CN103019148A - Method for starting and stopping single equipment controlled by double relays - Google Patents
Method for starting and stopping single equipment controlled by double relays Download PDFInfo
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- CN103019148A CN103019148A CN2012104677587A CN201210467758A CN103019148A CN 103019148 A CN103019148 A CN 103019148A CN 2012104677587 A CN2012104677587 A CN 2012104677587A CN 201210467758 A CN201210467758 A CN 201210467758A CN 103019148 A CN103019148 A CN 103019148A
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Abstract
The invention relates to a method for starting and stopping single equipment controlled by double relays, comprising the following steps of: (1) connecting an equipment main contactor control coil, a starting relay normally open contact, a stopping relay normally open contact and a power supply in series, and meanwhile, connecting a main contactor auxiliary contact with the starting relay normally open contact in series; (2) connecting the starting relay normally open contact with a starting output module of a PLC (Programmable Logic Controller) industrial personal computer, and connecting the stopping relay normally open contact with a halting output module in the PLC industrial personal computer; and (3) switching on the power supply, when the starting relay normally open contact is sucked instantly, sucking the equipment main contactor control coil, so as to realize a self-locking function and start the equipment, when the starting relay normally open contact is switched off, still sucking the equipment main contactor control coil through self locking and keeping the equipment at an operation state, when the stopping relay normally open contact is switched off, enabling the main contactor control coil to lose power and halting the equipment, and meanwhile, removing the self locking of the main contactor auxiliary contact. The method disclosed by the invention can effectively guarantee the normal operation of the equipment.
Description
Technical field
The present invention relates to a kind of method of controlling the single devices start and stop, relate in particular to the method for a kind of double relay control single devices start and stop.
Background technology
In the normal production of factory, the start and stop of general electrical equipment (such as water pump, small-sized fan) all adopt single relay to control by PLC, and concrete mode is: PLC sends enabled instruction, relay adhesive, equipment operation; The PLC enabled instruction disappears, and relay disconnects, and equipment stops.Such design defect is: when the deadlock of PLC processor, output template outage or damage, owing to coil is burnt in the long-time adhesive of relay; Perhaps make coil losing electricity because of the relay electricity shortage; This all can cause equipment out of service, to such an extent as to impact is produced.And these faults of above-mentioned appearance belong to catastrophic discontinuityfailure, can't predict in advance, and the equipment point-detecting maintainer also can't go to avoid by effective means, can only correction maintenance, and so just make the plant maintenance personnel very passive in routine duties.
For dealing with this a series of faults, prevent that processor from crashing and module damage, can take to allow PLC equipment do good ground connection and fixed cycle interruption maintenance; Prevent that Relay Aging from can take regularly pilot relay to be changed; Prevent output template 24V power down, can strengthen spot check, test to the 24V of system power supply, but these means can only be use up the generation that maximum limit lowers this type of accident, can not avoid fully.
In order to stop the generation of such fault fully, need to guarantee that main contactor can be kept attracting state by auto-lock function, prevents equipment downtime when opertaing device and power supply break down.
Summary of the invention
Technical matters to be solved by this invention provides the method for the double relay control single devices start and stop of the normal operation of a kind of effective assurance equipment.
For addressing the above problem, the method for a kind of double relay control single devices of the present invention start and stop may further comprise the steps:
⑴ connect equipment main contactor control coil, starting relay normally opened contact, slew relay normally closed contact with 220V power supply AC, simultaneously that the main contactor auxiliary contact are in parallel with described starting relay normally opened contact;
⑵ the startup output module in described starting relay normally opened contact and the PLC industrial computer joins; Shutdown output module in described slew relay normally closed contact and the PLC industrial computer joins;
⑶ connect described 220V power supply AC, and when starting relay normally opened contact adhesive moment, described equipment main contactor control coil adhesive is also finished auto-lock function, device start by described main contactor auxiliary contact; When the starting relay normally opened contact disconnected, described equipment main contactor control coil was by self-locking still adhesive, and equipment keeps running status; When the disconnection of slew relay normally closed contact, described main contactor control coil dead electricity, equipment downtime is removed the self-locking of described main contactor auxiliary contact simultaneously.
Starting relay normally opened contact among the described step ⑴ and the actuating signal of described slew relay normally closed contact all keep 1s.
Self-locking logic between main contactor auxiliary contact among the described step ⑴ and the described starting relay normally opened contact is the relation of "or".
The present invention compared with prior art has the following advantages:
1, the present invention changes the mode that traditional single relay controller opens/stops, use the control of double relay pulse signal instead, namely device start signal and stopping signal respectively adopt a Control, also be to adopt 2 output points to control in PLC output, and pulse singaling is all adopted in the startup that provides and halt instruction, equipment starts when normal operation and slew relay is in power failure state, can avoid relay owing to long-term charged adhesive is accelerated to wear out; And when the normal operation of equipment and relay all are in power failure state; even PLC system blackout, processor crash, output template damages and power down can not cause the fault of disorderly closedown to occur; can effectively guarantee the operation of equipment, avoid impact to produce.
2, the present invention utilizes the main contactor auxiliary contact to finish self-locking, when control system breaks down, can because the pilot relay dead electricity causes equipment downtime, can not be widely used in the operations such as pump works, blower fan of cooling tower.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is electric diagram of the present invention.
Among the figure: 1-equipment main contactor control coil, 2-starting relay normally opened contact, 3-slew relay normally closed contact, 4-220V power supply AC, 5-main contactor auxiliary contact.
Embodiment
The method of a kind of double relay control single devices start and stop may further comprise the steps:
⑴ connect equipment main contactor control coil 1, starting relay normally opened contact 2, slew relay normally closed contact 3 with 220V power supply AC4, simultaneously with main contactor auxiliary contact 5 and starting relay normally opened contact 2 (as shown in Figure 1) in parallel.
