CN113759821A - PLC control circuit for continuous casting ladle manipulator - Google Patents
PLC control circuit for continuous casting ladle manipulator Download PDFInfo
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- CN113759821A CN113759821A CN202111153768.9A CN202111153768A CN113759821A CN 113759821 A CN113759821 A CN 113759821A CN 202111153768 A CN202111153768 A CN 202111153768A CN 113759821 A CN113759821 A CN 113759821A
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- continuous casting
- switch
- casting ladle
- digital coding
- control circuit
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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
- G05B19/054—Input/output
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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
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1184—Test ability of input for on, off capability
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- Automation & Control Theory (AREA)
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Abstract
The invention relates to a PLC control circuit and a method for a continuous casting ladle manipulator, wherein the control circuit comprises a plurality of limit switches, one end of each limit switch is connected with the enabling end of a corresponding digital coding switch, the other end of each limit switch is connected with the input end of the corresponding digital coding switch, and a plurality of output ends of the digital coding switches are correspondingly connected with data receiving channels of a PLC system one by one through data lines. The invention can reduce the number of connecting circuits and effectively reduce the error rate of the circuits.
Description
Technical Field
The invention relates to the technical field of control circuits of continuous casting steel covering manipulators, in particular to a PLC (programmable logic controller) control circuit for a continuous casting steel covering manipulator.
Background
The continuous casting ladle manipulator consists of ladle arms and ladle hand covers, wherein the ladle arms are arranged on two sides of a ladle revolving platform, and the ladle hand covers are arranged in the middle of the ladle revolving platform. The ladle receiving and lifting device simulates the actions of human hands, receives or sends out a ladle by using a ladle arm, and puts and keeps the cover of the ladle by using a ladle hand cover or lifts and lifts the ladle by using the ladle hand cover. Because the manipulator action is complicated, spacing is many, consequently needs a plurality of limit switch. The signal that current limit switch got into the PLC system, a point of limit switch corresponds an input contact of PLC system, causes the increase of PLC system input module quantity. The circuit that current limit switch got into the PLC system, and the PLC system is all introduced alone to the limit switch circuit, and the circuit is numerous alternately repeatedly, and the wiring need be followed slip ring terminal case and lead wire to each spacing alone in addition, often appears the circuit and is not right, the mistake that the position is unclear, makes the signal of continuous casting ladle manipulator check repeatedly, overhauls very inconvenient for electrical construction and circuit.
Disclosure of Invention
The invention aims to provide a PLC control circuit for a continuous casting ladle manipulator, which can reduce the number of connecting circuits and effectively reduce the error rate of the circuits.
The technical scheme adopted by the invention for solving the technical problems is as follows: the PLC control circuit for the continuous casting ladle manipulator comprises a plurality of limit switches, wherein one end of each limit switch is connected with an enabling end of a corresponding digital coding switch, the other end of each limit switch is connected with an input end of the corresponding digital coding switch, and a plurality of output ends of the digital coding switches are connected with data receiving channels of a PLC system in a one-to-one correspondence mode through data lines.
And each output end of the digital coding switch is connected with a diode.
Each output end of the digital coding switch is connected with a current-limiting resistor.
The digital coding switch is a 7-bit binary digital coding switch.
The data line is provided with a quick connection plug-in.
The technical scheme adopted by the invention for solving the technical problems is as follows: the PLC control circuit comprises a setting stage and a using stage, wherein the setting stage comprises the following steps:
the setup phase comprises the steps of:
determining the number of receiving channels of a PLC system communicated with the digital coding switch according to the distribution condition of the continuous casting ladle manipulator;
determining the digit of the digital coding switch according to the action loop of the continuous casting ladle manipulator, setting an address code for each digital coding switch, and ensuring that each address code corresponds to one action of one limit switch;
the use phase comprises the following steps:
the PLC system reads the data received by the receiving channel;
and comparing the data with the address code, and determining the position of the limit switch according to the comparison result so as to obtain the action condition of the continuous casting ladle manipulator.
Advantageous effects
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: the invention codes the on and off of the limit switch through the digital coding switch, and the coding switch is input into the PLC system through the data line to identify the position of the limit switch.
