CN101609316B - Emergency stop event sequence recording system and setting method thereof - Google Patents

Emergency stop event sequence recording system and setting method thereof Download PDF

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Publication number
CN101609316B
CN101609316B CN2009100876876A CN200910087687A CN101609316B CN 101609316 B CN101609316 B CN 101609316B CN 2009100876876 A CN2009100876876 A CN 2009100876876A CN 200910087687 A CN200910087687 A CN 200910087687A CN 101609316 B CN101609316 B CN 101609316B
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module
register
input
programmable logic
logic controller
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CN101609316A (en
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王慧
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China National Offshore Oil Corp CNOOC
China BlueChemical Ltd
CNOOC Tianye Chemical Ltd
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China National Offshore Oil Corp CNOOC
China BlueChemical Ltd
CNOOC Tianye Chemical Ltd
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Abstract

The invention relates to an emergency stop event sequence recording system and a setting method thereof. The system comprises three sets of programmable logic controllers and an upper computer. A power supply module, a microprocessor module, more than one switching value input module, an input register, an output register, a switching value output module, a communication module and a jump relay are arranged in each set of programmable logic controller. A main module, a D register and a second counter are arranged in the microprocessor module in each set of programmable logic controller. A service interruption module and a logic operation module are arranged in the main module. The input signal of the switching value input module is stored in the input register for the logic operation module to carry out emergency stop logic operation. The operation result is stored in the output register in the microprocessor module and is sent to the jump relay through the switching value output module to be carried out by the jump relay. Data registered in the input register, output register and the D register in the microprocessor module are respectively transmitted with each communication module in the upper computer by each communication module through network. The emergency stop event sequence recording system and the setting method are widely applied to automatic control systems of various fields.

Description

A kind of emergency stop event sequence recording system and establishing method
Technical field
The present invention relates to a kind of shutdown system, particularly about emergency stop event sequence recording system in a kind of automation field (SOE) and establishing method.
Background technology
At present, power station and Production in Chemical Plant process automatic control system all are provided with safety interlocking emergency shutdown system (ESD).More than safe class SIL2 level, mostly adopt TRICON (it is high to hang down) and unexpected rival's triplex level redundancy fault-tolerant control system promptly three to select two system, this system reliability is high, can be used for nuclear power and spationautics field.But this system price is very expensive; Do not design sequence of events recording (SOE) system yet; Can not realization event journal resolution less than 1 millisecond function; Can not carry out high-speed record to the switching value signal that gets into safety interlocking emergency shutdown system, if realization event journal function, the part journal instrument of also must and taking over a job is accomplished.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of cost is low, system responses comparatively fast also can realize the record printing function emergency stop event sequence recording system and establishing method.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of emergency stop event sequence recording system; It comprises three cover programmable logic controller (PLC) and host computers; Be provided with a power module, a microprocessor module, above switching input module, an input register, an output register, a switching value output module, a communication module and a jumping car relay in the said programmable logic controller (PLC) of every cover; Each overlaps in the said microprocessor module in the said programmable logic controller (PLC) and has a primary module, a D register and one second counter; An one break in service module and a logical operation module are arranged in the said primary module; It is characterized in that: the input signal of said switching input module deposits said input register in; For the logical operation of stopping in emergency of the logical operation module in the said microprocessor module, operation result is saved to the said output register in the said microprocessor module, is transported to said jumping car relay through said switching value output module simultaneously; Carry out by said jumping car relay, be deposited with in said input register, output register and the microprocessor module data in the D register and carry out data transmission respectively through each communication module in network and the said host computer by each said communication module.
Said primary module is in each scan period; At first by said logical operation module to the logical operation of stopping in emergency of the said switching input module data in the said input register; Adopt second pulse generator last zero clearing in a second once to said second counter; In said break in service module, when the state of said switching input module changes, then with the system clock moon, day, the time, branch, second and said second counter currency count in each said D register.
Said three cover programmable logic controller (PLC)s are formed three and are selected two voting systems.
Each input point of said switching input module has 1~70 millisecond identical soft time-delay.
