CN112731893A - Unit remote emergency stop device and control method thereof - Google Patents
Unit remote emergency stop device and control method thereof Download PDFInfo
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- CN112731893A CN112731893A CN202110119034.2A CN202110119034A CN112731893A CN 112731893 A CN112731893 A CN 112731893A CN 202110119034 A CN202110119034 A CN 202110119034A CN 112731893 A CN112731893 A CN 112731893A
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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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4188—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by CIM planning or realisation
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/001—Functional circuits, e.g. logic, sequencing, interlocking circuits
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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
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- 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
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Abstract
The invention belongs to the technical field of emergency stop control of a production line, and particularly discloses a unit remote emergency stop device and a control method thereof, wherein an indicator lamp L1/L2/L3/L4/L5, an emergency stop button JT1/JT2, an enabling selection switch SA, a Test button Test, an uninterruptible power supply UPS0, a power supply module PS0, an integrated controller PLC0 and a photoelectric conversion module 0LM0 are arranged in a terminal box, an indicator lamp L7/L8/L9/L10/L11, an uninterruptible power supply UPS1, a power supply module PS1, an integrated controller PLC1 and a photoelectric conversion module LM0 1 are arranged in the emergency stop control box, the terminal box and the emergency stop control box are connected through optical cables, the indication and the detection judgment of the working state of the emergency stop control device are realized through logic programming, the indicator lamp and the Test button in the PLC, and the emergency stop of the remote unit is realized through the switch and the logic function conversion on the terminal box, the operability is strong.
Description
Technical Field
The invention belongs to the technical field of production line emergency stop control, and particularly relates to a remote emergency stop device applied to a production line unit and a control method thereof.
Background
With the development of industrial information technology and the requirement of industrial intensive management, more and more production lines are centralized and controlled together, and the trend that one person has more posts, production equipment is unmanned in operation and unattended in operation is realized. However, due to the development of detection technology, many systems need to reserve some emergency stop devices, so that emergency stop of equipment can be performed remotely in case of emergency such as personal, equipment, production and other accidents. Taking blast furnace dust removal centralized control as an example, seven dust removal systems arranged in different procedures are centralized to a control center for control in order to adapt to a new production organization mode and achieve the purposes of reducing labor and improving efficiency. Each set of dust remover of the original design of the system comprises a set of emergency stop device, when accidents such as ash leakage, ash leakage and personnel safety accidents occur, an emergency stop switch is pressed down to cause an ash scraper, an assembling machine and a lifter of an ash conveying system to be in emergency stop, a normally closed point of the emergency stop device is connected in series with a control loop of a main loop of equipment, after the system is in centralized control, the farthest distance from a control center to a field control room is several kilometers, and the traditional mode can obviously not be realized.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides the remote emergency stop control equipment suitable for the production line, and the remote emergency stop control of the production line can be realized by replacing the traditional emergency stop device through remote control.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a unit remote emergency stop device comprises a terminal box and an emergency stop control box, wherein the emergency stop control box is embedded and installed on a control cabinet door (a hole is formed in the cabinet door), and the terminal box can be embedded and installed on an operation table (an operation table hole).
The terminal box comprises a terminal shell, a front end face of the terminal shell is opened in the front, a rear end face of the terminal shell is opened in the rear, a wire inlet hole is reserved in the side face, and the terminal box is connected with the emergency stop control box through an optical cable. The upper end of the front panel of the terminal shell is sequentially provided with an emergency stop unit 1 indicator lamp L1, an emergency stop unit 2 indicator lamp L2, a double-color indicator lamp L3, a test feedback normal indicator lamp L4 and a device normal/fault terminal indicator lamp L5, the emergency stop unit 1 indicator lamp L1 and the emergency stop unit 2 indicator lamp L2 can display the working state of the identification device, the double-color indicator lamp L3 displays red as an emergency stop operation indicator lamp, and the double-color indicator lamp L3 displays white as a switch locking indicator lamp.
The lower end of the front panel of the terminal shell is sequentially provided with a unit 1 emergency stop button JT1, a unit 2 emergency stop button JT2, an enabling selection switch SA and a Test button Test.
The rear panel of the terminal shell is provided with an uninterruptible power supply UPS0, a power supply module PS0, an integrated controller PLC0 and a photoelectric conversion module 0LM0, the power supply module PS0 is connected with one end of an emergency stop switch JT1, the other end of the emergency stop switch JT1 is connected with the integrated controller PLC0, the power supply module PS0 is connected with one end of an emergency stop switch JT2, and the other end of the emergency stop switch JT2 is connected with the integrated controller PLC 0.