Drawings
Fig. 1 is a circuit diagram of an embodiment of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The embodiment of the invention relates to a PLC control circuit for a continuous casting ladle manipulator, which comprises 8 limit switches 1, wherein one end of each limit switch 1 is connected with an enabling end of a corresponding digital coding switch 2, the other end of each limit switch 1 is connected with an input end of the digital coding switch 2, and a plurality of output ends of the digital coding switches 2 are correspondingly connected with data receiving channels of a PLC system 3 through data lines. Each output end of the digital coding switch 2 is connected with a diode 4 and a current-limiting resistor 5, current backflow can be prevented by arranging the diode 4, and overcurrent can be prevented by arranging the current-limiting resistor 5. In order to facilitate the operation, the data line in this embodiment is the data line 7 with the quick connection plug-in 6, so that the position coding switch or the data line can be replaced only by plugging and unplugging.
The 8 limit switches of the embodiment are respectively used for detecting that the ladle arm ascends in place, descends in place, the ladle hand cover is covered in place, the ladle hand cover is uncovered in place, the ladle hand cover is left-handed deceleration position, the ladle hand cover is right-handed deceleration position, the ladle hand cover is left-handed in place and the ladle hand cover is right-handed in place. The 8 limit switches are connected to 7 data receiving channels of the PLC system one by one through 8 digital coding switches, so that compared with the existing mode, the connection of the 8 limit switches can be realized through the 7 data receiving channels in the embodiment mode, and the existing mode can be realized only through the 8 data receiving channels.
The embodiment also relates to a control method adopting the PLC control circuit, which comprises a setting stage and a using stage.
Wherein the setup phase comprises the steps of: determining the number of receiving channels of a PLC system communicated with the digital coding switch according to the distribution condition of the continuous casting ladle manipulator; and determining the digit of the digital coding switches according to the action loop of the continuous casting ladle manipulator, setting an address code for each digital coding switch, and ensuring that each address code corresponds to one action of one limit switch.
The use stage comprises the following steps: the PLC system reads the data received by the receiving channel; and comparing the data with the address code, and determining the position of the limit switch according to the comparison result so as to obtain the action condition of the continuous casting ladle manipulator.
Specifically, the PLC control circuit for the continuous casting ladle manipulator according to this embodiment needs to encode the digital coding switch before use, so that the operation loops of each set of mechanical equipment are at different positions of the data line, and adopt independent signal transmission without mutual interference.
In this embodiment, the signals in place up and down of the ladle arm only occupy the numbers 1 and 2 of one group of channel data lines, the address code set by the digital coding switch when the ladle arm rises to the bit limit switch is 0000001, and the address code set by the digital coding switch when the ladle arm falls to the bit limit switch is 0000010. The signals of the hand cover placing and the hand cover lifting in place of the ladle only occupy the number 3 and the number 4 of one group of channel data wires, the digital coding switch of the hand cover placing and placing in place limit switch of the ladle is set to have the address code of 0000100, and the digital coding switch of the hand cover lifting and placing in place limit switch of the ladle is set to have the address code of 0001000. The steel ladle hand cover left and right rotation signals only occupy a group of channel data lines 5, 6 and 7, the address code set by the digital coding switch of the steel ladle hand cover left-handed reduction bit in-place limit switch is 0010000, the address code set by the digital coding switch of the steel ladle hand cover right-handed reduction bit in-place limit switch is 0100000, the address code set by the digital coding switch of the steel ladle hand cover left-handed reduction bit in-place limit switch is 0110000, and the address code set by the digital coding switch of the steel ladle hand cover right-handed reduction bit in-place limit switch is 1000000.
The number of the address code coding bits of the digital coding switch can be selected according to the number of limit action signals of the robot arm and the equipment and the condition of each branch circuit action loop. According to the calculation of the number of the action loops of the continuous casting ladle manipulator, 8 position coding switches and 8-core data wires are used. According to the coding mode, when the 7-bit binary digital coding switch is adopted, 127 position limit signals can be set at most, namely, the connection of 127 limit switches can be realized through 7 data receiving channels of the PLC system theoretically, the use amount of the PLC system input module is greatly reduced, and the cost is saved.
TABLE 1 Dial setting table for position coding switch of continuous casting ladle manipulator
In the embodiment, the digital coding switch of the continuous casting ladle manipulator adopts an action loop reading method: the action loops of each set of mechanical equipment adopt independent signal transmission at different positions of the data line, and do not interfere with each other.