Said communication module in said every cover programmable logic controller (PLC) all adopts Ethernet serial communication module.
A kind of emergency stop event sequence recording system establishing method is characterized in that: each analog quantity of said emergency stopping system is jumped car signal and is adopted head to go out the semaphore lock method, first signal that locking occurs first and fixing recording mode; Eliminate the back by resetting at the driving prior fault; Latch-release when occurring driving to allow signal, recording mode adopt fixedly recording mode and regularly interruption method, realize said emergency stop event sequence recording function; Its step is following: step 1, in primary module; After the intact logical operation of stopping in emergency of system handles, utilize second pulse generator, export the result of the logical operation of stopping in emergency after the zero clearing in each second foot couple Counter Value second zero clearing; And then handle the other system incident, circulation is to system's logical operation of stopping in emergency; Step 2, in step 1, design break period, realization event journal function; Step 3, in the interrupt module of above-mentioned steps two; Whether the input point of judging each said switching input module has saltus step: (1) judges whether each input point has the upper edge saltus step: if the upper edge saltus step arranged, then the D of correspondence register deposit this moment moon, day, the time, branch, second, second counter value; If there is not the upper edge saltus step, judge then whether input point has the lower edge saltus step; (2) judge whether input point has the lower edge saltus step: if the lower edge saltus step arranged, then the D of correspondence register deposit this moment moon, day, the time, branch, second, second counter value, second, a Counter Value added 1 then, interrupted returning; If there is not the lower edge saltus step, then a second Counter Value adds 1, interrupts returning.
The said interrupt timing time is that 0.1ms/128 point and 0.2ms/256 one of are ordered, and when the input of switching input module was counted smaller or equal to 128, the resolution of sequence of events recording was 0.1ms; When the input of switching input module was counted smaller or equal to 256, the resolution of sequence of events recording was 0.2ms.
The said host computer of said host computer through its communication module read each D register of each self-corresponding communication module transmission in the said programmable logic controller (PLC) of three covers moon, day, the time, branch, second, second timer value sequence of events recording; And respectively deposit a two-dimensional array in; Adopt ranking method to sort two arrays in chronological order; Add the above master system clock " year ", respectively overlapped the sequence of events recording tabulation of said programmable logic controller (PLC), its step is following: step 1, initialization communication module; When host computer has when calling the logout list commands of respectively overlapping programmable logic controller (PLC); Then host computer call moon in all inner D registers, day, the time, branch, second, second Counter Value, and deposit in separately in the two-dimensional array, separately two-dimensional array is sorted; When host computer does not have when calling the logout list commands of respectively overlapping programmable logic controller (PLC), then return and wait for call instruction again; Step 2, select net result; And printing, storage, record: in three cover two-dimensional arrays; Select the identical tabulation of two covers as intermediate result; From this two covers sequence of events recording tabulation, select a cover again, show, store, print this net result, return and wait for call instruction again as net result.
The present invention is owing to take above technical scheme; It has the following advantages: 1, the present invention selects two voting systems owing to adopt the programmable logic controller (PLC) of three cover Mitsubishi QnU series to form three; The reliability of this system selects two safety interlocking emergency shutdown systems identical with existing three; But its price is about 1/3 of an existing system, has therefore realized low, the high reliability features of cost.2, the present invention since the programmable logic controller (PLC) that adopts at the total instruction number of computing during less than 60000, therefore the scan period has realized system responses function faster less than 1ms.3, the present invention is owing to adopt programmable logic controller (PLC) and host computer to connect; Therefore realized communication, the system running state of host computer and each programmable logic controller (PLC) demonstration, three cover programmable logic controller (PLC) input states contrast verification and to the repeated authentication of each programmable logic controller (PLC) logical operation, and realized making things convenient for the function of recording storage printing.4, the present invention is owing to adopt QnU series of programmable logic controller; It can realize the soft interruption of 0.1ms the soonest; Simultaneously owing to adopt fixedly register recording mode; Therefore but the resolution of realization event journal reaches 0.1ms the soonest, can realize being used for the system responses occasion of special high speed sequence of events recording faster.5, the present invention adopts head to go out the semaphore lock method because each analog quantity is jumped the car signal; Locking head goes out first signal and fixing recording mode; Therefore it is minimum that recorded content accounts for the internal memory of programmable logic controller (PLC); The program of programmable logic controller (PLC) is short and small, has improved the programmable logic controller (PLC) travelling speed greatly.6, the present invention is owing to adopt QnU series of programmable logic controller, and the three cover programmable logic controller (PLC) operation time differences can be less than 1ms, had further improved the response speed of system.7, the present invention is because the interior communication module of programmable logic controller (PLC) adopts QJ71E71 Ethernet serial communication module; Do not account for the time of microprocessor module in the programmable logic controller (PLC) during with upper machine communication; And microprocessor module and communication module swap data adopt parallel mode; Do not influence the scan period of microprocessor module, therefore realized that further programmable logic controller (PLC) becomes the high-velocity scanning periodic system.The present invention is widely used in the automatic control system in various fields.