The emergency stop control box comprises a box body, a front end face of the box body is opened forwards, a rear end face of the box body is opened backwards, a wire inlet hole is reserved in the side face, an emergency stop unit 1 indicator lamp L7, an emergency stop unit 2 indicator lamp L8, an emergency stop effective indicator lamp L9, a device test indicator lamp L10 and a device normal/fault indicator lamp L11 are arranged on a front panel of the box body, and the emergency stop unit 1 indicator lamp L7 and the emergency stop unit 2 indicator lamp L8 can display the working state of an identification device.
An uninterruptible power supply UPS1, a power supply module PS1, an integrated controller PLC1 and a photoelectric conversion module 0LM1 are mounted on the rear panel of the box body, the power supply module PS1 is respectively connected with relays KA1-6, normally closed contacts of the relays KA1-6 are connected with a control loop of the control box in series, and the relays KA1-6 are connected with the integrated controller PLC 1. A normally closed contact of a relay KA1-6 is used for replacing an emergency stop switch, and the relay is connected with a communication device.
In order to realize the remote and reliable communication between the terminal box and the emergency stop control box, the photoelectric conversion module 0LM0 is connected with the photoelectric conversion module 0LM1 through an optical cable, the photoelectric conversion module 0LM0 is connected with the integrated controller PLC0, and the photoelectric conversion module 0LM1 is connected with the integrated controller PLC 1.
In order to improve the stability and realize the reliable conversion of partial logic functions, the integrated controller PLC0 uses an integrated small PLC with a communication interface, the integrated controller PLC0 at least comprises 8 digital quantity input points and 12 digital quantity output points, and the power module PS0 supplies power.
In order to improve the stability and realize the reliable conversion of partial logic functions, the integrated controller PLC1 uses an integrated small PLC with a communication interface, the integrated controller PLC1 at least comprises 8 digital quantity input points and 12 digital quantity output points, and the power module PS1 supplies power.
The uninterruptible power supply UPS0 is a small rail-type UPS, and the terminal box can be used normally even in an abnormal situation.
Uninterrupted power source UPS1 is small-size guide rail type UPS, and under abnormal conditions, scram control box also can normal use.
When all the states are detected normally, a normal/fault terminal indicator lamp L5 and a normal/fault indicator lamp L11 of the terminal box are normally lightened; when any one of the parameters is abnormal, the states of the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 are programmed through a PLC, and the device normal/fault indicator lamp L11 flashes at the frequency of 1Hz through comprehensive judgment such as reading the network state, instructing the corresponding state and the like.
When the equipment is in normal condition, will enable selector switch SA and revolve to output locking state, double-colored pilot lamp L3 shows white, and relay KA1-6 is all not electrified.
When the unit 1 needs emergency stop, the enable selection switch SA is rotated to the emergency stop direction, the double-color indicator lamp L3 displays red, and the emergency stop effective indicator lamp L9 is lightened.
If the unit 1 needs emergency stop, pressing a unit 1 emergency stop button JT1, KA1-3 to act, cutting off a main loop of equipment corresponding to the unit 1, and turning on an emergency stop unit 1 indicator lamp L1 and an emergency stop unit 1 indicator lamp L7.
If the unit 2 needs emergency stop, pressing a unit 2 emergency stop button JT2, KA4-6 to act, cutting off a main loop of equipment corresponding to the unit 2, and turning on an emergency stop unit 2 indicator lamp L2 and an emergency stop unit 2 indicator lamp L8.
When an emergency stop instruction is in progress, if network interruption occurs, the emergency stop control box continuously keeps the current state, the emergency stop effective indicator lamp L9 flickers at the frequency of 1Hz, and the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 both flickers at the frequency of 1 Hz; after the network is recovered, the judgment is carried out again, and the emergency stop effective indicator lamp L9 recovers the normal indication.
In any state, a Test button Test is pressed, the terminal box automatically sends a Test instruction to the integrated controller PLC1, the output state is detected, and in a normal state, the Test feedback normal indicator lamp L4 and the device Test indicator lamp L10 are both lightened; when the test is abnormal, the test feedback normal indicator light L4 and the device test indicator light L10 both flash at the frequency of 1 Hz.
According to the emergency stop control system, the relay and the emergency stop switch are arranged, the stop function of the traditional emergency stop switch is effectively replaced, an operator can remotely control the emergency stop of a production line, the emergency stop of a remote unit is realized by PLC logic function conversion, and the emergency stop control system is high in operability and good in practical effect.
Drawings
Fig. 1 is a schematic view of a connection structure of a terminal box and an emergency stop control box.