When the power supply V + channel of the digital coding switch is 1, the binary code of the position coding switch can be effectively transmitted to carry out position identification.
When the binary code data channels of the PLC system receive signals D1 and D0 as 0 and 1, the PLC system recognizes that the ladle arm rises to the right position, and the data change of the channels D6, D5, D4, D3 and D2 is irrelevant to the ladle arm signal. When the PLC system binary code data channel receives signals that D1 and D0 are 1 and 0, the PLC system recognizes that the steel ladle arm descends to the position, and the data change of the channels D6, D5, D4, D3 and D2 is irrelevant to the steel ladle arm signal. When the PLC system receives the binary code data channels with D1 and D0 as 1 and 1, the PLC system identifies a steel ladle arm position error signal. When the binary code data channel of the PLC system receives signals that D3 and D2 are 0 and 1, the PLC system identifies a steel ladle hand cover put-in-place signal, and the data change of the channels D6, D5, D4, D1 and D0 is irrelevant to the steel ladle hand cover signal. When the PLC system binary code data channel receives signals that D3 and D2 are 1 and 0, the PLC system identifies a steel ladle hand cover lifting in-place signal, and data changes of the channels D6, D5, D4, D1 and D0 are irrelevant to the steel ladle hand cover signal. When the PLC system receives the binary code data channels with D3 and D2 as 1 and 1, the PLC system identifies a steel ladle hand cover position error signal. When the binary code data channels of the PLC system receive D6, D5 and D4 as 0, 0 and 1, the PLC system identifies the left-handed deceleration bit signal of the ladle hand cover, and the data change of the channels D3, D2, D1 and D0 is irrelevant to the ladle hand cover rotation signal. When the PLC system binary code data channel receives signals D6, D5 and D4 as 0, 1 and 0, the PLC system identifies a right-handed speed reduction bit signal of the steel ladle hand cover, and the data change of the channels D3, D2, D1 and D0 is irrelevant to a ladle hand cover rotation signal. When the binary code data channels of the PLC system receive signals that D6, D5 and D4 are 0, 1 and 1, the PLC system identifies a left-handed in-place signal of the steel ladle hand cover, and the data change of the channels D3, D2, D1 and D0 is irrelevant to a steel ladle hand cover rotating signal. When the PLC system binary code data channel receives signals that D6, D5 and D4 are 1, 0 and 0, the PLC system identifies a steel ladle hand cover right-handed rotation in-place signal, and data changes of the channels D3, D2, D1 and D0 are irrelevant to a steel ladle hand cover rotation signal. When the PLC system receives binary code data channels with D6, D5 and D4 as 1, 1 and 1, the PLC system identifies a steel ladle hand cover position error signal.
When the continuous casting ladle manipulator is connected with a ladle, the comprehensive data of the position coding switch is transmitted into a binary code of 0111001 of a signal of the PLC system. The PLC system reads the state of the continuous casting ladle manipulator as follows: the ladle hand cover 0110000 is rotated to the right, the ladle hand cover 0001000 is lifted to the right, and the ladle arm 0000001 is lifted to the right. When the continuous casting ladle manipulator pours the ladle, the signal of the comprehensive data of the position coding switch transmitted into the PLC system is 1000110 binary code. The PLC system reads the state of the continuous casting ladle manipulator as follows: 1000000 right-handed ladle cover, 0000100 right-handed ladle cover, and 0000010 down ladle arm. Therefore, the action loops of each set of mechanical equipment can be positioned at different positions of the data line through the digital coding switch, and independent signal transmission is adopted without mutual interference.
It should be noted that the digital coding switch on the same data signal transmission line can be flexibly used, when the rising and falling limit positions are found to be reversed, the line can be changed without changing the line and changing the limit, and the position error can be corrected only by correspondingly modifying the address of the digital coding switch, which is very convenient.
The digital coding switches are connected one by one through the data lines with the quick plug-in units, and binary address code action signals of the digital coding switches can be input into the PLC system through the data lines, so that the PLC system can identify various position action states of the continuous casting ladle manipulator. The mode changes the original messy, complicated and complicated line of the continuous casting ladle manipulator into the regular, standard and simple and integrated line, reduces the workload of on-site line debugging and inspection personnel, and changes the future line wiring method.
