CN112099429B - Working state recovery method for short-time power failure of continuous heating control equipment - Google Patents
Working state recovery method for short-time power failure of continuous heating control equipment Download PDFInfo
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- CN112099429B CN112099429B CN202010968500.XA CN202010968500A CN112099429B CN 112099429 B CN112099429 B CN 112099429B CN 202010968500 A CN202010968500 A CN 202010968500A CN 112099429 B CN112099429 B CN 112099429B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention aims to provide a working state recovery method for a short-time power failure of continuous heating control equipment, which is characterized in that the working condition is recovered through a PLC (programmable logic controller) and a newly-added power failure timer which are arranged on the equipment, the labor is replaced, the cost is lower, the conditions needing to be judged in the working condition recovery process are judged and the working condition is recovered through the PLC and the newly-added power failure timer which are arranged on the equipment, the recovery process does not need manual operation, the recovery efficiency is greatly improved, the attendance of personnel is not needed, and the method has the advantage of low cost.
Description
Technical Field
The invention belongs to the technical field of power failure recovery, and particularly relates to a working state recovery method for short-time power failure of continuous heating control equipment.
Background
For superhard materials, in the production process of needing long-time heating, defective products, waste products, equipment damage and other consequences can be caused by accidental power failure; when the electric wire netting resumes the power supply again because some problem outage, need resume equipment, the common condition has the condition such as electric wire netting power failure and thunderbolt, about several tenths to tens seconds are not equal, generally need use the UPS power in order to solve this problem, use the UPS power although can prevent to cut off the power supply but the cost is higher, consider that the time of factory power supply outage is not long, can all resume the power supply under ten seconds normal condition, and resume the processing that can not influence the product to the operating mode after the short time outage, consequently, can carry out artificial manual restoration to the operating mode, but manual restoration needs the technical staff to have higher experience, and when unmanned on duty, can not in time resume and can cause the product to scrap.
Disclosure of Invention
The invention aims to provide a working state recovery method for a continuous heating control device in a short-time power failure mode.
The technical scheme for solving the technical problem of the invention is as follows: a working state recovery method for short-time power failure of continuous heating control equipment comprises the following steps:
s1: when the load equipment is powered off and the PLC is powered off, the power-off timer starts to time; when the load equipment is powered off and the PLC is not powered off, the power-off timer starts to time; when the load equipment is not powered off and the PLC is powered off, the power-off timer starts to time;
s2: after the power supply of the power-off equipment is restored, the PLC judges whether the current working step meets the restoration requirement, if so, S3 is executed, and if not, the power-off equipment is stopped to give an alarm;
s3: the PLC reads the data of the current power-off timer, judges whether the power-off time meets the recovery requirement, if so, executes S4, and if not, stops the machine for alarming;
s4: when the load equipment is powered off and the PLC is powered off in the step S1, and the load equipment is not powered off and the PLC is powered off, reading the working state before the power failure by the PLC; when the load equipment is powered off and the PLC is not powered off, executing step S5;
s5: when the load equipment is not powered off and the PLC is powered off in the step S1, the PLC judges the current state, if the current state meets the working condition, the recovery is completed, and if the current state does not meet the working condition, S7 is executed;
s6: the PLC controls the power to be increased, so that the current power is gradually increased to the standard power;
s7: and (5) the working condition is recovered to be normal, and the recovery is finished.
In order to recover the normal operating condition as soon as possible, in step S6, the PLC controls to increase the power, gradually increase the current power to be greater than the standard power and less than the maximum power within the safety range, and shield the alarm signal generated by the current power being greater than the standard power; in step S7, after the operating condition returns to normal, the current power is reduced to make the current power equal to the standard power, and then the return is completed.
The step S2 of determining whether the working step meets the recovery requirement specifically includes stopping the machine to alarm when the working step is in the step of boosting or stabilizing voltage, and executing step S3 if the working step is not in the step of boosting or stabilizing voltage;
in the step S4, the working state read by the PLC before power failure includes power, current, and working steps.