Fig. 2 is a schematic front view of the terminal box.
Fig. 3 is a schematic front structure diagram of the emergency stop control box.
Fig. 4 is a schematic diagram of the control principle of the terminal enclosure of fig. 1.
Fig. 5 is a schematic control principle diagram of the emergency stop control box in fig. 1.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-5, a remote emergency stop device for a unit comprises a terminal box Z-BX and an emergency stop control box JT-BX, wherein the emergency stop control box is embedded in a control cabinet door (an opening is formed in the cabinet door), and the terminal box can be embedded in an operation console (an opening is formed in the operation console).
The terminal box Z-BX comprises a terminal shell, a front end face of the terminal shell is opened, a rear end face of the terminal shell is opened, a side face of the terminal shell is provided with a wire inlet hole, and the terminal box is connected with the emergency stop control box through an optical cable. The upper end of the front panel of the terminal shell is sequentially provided with an emergency stop unit 1 indicator lamp L1, an emergency stop unit 2 indicator lamp L2, a double-color indicator lamp L3, a test feedback normal indicator lamp L4 and a device normal/fault terminal indicator lamp L5; the lower end of the front panel of the terminal shell is sequentially provided with a unit 1 emergency stop button JT1, a unit 2 emergency stop button JT2, an enabling selection switch SA and a Test button Test; uninterrupted power source UPS0 is equipped with on the rear panel of terminal housing, power module PS0, integrated controller PLC0 and photoelectric conversion module 0LM0, power module PS0 links to each other with the one end of scram switch JT1, the other end of scram switch JT1 links to each other with integrated controller PLC0, power module PS0 links to each other with the one end of scram switch JT2, the other end of scram switch JT2 links to each other with integrated controller PLC0, integrated controller PLC0 is small-size integrated PLC, contain 8 digital quantity input points and 12 digital quantity output points at least.
And an emergency stop switch and a communication device corresponding to the field unit are arranged on the terminal box, so that the remote control of the emergency stop device is realized.
In order to prevent the misoperation, an enable selection switch SA and a two-color indicator lamp L3 are installed on the terminal box, the two-color indicator lamp L3 displays red as an emergency stop operation indicator lamp, and the two-color indicator lamp L3 displays white as a switch locking indicator lamp.
The JT-BX comprises a box body, a front end face of the box body is opened in the front, a rear end face of the box body is opened in the rear, a wire inlet hole is reserved in the side, and a front panel of the box body is provided with an emergency stop unit 1 indicator lamp L7, an emergency stop unit 2 indicator lamp L8, an emergency stop effective indicator lamp L9, a device test indicator lamp L10 and a device normal/fault indicator lamp L11; an uninterruptible power supply UPS1, a power supply module PS1, an integrated controller PLC1 and a photoelectric conversion module 0LM1 are arranged on a rear panel of the box body, and the power supply module PS1 is respectively connected with relays KA1, KA2, KA3, KA4, KA5 and KA 6.
Wherein, the relays KA1, KA2 and KA3 are a group, that is, the output relay of the emergency stop unit 1, and the normally closed contacts corresponding to the relays KA1, KA2 and KA3 are respectively connected in series to the control loop of the main loop of the equipment (such as the scraper 1, the gathering machine 1 and the elevator 1 on one side of the blast furnace dust remover) corresponding to the unit 1; the KA4, KA5 and KA6 are a group, namely, the output relay of the emergency stop unit 2, and the normally closed contacts corresponding to the relays KA4, KA5 and KA6 are respectively connected in series to the control loop of the main loop of the equipment (such as the scraper 2, the gathering machine 2 and the elevator 2 on one side of the blast furnace dust remover) corresponding to the unit 2.
Normally closed contacts of the relays KA1, KA2, KA3, KA4, KA5 and KA6 are connected with a control box control loop in series, the relays KA1, KA2, KA3, KA4, KA5 and KA6 are connected with the integrated controller PLC1, the integrated controller PLC1 is a small integrated PLC and at least comprises 8 digital quantity input points and 12 digital quantity output points, normally closed contacts of the relays KA1, KA2, KA3, KA4, KA5 and KA6 are used for replacing an emergency stop switch, and the relays are connected with the communication device.
In order to realize the remote and reliable communication between the terminal box and the emergency stop control box, the photoelectric conversion module 0LM0 is connected with the photoelectric conversion module 0LM1 through an optical cable, the photoelectric conversion module 0LM0 is connected with the integrated controller PLC0, and the photoelectric conversion module 0LM1 is connected with the integrated controller PLC 1.