Description of drawings
Fig. 1 is three cover programmable logic controller (PLC) and upper machine communication synoptic diagram of the present invention
Fig. 2 is a functional module structure synoptic diagram in the programmable logic controller (PLC) of the present invention
Fig. 3 is a primary module process flow diagram of the present invention
Fig. 4 is the interrupt module process flow diagram of Fig. 3
Fig. 5 is a host computer process flow diagram of the present invention
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
Like Fig. 1, shown in 2, the present invention includes three cover programmable logic controller (PLC)s (PLC) 10 and a host computer 30, three and overlap programmable logic controller (PLC)s 10 and formed three and select two voting systems.Be provided with a power module 11, a microprocessor (CPU) module 12, a plurality of switching value input (DI) module 13, an input X register 14, an output y register 15, switching value output (DO) module 16, a communication module 17 and an output in every cover programmable logic controller (PLC) 10 and jump car relay 18.Wherein, in microprocessor module 12, have a primary module 121, a D register 122 and one second counter 123, also have a break in service module 124 and logical operation module 125 in the primary module 121.
The input end of each switching input module 13 selects two switches 20 through three or singly selects switch 21 to be connected with power supply (not marking among the figure).The input signal of switching input module 13 deposits the input X register 14 in the programmable logic controller (PLC) 10 in; For the logical operation of stopping in emergency of the logical operation module 125 in the microprocessor module 12; Operation result is saved to the output y register 15 in the microprocessor module 12; Operation result is transported to the input end of jumping car relay 18 through switching value output module 16 simultaneously, carries out by jumping car relay 18.Be deposited with data in the D register 122 in input X register 14, output y register 15 and the microprocessor module 12 and carry out data transmission respectively through network and each communication module 31 in the host computer 30, by the realization alarm of 30 pairs of systems of host computer, monitoring, ordering and printing by each communication module 17.In the present embodiment, programmable logic controller (PLC) 10 adopts the QnU series of programmable logic controller of Mitsubishi, and its average calculating operation instruction is 60 instruction/us, and P/C is than higher, and antijamming capability is strong, has higher reliability, stability.
In the microprocessor module 12 that respectively overlaps programmable logic controller (PLC) 10 of the present invention; Primary module 121 is in each scan period; At first by the logical operation of stopping in emergency of switching input module 13 data in 125 pairs of the logical operation module input X register 14; Operation result is transported to break in service module 124 and output y register 15 respectively; Break in service module 124 can be set 0.1ms operation 1 time, and by second pulse generator (not marking among the figure) in the microprocessor module 12 to second counter 123 carry out a zero clearing at one second end.Here 0.1ms also is the resolution of sequence of events recording; When the state of switching input module 13 changes; Then with the system clock moon, day, the time, branch, second and second counter 123 currency count in each programmable logic controller (PLC) 10 in corresponding D registers 122; Accomplish sequence of events recording, the currency of last second counter 123 adds 1.Characteristics according to electric power and Chemical Manufacture interlocking system; The interlocking point is not to resume work behind scram at once; But the characteristics of after affirmation resets or drives, recovering; According to the switching value stop sign of electromechanical equipment, designing each interlocking point has two time keepings, i.e. one of closure, one of disconnection.For example; One interlocking point closure time count D130 (moon), D131 (day), D132 (time), D133 (minute), D134 (second), the D135 value of counter (current second), count trip time D140 (moon), D141 (day), D142 (time), D143 (branch), D144 (second), the D145 value of counter (current second).All the other I/O each points by that analogy.
