CN204404556U - A kind of Novel hot-air furnace control system based on MODBUS TCP/IP communication mode - Google Patents
A kind of Novel hot-air furnace control system based on MODBUS TCP/IP communication mode Download PDFInfo
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- CN204404556U CN204404556U CN201420835058.3U CN201420835058U CN204404556U CN 204404556 U CN204404556 U CN 204404556U CN 201420835058 U CN201420835058 U CN 201420835058U CN 204404556 U CN204404556 U CN 204404556U
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Abstract
The utility model relates to the technical field completing a set of process equipment control procedure for dissimilar control system, especially a kind of Novel hot-air furnace control system based on MODBUS TCP/IP communication mode.Its feature adopts industrial Ethernet technology, the novel communication control model of MODBUS ICP/IP protocol, solves the integration of control program between different model PLC control system, and to achieve between hot-blast stove accessible changes stove; In combustion fan VFC program, devise corresponding anti-asthma program, solve and breathe heavily shake problem at blower fan point when changing furnace operating, eliminate under guarantee blast, air quantity stable case and breathe heavily shake phenomenon.The utility model framework is reasonable, the transmission of process equipment control signal is accurate, structure improvement, can realize stable automatic combustion and certainly move stove controlling.
Description
Technical field
The utility model relates to the technical field jointly completing a set of process equipment control procedure for dissimilar control system, especially a kind of Novel hot-air furnace control system based on MODBUS TCP/IP communication mode.
Background technology
MODBUS agreement is a kind of all-purpose language be applied on electronic controller, and its opening makes it progressively become a kind of communication protocol standard of automatic control.Traditional MODBUS agreement operates on the serial link of RS-232C or RS-485 compatibility mostly, and the deficiency of its reliability, efficiency of transmission and flexibility limits range of application.Along with the development of industrial Ethernet technology, Industry Control controls from unit the centralized Control, the distribute control that move towards TCP/IP network.Had it, the control appliance that different vendor produces can be linked to be industrial network, carries out Centralized Monitoring.MODBUS frame embeds in TCP frame in the very simple mode of one by MODBUS ICP/IP protocol, it is a kind of connection-oriented mode, principal and subordinate's mechanism of its calling, acknowledgement mechanism and MODBUS cooperatively interacts, and makes switching Ethernet have very high certainty.
When designing common process control system, usually a technique unit is designed to namely a complete control system is realized a technique unit equipment whole technology controlling and process by a PLC, the seamless link of the control information data between a technique unit equipment ensure that the normal communication work between process equipment.Dissimilar PLC system is completed to the control of a technique unit, the process of network structure design, equipment control accuracy, communication mechanism is proposed higher requirement.
Certain iron-smelter 8# blast furnace is former has 3 matched with hot wind furnaces, 2# hot-blast stove furnace wall occurs that knockdown ftractures, need to carry out large repairs in time, if but stop 2# hot-blast stove, 1# and 3# hot-blast stove cannot ensure the needs of blast furnace air, in order to deal with problems, iron-smelter technologist determines to increase a 4# hot-blast stove for 8# blast furnace.The former automation control system hardware of 8# blast furnace is Mo Dikang Quantum series of PLC, supporting programming software Concept6.0, upper software MP72, be obsolete product because of former Upper system software and new point cannot be added, MP72 no longer upgrades upgrading, causes the control appliance that cannot increase 4# hot-blast stove in original control system newly.Therefore, the control system platform of the different Upper system of two covers and complete the control of same process equipment system, makes the framework of control system and design become crucial.In addition, hot-blast stove combustion fan was voltage across-the-line starting originally, and what the mode that voltage directly starts easily caused blower fan breathes heavily shake, caused that hot-blast stove combustion fan damages, airflow pressure controls uneven and that energy consumption is high phenomenon.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of Novel hot-air furnace control system based on MODBUS TCP/IP communication mode, adopt the novel communication control model of EPA, MODBUS ICP/IP protocol, solve the integration of control program between different model PLC control system, complete burning stove, change the process control procedure such as stove, stewing stove, achieve the seamless link of production technology.
In order to solve the problems of the technologies described above, the technical solution of the utility model is achieved in that
Based on a Novel hot-air furnace control system for MODBUS TCP/IP communication mode, comprise former stove operation station, new stove operation station, original system switch, new system switch, former 1 to No. 3 hot-blast stove PLC control system, new No. 4 hot-blast stove PLC control system and master control display system; Described former stove operation station, new stove operation station, former 1 to No. 3 hot-blast stove PLC control system, new No. 4 hot-blast stove PLC control system, master control display system comprise the CPU of NOE mixed-media network modules mixed-media and network enabled scan function respectively; Former stove operation station is connected with former 1 to No. 3 hot-blast stove PLC control system by original system switch; New stove operation station is connected with new No. 4 hot-blast stove PLC control system by new system switch; Master control display system is connected with new system switch by original system switch.