Wherein:
Starting relay normally opened contact 2 all keeps 1s with the actuating signal of slew relay normally closed contact 3.
Self-locking logic between main contactor auxiliary contact 5 and the starting relay normally opened contact 2 is the relation of "or".
⑵ the startup output module in starting relay normally opened contact 2 and the PLC industrial computer joins; Shutdown output module in slew relay normally closed contact 3 and the PLC industrial computer joins.
⑶ connect 220V power supply AC4, and when 2 adhesive moments of starting relay normally opened contact, 1 adhesive of equipment main contactor control coil is also finished auto-lock function, device start by main contactor auxiliary contact 5; When starting relay normally opened contact 2 disconnected, equipment main contactor control coil 1 was by self-locking still adhesive, and equipment keeps running status; When 3 disconnections of slew relay normally closed contact, main contactor control coil 1 dead electricity, equipment downtime is removed the self-locking of main contactor auxiliary contact 5 simultaneously.
Claims (3)
1. the method for double relay control single devices start and stop may further comprise the steps:
⑴ with equipment main contactor control coil (1), starting relay normally opened contact (2), slew relay normally closed contact (3) and 220V power supply AC(4) connect, simultaneously that main contactor auxiliary contact (5) are in parallel with described starting relay normally opened contact (2);
⑵ the startup output module in described starting relay normally opened contact (2) and the PLC industrial computer joins; Shutdown output module in described slew relay normally closed contact (3) and the PLC industrial computer joins;
⑶ connect described 220V power supply AC(4), when starting relay normally opened contact (2) adhesive moment, described equipment main contactor control coil (1) adhesive is also finished auto-lock function, device start by described main contactor auxiliary contact (5); When starting relay normally opened contact (2) disconnected, described equipment main contactor control coil (1) was by self-locking still adhesive, and equipment keeps running status; When slew relay normally closed contact (3) disconnection, described main contactor control coil (1) dead electricity, equipment downtime is removed the self-locking of described main contactor auxiliary contact (5) simultaneously.
2. a kind of double relay as claimed in claim 1 is controlled the method for single devices start and stop, it is characterized in that: the starting relay normally opened contact (2) among the described step ⑴ all keeps 1s with the actuating signal of described slew relay normally closed contact (3).
3. a kind of double relay as claimed in claim 1 is controlled the method for single devices start and stop, and it is characterized in that: the main contactor auxiliary contact (5) among the described step ⑴ and the self-locking logic between the described starting relay normally opened contact (2) are the relation of "or".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104677587A CN103019148A (en) | 2012-11-20 | 2012-11-20 | Method for starting and stopping single equipment controlled by double relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104677587A CN103019148A (en) | 2012-11-20 | 2012-11-20 | Method for starting and stopping single equipment controlled by double relays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103019148A true CN103019148A (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104677587A Pending CN103019148A (en) | 2012-11-20 | 2012-11-20 | Method for starting and stopping single equipment controlled by double relays |
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| CN (1) | CN103019148A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976900A (en) * | 2015-06-24 | 2015-10-14 | 吴倩颖 | Running controller of heating furnace |
| CN105416715A (en) * | 2015-12-14 | 2016-03-23 | 贵州中烟工业有限责任公司 | Tobacco carton delivery and packing machine interconnected control device and tobacco carton production line |
| CN107676900A (en) * | 2017-10-17 | 2018-02-09 | 上海市安装工程集团有限公司 | A kind of low-temperature receiver control system and its application method |
| CN115857310A (en) * | 2023-03-03 | 2023-03-28 | 三一氢能有限公司 | Control system and control method of electrolysis equipment and electrolysis equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2500011Y (en) * | 2001-08-28 | 2002-07-10 | 石家庄铁路分局邯郸给水电力段 | PLC controller of 10KV line failure automatic cut-off device |
| CN2806011Y (en) * | 2005-08-01 | 2006-08-16 | 万向钱潮股份有限公司 | Automatic clamping device for taiwan broaching machine |
| CN202240688U (en) * | 2011-08-23 | 2012-05-30 | 上海汇众汽车制造有限公司 | Automatic switching device of safety protective door of machine tool equipment |
-
2012
- 2012-11-20 CN CN2012104677587A patent/CN103019148A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2500011Y (en) * | 2001-08-28 | 2002-07-10 | 石家庄铁路分局邯郸给水电力段 | PLC controller of 10KV line failure automatic cut-off device |
| CN2806011Y (en) * | 2005-08-01 | 2006-08-16 | 万向钱潮股份有限公司 | Automatic clamping device for taiwan broaching machine |
| CN202240688U (en) * | 2011-08-23 | 2012-05-30 | 上海汇众汽车制造有限公司 | Automatic switching device of safety protective door of machine tool equipment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976900A (en) * | 2015-06-24 | 2015-10-14 | 吴倩颖 | Running controller of heating furnace |
| CN105416715A (en) * | 2015-12-14 | 2016-03-23 | 贵州中烟工业有限责任公司 | Tobacco carton delivery and packing machine interconnected control device and tobacco carton production line |
| CN105416715B (en) * | 2015-12-14 | 2020-08-07 | 贵州中烟工业有限责任公司 | Interlocking control device for cigarette conveying and packaging machine and cigarette production line |
| CN107676900A (en) * | 2017-10-17 | 2018-02-09 | 上海市安装工程集团有限公司 | A kind of low-temperature receiver control system and its application method |
| CN115857310A (en) * | 2023-03-03 | 2023-03-28 | 三一氢能有限公司 | Control system and control method of electrolysis equipment and electrolysis equipment |
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Application publication date: 20130403 |
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| RJ01 | Rejection of invention patent application after publication |