In the foregoing description, three select two switches 20 or singly select an end of switch 21 to be connected with power supply, and the other end is connected with the input end of each switching input module 13.When the input end and three of each switching input module 13 selects two switches 20 to be connected, then three select three switching value signals of two switches 20 to be connected with three cover programmable logic controller (PLC)s, 10 interior switching input modules 13 respectively; When the input end of each switching input module 13 when singly selecting switch 21 to be connected, then singly select a switching value signal of switch 21 be divided into three road signals respectively with three cover programmable logic controller (PLC)s 10 in switching input modules 13 be connected.
In the foregoing description, when the operation result of programmable logic controller (PLC) 10 was normal condition, jumping car relay 18 got electric, and jumping car relay 18 is normal operating condition; When the operation result of programmable logic controller (PLC) 10 is jumping car state, jump 18 outages of car relay, then jump car relay 18 and be jumping car state.Each overlaps the operation result of programmable logic controller (PLC) 10 and carries out action through three jumping car relays 18, and when any two jumping car relays 18 were in normal operating conditions, then system normally moved; When any two jumping car relays 18 are made the action of jumping car, then stop in emergency, realized that so three select two votings.
In the foregoing description; In order further to improve the antijamming capability of system of the present invention; Can all add 1~70 millisecond identical soft time-delay in each input point of the switching input module 13 in each overlaps programmable logic controller (PLC) 10, this can decide according to the parking response time requirement of technological process.
The present invention is in assignment procedure; For the high high or low low jumping car signal of each analog quantity, adopt to occur the semaphore lock method first first signal that locking occurs first and fixing recording mode; Eliminate the back by resetting latch-release when occurring driving to allow signal at the driving prior fault.Owing to adopt fixedly recording mode, it is minimum that record accounts for the internal memory of programmable logic controller (PLC) 10, omitted the memory address distributive operation, and the program of programmable logic controller (PLC) 10 is short and small, so improved programmable logic controller (PLC) 10 travelling speed greatly.Therefore, recording mode of the present invention adopts fixedly recording mode and regularly interruption method, realizes the emergency stop event sequence recording function, and its concrete steps are (like Fig. 3, shown in Figure 4) as follows:
Step 1, in primary module 121, after logical operation module 125 is handled the logical operation of stopping in emergency, utilize second pulse generator, then the output result of logical operation of stopping in emergency in each second foot couple counter second value zero clearing of 123.When host computer 30 calls logout as a result the time, then the data with logout result in the D register 122 are uploaded to host computer 30 through communication module 17.And then handle the other system incident, recycle is to system stop in emergency logical operation, so circulation.
Step 2, in step 1, adopt break in service module 124, with realization event journal function: can set the interrupt timing time is 0.1ms/128 point or 0.2ms/256 point.If the input of switching input module 13 is counted smaller or equal to 128 points, resolution that then can the realization event journal is 0.1ms; If the input of switching input module 13 is counted smaller or equal to 256 points, resolution that then can the realization event journal is 0.2ms.
Step 3, in the break in service module 124 of step 2, judge whether the input point of each switching input module 13 has saltus step:
(1) judges whether each input point has the upper edge saltus step; Judge promptly whether switching input module 13 is closed: if the upper edge saltus step is arranged; Then the D of correspondence register 122 deposit this moment moon, day, the time, branch, second, second counter value so that host computer 30 calls at any time, go to next step.
(2) judge whether input point has the lower edge saltus step; Judge promptly whether switching input module 13 breaks off: if the lower edge saltus step is arranged; Then the D of correspondence register 122 deposit this moment moon, day, the time, branch, second, second counter value so that host computer 30 calls at any time, go to next step.