Further, the described new control system based on MODBUS TCP/IP communication mode also comprises the frequency-changing control system of fan that the described Novel hot-air furnace control system based on MODBUS TCP/IP communication mode also comprises combustion fan air door, frequency-changing control system of fan comprises frequency converter and relevant switching controls, system adopts rigid line to control, namely the 4-20mA current signal exported by hot-blast stove PLC controls, automatically blower fan frequency is regulated according to the current signal that CPU exports, and by blower fan frequency feedback to PLC input port, by the in good time switching of throttle opening and VFC electric current with coordinate, control the unlatching of air door, ensure that blast is led off in time when breathing heavily shake point and running, eliminate blower fan and breathe heavily shake.
Further, described NOE mixed-media network modules mixed-media and the CPU of network enabled scan function need to carry out communication setting, I/O scanning is set in new No. 4 hot-blast stove PLC control system, reading and writing address must configure respectively, data type must be REAL, data address and reading, the length write must configure correct, by configuring I/O scanning in NOE mixed-media network modules mixed-media, realize new No. 4 hot-blast stove PLC control system and gather reading/writing data by Ethernet from/to former 1 to No. 3 hot-blast stove PLC control system, then can at former stove operation station, new stove operation station and other master control display system realize arbitrarily the complete seamless shining furnace operating of hot-blast stove.
The utility model beneficial effect compared to existing technology:
The utility model framework is reasonable, the transmission of process equipment control signal is accurate, structure improvement, can realize stable automatic combustion and certainly move stove controlling.Concrete beneficial effect:
1, the utility model control structure is reasonable, when original system does not stop production, can complete the operation of new system, simultaneously between two different control systems, ensures the accurate interactive controlling of signal changing stove.
2, the utility model can realize the combination of combustion fan air door and frequency conversion, namely can reach the object using frequency conversion control energy-saving consumption reduction, also can solve the phenomenon of only breathing heavily shake with the blower fan that VFC occurs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, based on a Novel hot-air furnace control system for MODBUS TCP/IP communication mode, comprise former stove operation station, new stove operation station, original system switch, new system switch, former 1 to No. 3 hot-blast stove PLC control system, new No. 4 hot-blast stove PLC control system and master control display system;
Described former stove operation station, new stove operation station, former 1 to No. 3 hot-blast stove PLC control system, new No. 4 hot-blast stove PLC control system, master control display system comprise the CPU of NOE mixed-media network modules mixed-media and network enabled scan function respectively; Former stove operation station is connected with former 1 to No. 3 hot-blast stove PLC control system by original system switch; New stove operation station is connected with new No. 4 hot-blast stove PLC control system by new system switch; Master control display system is connected with new system switch by original system switch.
On the basis of technical scheme described in above-mentioned example, shown in composition graphs 1, preferably, the described Novel hot-air furnace control system based on MODBUS TCP/IP communication mode also comprises the frequency-changing control system of fan of combustion fan air door, frequency-changing control system of fan comprises frequency converter and relevant switching controls, system adopts rigid line to control, namely the 4-20mA current signal exported by hot-blast stove PLC controls, automatically blower fan frequency is regulated according to the current signal that CPU exports, and by blower fan frequency feedback to PLC input port, by the in good time switching of throttle opening and VFC electric current with coordinate, control the unlatching of air door.
While design hot-blast stove combustion fan control program, devise corresponding anti-asthma program, by the in good time switching of air door and frequency conversion with coordinate, namely carry out a suitable unlatching to air door to control, to ensure that blast is led off in time, put in place along with frequency converter frequency regulates, air door restores to the original state gradually again, this addresses the problem and breathe heavily shake problem at blower fan point when changing furnace operating, eliminate under guarantee blast, air quantity stable case and breathe heavily shake phenomenon.
Preferably, described NOE mixed-media network modules mixed-media and the CPU of network enabled scan function need to carry out communication setting, and in new No. 4 hot-blast stove PLC control system, arrange I/O scanning, reading and writing address must configure respectively, data type must be REAL, and the length of data address and reading and writing must configure correct; By configuring I/O scanning in NOE mixed-media network modules mixed-media, realize new No. 4 hot-blast stove PLC control system and gather reading/writing data through Ethernet from/to former 1 to No. 3 hot-blast stove PLC control system, at former stove operation station, newly, stove operation station and other master control display system realize arbitrarily the complete seamless shining furnace operating of hot-blast stove.