In order to improve the stability and realize the reliable conversion of partial logic functions, the integrated controller PLC0 uses an integrated small PLC with a communication interface, the integrated controller PLC0 at least comprises 8 digital quantity input points and 12 digital quantity output points, and the power module PS0 supplies power.
In order to improve the stability and realize the reliable conversion of partial logic functions, the integrated controller PLC1 uses an integrated small PLC with a communication interface, the integrated controller PLC1 at least comprises 8 digital quantity input points and 12 digital quantity output points, and the power module PS1 supplies power.
The uninterruptible power supply UPS0 is a small rail-type UPS, and the terminal box can be used normally even in an abnormal situation.
Uninterrupted power source UPS1 is small-size guide rail type UPS, and under abnormal conditions, scram control box also can normal use.
When all the states are detected normally, a normal/fault terminal indicator lamp L5 and a normal/fault indicator lamp L11 of the terminal box are normally lightened; when any one of the parameters is abnormal, the states of the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 are programmed through a PLC, and the device normal/fault indicator lamp L11 flashes at the frequency of 1Hz through comprehensive judgment such as reading the network state, instructing the corresponding state and the like.
When the equipment is in a normal condition, the enabling selection switch SA is rotated to an output locking state, the two-color indicator lamp L3 displays white, and the relays KA1, KA2, KA3, KA4, KA5 and KA6 are not powered.
Normally, the enable selection switch SA is turned to the "output lock" state, and at this time, the two-color indicator lamp L3 is displayed in white, and the relays KA1, KA2, KA3, KA4, KA5, and KA6 are all kept stationary (not powered).
When the unit 1 needs to be stopped suddenly (for example, a dust leakage phenomenon is found through video monitoring, or a personal accident occurs, or a scheduling instruction is sent out), the enable selection switch SA is rotated to the sudden stop direction (when the unit is rotated to the left side, the sudden stop output is effective, and when the unit is rotated to the right side, the output is locked), the double-color indicator light L3 displays red, and the sudden stop effective indicator light L9 is turned on. Meanwhile, an emergency stop button of the unit 1 is pressed, and at the moment, the relays KA1, KA2 and KA3 act to cut off a main loop (such as the scraper 1, the gathering machine 1 and the elevator 1) of the corresponding equipment of the unit 1. Meanwhile, an indicator lamp L1 of the emergency stop unit 1 and an indicator lamp L7 of the emergency stop unit 1 are turned on. And the principle of action is the same as that when the unit 2 needs to be stopped suddenly.
If the unit 1 needs emergency stop, pressing a unit 1 emergency stop button JT1, enabling relays KA1, KA2 and KA3 to act, cutting off a main loop of equipment corresponding to the unit 1, and enabling an emergency stop unit 1 indicator lamp L1 and an emergency stop unit 1 indicator lamp L7 to be turned on.
If the unit 2 needs emergency stop, a unit 2 emergency stop button JT2 is pressed, relays KA4, KA5 and KA6 act to cut off a main loop of equipment corresponding to the unit 2, and an emergency stop unit 2 indicator lamp L2 and an emergency stop unit 2 indicator lamp L8 are turned on.
When an emergency stop instruction is in progress, if network interruption occurs, the emergency stop control box continuously keeps the current state, the emergency stop effective indicator lamp L9 flickers at the frequency of 1Hz, and the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 both flickers at the frequency of 1 Hz; after the network is recovered, the judgment is carried out again, and the emergency stop effective indicator lamp L9 recovers the normal indication.
To ensure the availability of the device, the Test button Test is pressed to confirm the availability of the entire device by detecting the output state of the integrated controller PLC 1. In a normal state, the test feedback normal indicator lamp L4 and the device test indicator lamp L10 are lit, and in an abnormal test, the test feedback normal indicator lamp L4 and the device test indicator lamp L10 blink at a frequency of 1 Hz.
After normal power transmission is carried out, the power supply module PS0 supplies power to the integrated controller PLC0 and the photoelectric conversion module 0LM0, network detection, communication detection and watchdog programs are respectively compiled in the integrated controller PLC0 and the integrated controller PLC1, when all states are detected normally, the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 are normally lighted, and when any one parameter is abnormal, the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 flicker at the frequency of 1 Hz.
According to the emergency stop control system, the relay and the emergency stop switch are arranged, the stop function of the traditional emergency stop switch is effectively replaced, an operator can remotely control the emergency stop of a production line, and the emergency stop control system is high in operability and good in practical effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included therein.