The invention has the beneficial effects that: the condition that needs to judge among the operating mode recovery process is judged and the operating mode resumes through the PLC of equipment self-carrying and newly-increased outage timer, and the process of resuming also need not artificial operation, has improved recovery efficiency greatly and need not personnel's watch on to have low cost's advantage.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention comprises the steps of:
s1: when the load equipment is powered off and the PLC is powered off, the power-off timer starts to time; when the load equipment is powered off and the PLC is not powered off, the power-off timer starts to time; when the load equipment is not powered off and the PLC is powered off, the power-off timer starts to time;
s2: after the power supply of the power-off equipment is restored, the PLC judges whether the current working step meets the restoration requirement, if so, S3 is executed, and if not, the power-off equipment is stopped to give an alarm;
s3: the PLC reads the data of the current power-off timer, judges whether the power-off time meets the recovery requirement, if so, executes S4, and if not, stops the machine for alarming;
s4: when the load equipment is powered off and the PLC is powered off in the step S1, and the load equipment is not powered off and the PLC is powered off, reading the working state before the power failure by the PLC; when the load equipment is powered off and the PLC is not powered off, executing the step S5;
s5: when the load equipment is not powered off and the PLC is powered off in the step S1, the PLC judges the current state, if the current state meets the working condition, the recovery is completed, and if the current state does not meet the working condition, S7 is executed;
s6: the PLC controls the power to be increased, so that the current power is gradually increased to the standard power;
s7: and (5) the working condition is recovered to be normal, and the recovery is finished.
In order to recover the normal operating condition as soon as possible, in step S6, the PLC controls to increase the power, gradually increase the current power to be greater than the standard power and less than the maximum power within the safety range, and shield the alarm signal generated by the current power being greater than the standard power; in step S7, after the operating condition returns to normal, the current power is reduced to make the current power equal to the standard power, and then the return is completed.
The step S2 of determining whether the working step meets the recovery requirement specifically includes stopping the machine to alarm when the working step is in the step of boosting or stabilizing voltage, and executing step S3 if the working step is not in the step of boosting or stabilizing voltage;
in the step S4, the working state read by the PLC before power failure includes power, current, and working steps.
Under the general condition, the condition of grid power failure has three kinds, load device outage, the PLC outage (the normal outage condition, the reason is the grid power failure, time about 1 second to ten seconds is not equal), load device outage, PLC outage (the reason may be the thunderbolt, the short-term power failure that causes, about a few tenths of a second, because certain electromotive force has on the PLC this moment, probably not real outage, still normal work, load device outage, the PLC outage (the single PLC outage that causes because other unexpected reasons), newly-increased outage timer (extra mains operated) begins work, the timing begins.
The PLC used in the present embodiment is a PLC provided in the load device.
After the power supply of the power-off equipment is recovered, the PLC judges whether the current working condition meets the recovery requirement, the operation is carried out at high temperature and high pressure again because of the superhard material, and if the current working condition is in the states of boosting or stabilizing voltage and the like, the PLC is not suitable for recovery and needs to be shut down for alarming.
If satisfy the requirement of resumeing, PLC reads the timing data of outage timer, judge whether the outage time satisfies the requirement of resumeing, superhard materials itself needs the continuous heating in the course of working, because outer outage time overlength may lead to the product to scrap, this kind of condition is not applicable to the recovery this moment, need change the product, if the outage time satisfies the requirement of resumeing, and satisfy the outage of load equipment, PLC outage or load equipment do not cut off the power supply, the condition of PLC outage, PLC reads the operating condition before the outage this moment, such as the labor rate, the electric current, information such as operating procedure, if PLC does not cut off the power supply, then need not read the operating condition before the outage.
In the process of recovering, current is judged, load equipment is not powered off, under the condition that PLC is powered off, the current is normal, only PLC is powered off, therefore, additional operation is not needed, if two conditions remain, the current does not meet the working condition, PLC carries out a steady promotion to the power at this moment, make the working condition recover to normal, in this process, in order to make the fast recovery of working condition as far as possible, need to make the power increase exceed standard power and be less than the maximum power in the safety range, the purpose of doing so is to make the fast recovery of temperature as far as possible, thereby reduce the influence to the product, because exceed standard power, consequently can send out the warning, need shield the alarm signal that consequently causes, after the working condition recovery is accomplished, reduce power to standard power, accomplish the recovery.