Read and write by I/O scanning, and by design relevant change furnace operating program, to achieve between all the people present's hot-blast stove accessible changes stove, modularized design programs, debug communications network control signal voluntarily, complete the exploitation of program and picture, system running speed is fast, the whole autonomous Design of project is integrated, solves production practical problem.
Now in conjunction with above-mentioned situation, the utility model is described in further detail:
For realizing changing furnace operating arbitrarily, look for novelty, MODBUS TCP/IP communication must be carried out between old system.Adopt the communication modes based on Modbus TCP/IP, because soft and hardware employs the latest equipment with the same brand of former control system, ensure that new 4# hot-blast stove can incorporate in original control system better, make control more perfect, more reliable.
(1) new, old system communication controls interactive signal specific implementation method
1, new hot blast stove system is connected physical network with original control system, the network architecture as shown in Figure 1.
2, arbitrarily changing furnace operating for realizing, look for novelty, MODBUS TCP/IP communication must be carried out between legacy system.Signal wiring well and after setting completed, carry out writing of required reading and writing program, arranges communication variables, realizes network communication function.From old PLC, new PLC is read to all needs and needs the variable being written to old PLC from new PLC to add up.Table 1 reads analog quantity for new PLC from former PLC, and table 2 is the digital quantity that new PLC reads from former PLC and writes.
The new PLC of table 1 reads analog quantity from former PLC
| Signal instruction | Former PLC address | Former PLC word address | New PLC address |
| Coal gas adjusting air-fuel ratio value sets | 401013 | 401314 | %MW324 |
| Cold wind main pipe pressure | 400115 | 401316 | %MW326 |
| For the setting of thermal conditioning calorific value of gas | 401015 | 401318 | %MW328 |
| Manifold pressure after air heat exchanger | 400127 | 401322 | %MW332 |
| 1# combustion air motor stator temperature 1 | 400275 | 401336 | %MW346 |
| 1# combustion air motor stator temperature 2 | 400277 | 401338 | %MW348 |
| 1# combustion air motor stator temperature 3 | 400279 | 401340 | %MW350 |
| 1# combustion air non-shaft stretching end axle temperature | 400281 | 401342 | %MW352 |
| 1# combustion air axle stretch end axle temperature | 400283 | 401344 | %MW354 |
| 1# combustion air bearing temperature 1 | 400285 | 401346 | %MW356 |
| 1# combustion air bearing temperature 2 | 400287 | 401348 | %MW358 |
The digital quantity that the new PLC of table 2 reads from former PLC and writes
| Signal instruction | Former PLC address | Former PLC word address | New PLC address | New PLC word address |
| 1 stove air-supply | 002006 | 401300 | %M620 | TCP_1:%MW310 |
| 2 stove air-supplies | 002007 | %M621 | ||
| 3 stove air-supplies | 002008 | %M622 | ||
| 1 stove cold stoking | 002009 | %M634 | ||
| 2 stove cold stokings | 002010 | %M635 | ||
| 3 stove cold stokings | 002011 | %M636 | ||
| Temperature principle is from moving stove | 002015 | %M623 | ||
| Time principle is from moving stove | 002016 | %M624 | ||
| The air-supply of temperature principle 1 stove terminates | 002053 | %M625 | ||
| The air-supply of temperature principle 2 stove terminates | 002054 | %M626 | ||
| The air-supply of temperature principle 3 stove terminates | 002055 | %M627 | ||
| The air-supply of time principle 1 stove terminates | 002056 | %M629 | ||
| The air-supply of time principle 2 stove terminates | 002057 | %M630 | ||
| The air-supply of time principle 3 stove terminates | 002058 | %M631 |
3, after communication data table arranges, then can carry out the programming procedure of concrete communication step by step, first analog quantity and digital quantity classification be carried out Programming.To the data read be needed to arrange in the program of former PLC, analog quantity is write direct address to be read, digital quantity writes address to be read after being packaged into word form, new PLC is scanned by IO, corresponding information is read from continued in address in the appointment of former PLC, can apply in a program after analog quantity directly reads, digital quantity then needs the word form read to decompose, then measures decomposing each bit of gained the correlated variables giving new PLC respectively.The communication Design of former PLC and new PLC system mainly contains three class signals: show class switching value, show the communication of analoglike amount and screen operation class variable.For display class switching value, in former PLC control program, digital quantity packing conversion program mainly have employed bit_to_word functional block, left tubing feet writes switch waiting for transmission respectively and calls the roll, 16 can be write at most, on the contrary, in new PLC, corresponding packing to be write equally, unpacks, loading program, and its adopt functional block be word_to_bit, right side pin be Received signal strength switch call the roll.When writing digital quantity from new PLC to old PLC, in control program due to new PLC, for the sake of security, be operate in the mode of pulse signal, therefore make in old PLC and special unpack program, new PLC writes in a pulsed fashion, decomposing rear pulse is relevant variable transmission ' 1 ', then with impulse form transmission ' 0 ', resets after being equivalent to first set, MOVE block controls with EN end, does not come into force without MOVE during operation.New PLC controls not affect old PLC and operates this valve open and close action, and two cover PLC can operate these equipment.In the PLC program of new hot-blast stove, arrange " I/O scanning ", reading and writing address must configure respectively, and data type is necessary for REAL, and the length of data address and reading and writing must configure correctly.When changing furnace operating, system automatically will read and identifies the state of three old hot-blast stoves, and carries out automatic decision according to these states, if operation requests does not meet technique interlock requirement, then will not respond.