(3) value of second counter 123 adds 1, and break in service finishes to return.
As shown in Figure 5; Adopt the VB programming in the host computer 30 of the present invention; Host computer 30 read through communication module 31 moon in the D register 122 of each self-corresponding communication modules 17 transmission in the three cover programmable logic controller (PLC)s 10, day, the time, branch, second, second counter 123 the status data of value, and deposit a two-dimensional array in.And adopt ranking method to sort two arrays in chronological order, add that host computer 30 system clocks (year) can respectively be overlapped the sequence of events recording tabulation of programmable logic controller (PLC) 10.Its concrete steps are following:
Step 1, initialization communication module; When host computer has when calling the logout list commands of respectively overlapping programmable logic controller (PLC) 10; Judge whether sequence of events recording tabulation: when all sequence of events recording being arranged in the D register 122 of each cover programmable logic controller (PLC) 10, then host computer 30 call moon in all D registers 122, day, the time, branch, second, second Counter Value, and deposit in separately in the two-dimensional array; Two-dimensional array ordering with separately goes to step 2; When host computer does not call the logout list commands of respectively overlapping programmable logic controller (PLC) 10, then return and wait for call instruction again.
Step 2, select net result; And printing, storage, record: in three cover two-dimensional arrays; Select the identical tabulation of two covers as intermediate result; From this two covers sequence of events recording tabulation, select a cover again, show, store, print this net result, return and wait for call instruction again as net result.
The present invention in use, the three 10 operation time differences of cover QnU series of programmable logic controllers can be less than 1ms, can satisfy the requirement of ultrahigh-speed system.Communication module 17 in every cover programmable logic controller (PLC) 10 all adopts QJ71E71 Ethernet serial communication module, does not take the time of microprocessor module 12 when carrying out data transmission with three Upper machine communication module 31 in the host computer 30.
In sum; Because adopting, the present invention connects host computer 30; When therefore position machine 30 is with each programmable logic controller (PLC) 10 communication in realization; Can also realize system running state demonstration, three cover programmable logic controller (PLC)s 10 input states contrast verification and to the repeated authentication of each programmable logic controller (PLC) 10 logical operation, and realize the function that makes things convenient for recording storage to print.After logical operation is stopped in emergency in completion, detect the state of switching input module 13 each input points in each programmable logic controller (PLC) 10, when changing, input point then system time is charged to corresponding D register 122, promptly accomplish sequence of events recording (SOE).Because QnU series of programmable logic controller antijamming capability is stronger; Serviceable life is more than 40 years; Carrying out an instruction only needs several nanoseconds, therefore carry out logical operation, the total instruction number of computing when detecting each input point state can be less than 60000/time.The scan period of each programmable logic controller (PLC) 10 is less than 1ms, and sequence of events recording can be less than the resolution of 0.1ms.Therefore, the present invention can satisfy the needs of all kinds of high speed sequence of events recording.

Claims (8)

1. emergency stop event sequence recording system; It comprises three cover programmable logic controller (PLC) and host computers; Be provided with a power module, a microprocessor module, above switching input module, an input register, an output register, a switching value output module, a communication module and a jumping car relay in the said programmable logic controller (PLC) of every cover; Each overlaps in the said microprocessor module in the said programmable logic controller (PLC) and has a primary module, a D register and one second counter; An one break in service module and a logical operation module are arranged in the said primary module; It is characterized in that: said three cover programmable logic controller (PLC)s are formed three and are selected two voting systems, when any two jumping car relays are made the action of jumping car, then stop in emergency; The input signal of said switching input module deposits said input register in; For the logical operation of stopping in emergency of the logical operation module in the said microprocessor module; Operation result is saved to the said output register in the said microprocessor module; Be transported to said jumping car relay through said switching value output module simultaneously; Carry out by said jumping car relay, be deposited with in said input register, output register and the microprocessor module data in the D register and carry out data transmission respectively through each communication module in network and the said host computer by each said communication module.