The invention judges the condition to be judged in the working condition recovery process and recovers the working condition through the PLC of the equipment and the newly-added power-off timer, the recovery process does not need manual operation, the recovery efficiency is greatly improved, the personnel watching is not needed, and the invention has the advantage of low cost.
Claims (3)
1. A working state recovery method for short-time power failure of continuous heating control equipment is characterized by comprising the following steps:
s1: when the load equipment is powered off and the PLC is powered off, the power-off timer starts to time; when the load equipment is powered off and the PLC is not powered off, the power-off timer starts to time; when the load equipment is not powered off and the PLC is powered off, the power-off timer starts to time;
s2: after the power supply of the power-off equipment is restored, the PLC judges whether the current working step meets the restoration requirement, if so, S3 is executed, and if not, the power-off equipment is stopped to give an alarm;
s3: the PLC reads the data of the current power-off timer, judges whether the power-off time meets the recovery requirement, if so, executes S4, and if not, stops the machine for alarming;
s4: when the load equipment is powered off and the PLC is powered off in the step S1, and the load equipment is not powered off and the PLC is powered off, the PLC reads the working state before the power failure and then executes S5; when the load equipment is powered off and the PLC is not powered off, executing the step S5; the PLC reads the working state before power failure, wherein the working state comprises power, current and working steps;
s5: when the load equipment is not powered off and the PLC is powered off, the recovery is directly finished; when the load equipment is powered off, the PLC is powered off or the load equipment is powered off and the PLC is not powered off, the PLC judges the current state, if the current state meets the working condition, the recovery is finished, and if the current state does not meet the working condition, S6 is executed;
s6: the PLC controls the power to be increased, so that the current power is gradually increased to the standard power;
s7: and (5) the working condition is recovered to be normal, and the recovery is finished.
2. The method for recovering the working state of the continuous heating control device after short-time power failure according to claim 1, wherein the method comprises the following steps: in the step S6, the PLC recovers to gradually increase the current power to be greater than the standard power and less than the maximum power within the safety range, and shields the alarm signal generated when the current power is greater than the standard power; in step S7, after the operating condition is recovered to normal, the current power is reduced to make the current power equal to the standard power.
3. The method for recovering the working state of the continuous heating control device after short-time power failure as claimed in claim 1, characterized in that: whether the working step judged in the step S2 meets the recovery requirement is specifically that when the working step is in the step of boosting or stabilizing the voltage, the shutdown alarm is performed, and if the working step is not in the step of boosting or stabilizing the voltage, the step S3 is executed.
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| CN202010968500.XA CN112099429B (en) | 2020-09-15 | 2020-09-15 | Working state recovery method for short-time power failure of continuous heating control equipment |
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| CN202010968500.XA CN112099429B (en) | 2020-09-15 | 2020-09-15 | Working state recovery method for short-time power failure of continuous heating control equipment |
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| CN112099429B true CN112099429B (en) | 2022-08-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2982294B2 (en) * | 1990-11-15 | 1999-11-22 | オムロン株式会社 | Instantaneous power failure time detection method for programmable controller |
| KR100434137B1 (en) * | 1998-01-31 | 2004-08-31 | 엘지산전 주식회사 | Speed search method for inverter system, for smoothly operating motor when power is re-supplied after instantaneous power outage |
| US8710406B2 (en) * | 2008-09-19 | 2014-04-29 | Conair Corporation | Safety device and method for electric heating appliances |
| CN104678831B (en) * | 2014-09-12 | 2017-08-04 | 广东美的厨房电器制造有限公司 | Electric cooking pot and its power interruption recovering device and power interruption recovering controlling method |
| JP6506199B2 (en) * | 2016-03-18 | 2019-04-24 | ファナック株式会社 | Machine Tools |
| CN108236342B (en) * | 2016-12-23 | 2020-05-05 | 佛山市顺德区美的电热电器制造有限公司 | Cooking equipment and control method and device thereof after power failure |
| CN206808651U (en) * | 2017-06-15 | 2017-12-29 | 云南中海路德清洁技术有限公司 | Heat pump tobacco leaf baking system |
| CN108433515A (en) * | 2018-02-02 | 2018-08-24 | 深圳市赛亿科技开发有限公司 | Electric cooker and its power interruption recovering controlling method |
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