(2) anti-asthma controls specific implementation method
4, combustion fan frequency converter used, adopt rigid line to control, 4 ~ 20 milliamperes of current signals namely exported by PLC control, and automatically adjust frequency, the output frequency of self is fed back to the input point of PLC simultaneously according to the signal that PLC provides.First the I/O point of input and output is arranged out.
5, while hot-blast stove carries out changing furnace operating, by the in good time switching of air door and frequency conversion with coordinate, namely according to the test of breathing heavily shake curve of blower fan, determine to breathe heavily shake point, whenever fan operation so far puts place, carry out a suitable unlatching to air door to control, to ensure that blast is led off in time, put in place along with frequency converter frequency regulates, air door restores to the original state gradually again, like this, can eliminate when ensureing that blast, air quantity are stable the phenomenon that shake breathed heavily by blower fan.
To achieve under different system between all the people present's hot-blast stove accessible changes furnace operating in certain steel mill 8# blast furnace newly-built 4# Control System of Airheater design based on MODBUS TCP/IP, possessed the anti-asthma shake control design case of combustion fan simultaneously, the multinomial features such as software configuration is distinct, transplantability is better, have propagation and employment widely and are worth.
By reference to the accompanying drawings the utility model is exemplarily described above; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out; or design of the present utility model and technical scheme directly applied to other occasion, all within protection domain of the present utility model without to improve.
Claims (3)
1. based on a Novel hot-air furnace control system for MODBUS TCP/IP communication mode, it is characterized in that: comprise former stove operation station, new stove operation station, original system switch, new system switch, former hot-blast stove PLC control system, new hot-blast stove PLC control system and master control display system; Described former stove operation station, new stove operation station, former hot-blast stove PLC control system, new hot-blast stove PLC control system, master control display system comprise the CPU of NOE mixed-media network modules mixed-media and network enabled scan function respectively; Former stove operation station is connected with former hot-blast stove PLC control system by original system switch; New stove operation station is connected with new hot-blast stove PLC control system by new system switch; Master control display system is connected with new system switch by original system switch.
2. a kind of Novel hot-air furnace control system based on MODBUS TCP/IP communication mode according to claim 1, it is characterized in that: the described Novel hot-air furnace control system based on MODBUS TCP/IP communication mode also comprises the frequency-changing control system of fan of combustion fan air door, frequency-changing control system of fan comprises frequency converter and relevant switching controls, system adopts rigid line to control, namely the 4-20mA current signal exported by hot-blast stove PLC controls, automatically blower fan frequency is regulated according to the current signal that CPU exports, and by blower fan frequency feedback to PLC input port, by the in good time switching of throttle opening and VFC electric current with coordinate, control the unlatching of air door, ensure that blast is led off in time when breathing heavily shake point and running, eliminate blower fan and breathe heavily shake.
3. a kind of Novel hot-air furnace control system based on MODBUS TCP/IP communication mode according to claim 1, it is characterized in that: described NOE mixed-media network modules mixed-media and the CPU of network enabled scan function need to carry out communication setting, I/O scanning is set in new hot-blast stove PLC control system, reading and writing address must configure respectively, data type must be REAL, data address and reading, the length write must configure correct, by configuring I/O scanning in NOE mixed-media network modules mixed-media, realize new hot-blast stove PLC control system and gather reading/writing data by Ethernet from/to former hot-blast stove PLC control system, then can at former stove operation station, new stove operation station and other master control display system realize arbitrarily the complete seamless shining furnace operating of hot-blast stove.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884975A (en) * | 2019-03-04 | 2019-06-14 | 武汉精立电子技术有限公司 | A kind of method and device that simulation PLC is communicated with AOI |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884975A (en) * | 2019-03-04 | 2019-06-14 | 武汉精立电子技术有限公司 | A kind of method and device that simulation PLC is communicated with AOI |
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