two-dimensional array in by the QJ71C24 communication module with the actQJ71C24 control.Adopt the bubble sort method that two arrays are sorted in chronological order, the VB Automatic Program adds that master system clock (year) can obtain the SOE tabulation and show printing.
Claims (4)
1. sequence of events recording SOE system based on PLC, form by PLC CPU module, PLC switching value I/O module, PLC communication module, RS232/485 converter and host computer, it is characterized in that: in the variation moment that PLC high-speed record I/O is ordered, host computer is realized and the communication of PLC communication module by the RS232/485 converter.
2. by [claim 1] described a kind of sequence of events recording SOE system based on PLC, it is characterized in that: each I/O interlocking point of PLC has only two time keepings, promptly disconnects one of a closure.
3. by [claim 1] described a kind of sequence of events recording SOE system based on PLC, it is characterized in that: the communication module of PLC adopts serial communication module and upper machine communication, and PLC CPU and communication module swap data adopt parallel mode.
4. by [claim 1] described a kind of sequence of events recording SOE system based on PLC, it is characterized in that: SOE resolution can reach＜the 0.25ms/256 point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201828429U CN201191370Y (en) | 2007-10-26 | 2007-10-26 | Event sequence recording SOE system based on PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201828429U CN201191370Y (en) | 2007-10-26 | 2007-10-26 | Event sequence recording SOE system based on PLC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201191370Y true CN201191370Y (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201828429U Expired - Fee Related CN201191370Y (en) | 2007-10-26 | 2007-10-26 | Event sequence recording SOE system based on PLC |
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| CN (1) | CN201191370Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608923A (en) * | 2011-01-19 | 2012-07-25 | 株式会社日立制作所 | Control system and SOE device |
| CN102768511A (en) * | 2011-05-05 | 2012-11-07 | 北京三博中自科技有限公司 | Searching methd and system for reasons of fault event in process industry |
| CN103076755A (en) * | 2012-12-20 | 2013-05-01 | 中国南方电网有限责任公司调峰调频发电公司天生桥水力发电总厂 | Method for realizing large-capacity sequence-of-event (SOE) record based on program logic controller (PLC) device |
| CN103631230A (en) * | 2013-11-29 | 2014-03-12 | 重庆川仪自动化股份有限公司 | Event sequence recording method and system |
-
2007
- 2007-10-26 CN CNU2007201828429U patent/CN201191370Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608923A (en) * | 2011-01-19 | 2012-07-25 | 株式会社日立制作所 | Control system and SOE device |
| CN102608923B (en) * | 2011-01-19 | 2015-04-22 | 株式会社日立制作所 | Control system and SOE device |
| CN102768511A (en) * | 2011-05-05 | 2012-11-07 | 北京三博中自科技有限公司 | Searching methd and system for reasons of fault event in process industry |
| CN102768511B (en) * | 2011-05-05 | 2014-10-29 | 北京三博中自科技有限公司 | Searching method and system for reasons of fault event in process industry |
| CN103076755A (en) * | 2012-12-20 | 2013-05-01 | 中国南方电网有限责任公司调峰调频发电公司天生桥水力发电总厂 | Method for realizing large-capacity sequence-of-event (SOE) record based on program logic controller (PLC) device |
| CN103076755B (en) * | 2012-12-20 | 2014-10-08 | 中国南方电网有限责任公司调峰调频发电公司天生桥水力发电总厂 | Method for realizing large-capacity sequence-of-event (SOE) record based on program logic controller (PLC) device |
| CN103631230A (en) * | 2013-11-29 | 2014-03-12 | 重庆川仪自动化股份有限公司 | Event sequence recording method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA NATIONAL OFFSHORE OIL CORP. Free format text: FORMER OWNER: CNOOC. TIANYE. CHEMICAL. LIMITED Effective date: 20090410 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: CNOOC. TIANYE. CHEMICAL. LIMITED Free format text: FORMER NAME: NEI MENGGU TIANYE CHEMICAL INDUSTRY( GROUP ) CO.,LTD. |
|
| CP03 | Change of name, title or address |
Address after: Jinqiao Economic and Technological Development Zone, Hohhot, the Inner Mongolia Autonomous Region: 010070 Patentee after: CNOOC Tianye Chemical Co.,Ltd. Address before: Inner Mongolia, Hohhot Jinqiao Economic and Technological Development Zone, the Inner Mongolia Autonomous Region Tianye Chemical (Group) Co., Ltd., postcode: 010070 Patentee before: Inner Mongolia Tianye Chemical (Group) Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20090410 Address after: No. 25 North Street, Chaoyangmen, Beijing, Dongcheng District: 100010 Co-patentee after: CHINA BLUECHEMICAL Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee after: CNOOC Tianye Chemical Co.,Ltd. Address before: Jinqiao Economic and Technological Development Zone, Hohhot, the Inner Mongolia Autonomous Region: 010070 Patentee before: CNOOC Tianye Chemical Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 Termination date: 20151026 |
|
| EXPY | Termination of patent right or utility model |