2. a kind of emergency stop event sequence recording system as claimed in claim 1; It is characterized in that: said primary module is in each scan period; At first by said logical operation module to the logical operation of stopping in emergency of the said switching input module data in the said input register; Adopt second pulse generator last zero clearing in a second once to said second counter; In said break in service module, when the state of said switching input module changes, then with the system clock moon, day, the time, branch, second and said second counter currency count in each said D register.
3. a kind of emergency stop event sequence recording system as claimed in claim 1 is characterized in that: each input point of said switching input module has 1~70 millisecond identical soft time-delay.
4. a kind of emergency stop event sequence recording system as claimed in claim 2 is characterized in that: each input point of said switching input module has 1~70 millisecond identical soft time-delay.
5. like claim 1 or 2 or 3 or 4 described a kind of emergency stop event sequence recording systems, it is characterized in that: the said communication module in said every cover programmable logic controller (PLC) all adopts Ethernet serial communication module.
6. establishing method like claim 1 or 2 or 3 or 4 or 5 said emergency stop event sequence recording systems; It is characterized in that: each analog quantity of said emergency stop event sequence recording system is jumped the car signal and is adopted head to go out the semaphore lock method; First signal that locking occurs first and fixing recording mode; Eliminate the back by resetting at the driving prior fault, latch-release when the permission signal occurring driving, recording mode adopts fixedly recording mode and regularly interruption method; Realize said emergency stop event sequence recording function, its step is following:
Step 1, in primary module; After the intact logical operation of stopping in emergency of system handles, utilize second pulse generator, export the result of the logical operation of stopping in emergency after the zero clearing in each second foot couple Counter Value second zero clearing; And then handle the other system incident, circulation is to system's logical operation of stopping in emergency;
Step 2, in step 1, design break period, realization event journal function;
Step 3, in the interrupt module of above-mentioned steps two, judge whether the input point of each said switching input module has saltus step:
(1) judge whether each input point has the upper edge saltus step: if the upper edge saltus step arranged, then the D of correspondence register deposit this moment moon, day, the time, branch, second, second counter value; If there is not the upper edge saltus step, judge then whether input point has the lower edge saltus step;
(2) judge whether input point has the lower edge saltus step: if the lower edge saltus step arranged, then the D of correspondence register deposit this moment moon, day, the time, branch, second, second counter value, second, a Counter Value added 1 then, interrupted returning; If there is not the lower edge saltus step, then a second Counter Value adds 1, interrupts returning.
7. the establishing method of a kind of emergency stop event sequence recording system as claimed in claim 6; It is characterized in that: the interrupt timing time is that 0.1ms/128 point and 0.2ms/256 one of are ordered; When the input of switching input module was counted smaller or equal to 128, the resolution of sequence of events recording was 0.1ms; Count greater than 128 and during smaller or equal to 256 when the input of switching input module, the resolution of sequence of events recording is 0.2ms.
8. like the establishing method of claim 6 or 7 described a kind of emergency stop event sequence recording systems; It is characterized in that: said host computer through its communication module read each D register of each self-corresponding communication module transmission in the said programmable logic controller (PLC) of three covers moon, day, the time, branch, second, second timer value sequence of events recording; And respectively deposit a two-dimensional array in; Adopt ranking method to sort two arrays in chronological order; Add the above master system clock " year ", respectively overlapped the sequence of events recording tabulation of said programmable logic controller (PLC), its step is following:
The communication module of step 1, the said host computer of initialization; When host computer has when calling the logout list commands of respectively overlapping programmable logic controller (PLC); Then host computer call moon in all inner D registers, day, the time, branch, second, second Counter Value; And deposit in separately in the two-dimensional array, with two-dimensional array ordering separately; When host computer does not have when calling the logout list commands of respectively overlapping programmable logic controller (PLC), then return and wait for call instruction again;
Step 2, select net result; And printing, storage, record: in three cover two-dimensional arrays; Select the identical tabulation of two covers as intermediate result; From this two covers sequence of events recording tabulation, select a cover again, show, store, print this net result, return and wait for call instruction again as net result.
CN2009100876876A 2009-07-02 2009-07-02 Emergency stop event sequence recording system and setting method thereof Expired - Fee Related CN101609316B (en)

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