Claims (4)
1. A unit remote emergency stop device is characterized by comprising a terminal box and an emergency stop control box, wherein the terminal box comprises a terminal shell, an emergency stop unit 1 indicator lamp L1, an emergency stop unit 2 indicator lamp L2, a double-color indicator lamp L3, a Test feedback normal indicator lamp L4 and a device normal/fault terminal indicator lamp L5 are sequentially mounted at the upper end of a front panel of the terminal shell, and a unit 1 emergency stop button JT1, a unit 2 emergency stop button JT2, an enable selection switch SA and a Test button Test are sequentially mounted at the lower end of the front panel of the terminal shell;
an uninterruptible power supply UPS0, a power supply module PS0, an integrated controller PLC0 and a photoelectric conversion module 0LM0 are mounted on the rear panel of the terminal shell, the power supply module PS0 is connected with one end of an emergency stop switch JT1, the other end of the emergency stop switch JT1 is connected with the integrated controller PLC0, the power supply module PS0 is connected with one end of an emergency stop switch JT2, and the other end of the emergency stop switch JT2 is connected with the integrated controller PLC 0;
the emergency stop control box comprises a box body, wherein an emergency stop unit 1 indicator lamp L7, an emergency stop unit 2 indicator lamp L8, an emergency stop effective indicator lamp L9, a device test indicator lamp L10 and a device normal/fault indicator lamp L11 are arranged on a front panel of the box body;
an uninterruptible power supply UPS1, a power supply module PS1, an integrated controller PLC1 and a photoelectric conversion module 0LM1 are mounted on the rear panel of the box body, the power supply module PS1 is respectively connected with a relay KA1-6, a normally closed contact of the relay KA1-6 is connected with a control loop of the control box in series, and the relay KA1-6 is connected with the integrated controller PLC 1;
the photoelectric conversion module 0LM0 is connected with the photoelectric conversion module 0LM1 through an optical cable.
2. The remote emergency stop device of claim 1, wherein said PLC0 comprises at least 8 digital input points and 12 digital output points.
3. The remote emergency stop device of claim 1, wherein said PLC1 comprises at least 8 digital input points and 12 digital output points.
4. The remote emergency stop control method of a unit according to claim 1,
when all the states are detected normally, a normal/fault terminal indicator lamp L5 and a normal/fault indicator lamp L11 of the terminal box are normally lightened; when any one of the parameters is abnormal, the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 flicker at the frequency of 1 Hz;
when the equipment is in a normal condition, the enabling selection switch SA is rotated to an output locking state, the two-color indicator lamp L3 displays white, and the relay KA1-6 is not powered;
when the unit 1 needs emergency stop, the enabling selection switch SA is rotated to the emergency stop direction, the double-color indicator lamp L3 displays red, and the emergency stop effective indicator lamp L9 is lightened;
if the unit 1 needs emergency stop, pressing a unit 1 emergency stop button JT1, KA1-3 to act, cutting off a main loop of equipment corresponding to the unit 1, and turning on an emergency stop unit 1 indicator lamp L1 and an emergency stop unit 1 indicator lamp L7;
if the unit 2 needs emergency stop, pressing a unit 2 emergency stop button JT2, KA4-6 to act, cutting off a main loop of equipment corresponding to the unit 2, and turning on an emergency stop unit 2 indicator lamp L2 and an emergency stop unit 2 indicator lamp L8;
when an emergency stop instruction is in progress, if network interruption occurs, the emergency stop control box continuously keeps the current state, the emergency stop effective indicator lamp L9 flickers at the frequency of 1Hz, and the device normal/fault terminal indicator lamp L5 and the device normal/fault indicator lamp L11 both flickers at the frequency of 1 Hz; after the network is recovered, judging again, and recovering normal indication by an emergency stop effective indicator lamp L9;
in any state, a Test button Test is pressed, the terminal box automatically sends a Test instruction to the integrated controller PLC1, the output state is detected, and in a normal state, the Test feedback normal indicator lamp L4 and the device Test indicator lamp L10 are both lightened; when the test is abnormal, the test feedback normal indicator light L4 and the device test indicator light L10 both flash at the frequency of 1 Hz.
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| CN202110119034.2A CN112731893A (en) | 2021-01-28 | 2021-01-28 | Unit remote emergency stop device and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113436924A (en) * | 2021-06-21 | 2021-09-24 | 杭州微联智控科技有限公司 | Automatic reset emergency stop device and control method |
| CN114394027A (en) * | 2022-02-22 | 2022-04-26 | 国网安徽电动汽车服务有限公司 | Method for guaranteeing remote restart safety of electric automobile charging pile |
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