Claims (6)
1. The PLC control circuit for the continuous casting ladle manipulator is characterized by comprising a plurality of limit switches, wherein one end of each limit switch is connected with the enabling end of the corresponding digital coding switch, the other end of each limit switch is connected with the input end of the corresponding digital coding switch, and a plurality of output ends of the digital coding switches are connected with data receiving channels of a PLC system in a one-to-one correspondence mode through data lines.
2. The PLC control circuit for a continuous casting ladle robot according to claim 1, wherein one diode is connected to each output terminal of the digital code switch.
3. The PLC control circuit for the continuous casting ladle manipulator as claimed in claim 1, wherein each output end of the digital coding switch is connected with a current limiting resistor.
4. The PLC control circuit for a continuous casting ladle robot according to claim 1, wherein the digital code switch is a 7-bit binary digital code switch.
5. The PLC control circuit for a continuous casting ladle robot according to claim 1, wherein the data line is a data line with a quick-connect plug-in.
6. A PLC control method for a continuous casting ladle robot, characterized in that the PLC control circuit according to any one of claims 1 to 5 is used, comprising a setup phase and a use phase:
the setup phase comprises the steps of:
determining the number of receiving channels of a PLC system communicated with the digital coding switch according to the distribution condition of the continuous casting ladle manipulator;
determining the digit of the digital coding switch according to the action loop of the continuous casting ladle manipulator, setting an address code for each digital coding switch, and ensuring that each address code corresponds to one action of one limit switch;
the use phase comprises the following steps:
the PLC system reads the data received by the receiving channel;
and comparing the data with the address code, and determining the position of the limit switch according to the comparison result so as to obtain the action condition of the continuous casting ladle manipulator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153768.9A CN113759821A (en) | 2021-09-29 | 2021-09-29 | PLC control circuit for continuous casting ladle manipulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153768.9A CN113759821A (en) | 2021-09-29 | 2021-09-29 | PLC control circuit for continuous casting ladle manipulator |
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| CN113759821A true CN113759821A (en) | 2021-12-07 |
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| CN202111153768.9A Pending CN113759821A (en) | 2021-09-29 | 2021-09-29 | PLC control circuit for continuous casting ladle manipulator |
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Citations (6)
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| US6177899B1 (en) * | 1998-07-29 | 2001-01-23 | Etrend Electronics, Inc. | Analog-to-digital converter having multiple reference voltage comparators and boundary voltage error correction |
| CN101561513A (en) * | 2009-06-02 | 2009-10-21 | 吉林大学 | Device and method for observing three-dimensional DC electrical-method simulation experiment |
| CN202189255U (en) * | 2011-07-05 | 2012-04-11 | 湖南深拓智能设备有限公司 | Input type relay module |
| CN203630621U (en) * | 2013-07-01 | 2014-06-04 | 株洲科瑞变流电气有限公司 | Rectification trolley position monitoring system |
| CN204086924U (en) * | 2014-10-13 | 2015-01-07 | 成都瑞联电气股份有限公司 | The programmable relay module of a kind of control channel |
| CN106760821A (en) * | 2017-01-02 | 2017-05-31 | 上海爱登堡电梯集团股份有限公司 | Vertical circulation Mechanical parking system vehicle-carrying plate addressing detection identifying device |
-
2021
- 2021-09-29 CN CN202111153768.9A patent/CN113759821A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6177899B1 (en) * | 1998-07-29 | 2001-01-23 | Etrend Electronics, Inc. | Analog-to-digital converter having multiple reference voltage comparators and boundary voltage error correction |
| CN101561513A (en) * | 2009-06-02 | 2009-10-21 | 吉林大学 | Device and method for observing three-dimensional DC electrical-method simulation experiment |
| CN202189255U (en) * | 2011-07-05 | 2012-04-11 | 湖南深拓智能设备有限公司 | Input type relay module |
| CN203630621U (en) * | 2013-07-01 | 2014-06-04 | 株洲科瑞变流电气有限公司 | Rectification trolley position monitoring system |
| CN204086924U (en) * | 2014-10-13 | 2015-01-07 | 成都瑞联电气股份有限公司 | The programmable relay module of a kind of control channel |
| CN106760821A (en) * | 2017-01-02 | 2017-05-31 | 上海爱登堡电梯集团股份有限公司 | Vertical circulation Mechanical parking system vehicle-carrying plate addressing detection identifying device |
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Application publication date: 20211207 |
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