CN203164640U - Profibus/Modbus protocol conversion module and intelligent circuit breaker - Google Patents
Profibus/Modbus protocol conversion module and intelligent circuit breaker Download PDFInfo
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- CN203164640U CN203164640U CN 201220746061 CN201220746061U CN203164640U CN 203164640 U CN203164640 U CN 203164640U CN 201220746061 CN201220746061 CN 201220746061 CN 201220746061 U CN201220746061 U CN 201220746061U CN 203164640 U CN203164640 U CN 203164640U
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Abstract
The utility model discloses a Profibus/Modbus protocol conversion module and an intelligent circuit breaker. The protocol conversion module comprises an MCU central processing unit, and an SRAM storage unit, a dial switch, an Modbus communication interface, an indicating unit and a PROFIUBS interface chip which are connected with the MCU central processing unit, as well as an isolation-type RS485 transceiver chip and a Profibus communication interface which are sequentially connected with the PROFIUBS interface chip. The circuit breaker comprises a molded case circuit breaker body, a remote action actuator and the above protocol conversion module. The Profibus/Modbus protocol conversion module and the intelligent circuit breaker of the utility model enable users to monitor and control Modbus equipment real time through a Profibus.
Description
Technical field
The utility model belongs to the intelligent breaker technical field, is specifically related to protocol conversion module and the intelligent breaker of a kind of Profibus and Modbus.
Background technology
PROFIBUS was the abbreviation of Process FieldbusROFIBUS, formally became the international standard of fieldbus in 1989.Present dominate in the field of multiple robotization, it is made up of three compatible parts, i.e. PROFIBUS-DP (Decentralized Periphery), PROFIBUS-PA (Process Automation), PROFIBUS-FMS (Fieldbus Message Specification).Wherein PROFIBUS-DP is applied to field level, and it is the low-cost communication of a kind of high speed, is used for the communication between device level control system and the distributing I/O; PROFIBUS-PA is applicable to process automation, and sensor and actuator are connected on the shared bus, can be applicable to the intrinsic safety field; PROFIBUS-FMS is used for the workshop level monitor network, and it is real-time many master networks of token structure, is used for finishing communication between controller and the smart devices and the message exchange between the controller.The main MS master-slave mode of using is periodically carried out exchanges data with gearing usually.
Than Profibus, many limitation that Modbus bus itself exists, be mainly reflected in that efficient is low, the real-time of system is poor, reliability communication is low, later maintenance cost is high, the network engineering debugging is complicated, transmission range node undesirable, that unibus can articulate is few, use dumb etc.
But in the application of industrial field bus, the RS485 that the Modbus agreement is used slightly has superiority on hardware cost and development difficulty, still is widely used at home, is unpractical so abandon the Modbus bus fully in present stage.Thereby press for a kind of Modbus agreement in actual applications to the transitional product of Profibus protocol conversion.
The utility model content
The purpose of this utility model provides the protocol conversion module that a kind of user of making can monitor in real time and control Modbus equipment by the Profibus bus.
Another purpose of the present utility model provides and makes the user can be by the Profibus bus to its intelligent breaker of monitoring in real time and controlling.
The technical scheme that realizes first purpose of the utility model is: the protocol conversion module of a kind of Profibus and Modbus, comprise the MCU CPU (central processing unit), the SRAM storage unit that links to each other with the MCU CPU (central processing unit), toggle switch, Modbus communication interface, indicating member and PROFIUBS interface chip, and the isolated form RS485 transceiving chip that links to each other with the PROFIUBS interface chip successively and Profibus communication interface.
In the such scheme, described PROFIUBS interface chip is the PROFIUBS-DP interface chip.
In the such scheme, comprise also that two-way is isolated+the 5V direct supply, wherein one the road supply with MCU CPU (central processing unit) and isolated form RS485 transceiving chip, Profibus bus transceiver module is supplied with on another road.
In the such scheme, shown in indicating member comprise LCDs and the debugging button.
The technical scheme that realizes second purpose of the utility model is: the intelligent breaker of the protocol conversion module of a kind of Profibus of having and Modbus comprises the protocol conversion module of breaker of plastic casing body, long-range action actuating mechanism and Profibus and Modbus; The breaker of plastic casing body comprises base and loam cake; The protocol conversion module of described Profibus and Modbus comprises the MCU CPU (central processing unit), the SRAM storage unit that links to each other with the MCU CPU (central processing unit), toggle switch, Modbus communication interface, indicating member and PROFIUBS interface chip, and the isolated form RS485 transceiving chip that links to each other with the PROFIUBS interface chip successively and Profibus communication interface.
In the such scheme, described PROFIUBS interface chip is the PROFIUBS-DP interface chip.
In the such scheme, comprise also that two-way is isolated+the 5V direct supply, wherein one the road supply with MCU CPU (central processing unit) and isolated form RS485 transceiving chip, Profibus bus transceiver module is supplied with on another road.
In the such scheme, shown in indicating member comprise LCDs and the debugging button; The loam cake of described breaker of plastic casing body comprises panel and sidewall, and this panel and sidewall are provided with a breach, and the protocol conversion module of described Profibus and Modbus is arranged in this breach.
In the such scheme, the side that the protocol conversion module of described Profibus and Modbus is positioned at the loam cake inboard is provided with the Modbus communication interface, another side of the protocol conversion module of described Profibus and Modbus exposes loam cake, and this side is provided with the Profibus communication interface.
The structure of protocol conversion module is comparatively rationally simplified in the utility model, and it is less to take up room, and performance is comparatively reliable and stable.Intelligent breaker in the utility model is owing to be provided with the protocol conversion module of Profibus and Modbus, make the user to monitor in real time and to control it by the Profibus bus, its scope of application can either be expanded, hardware cost and development difficulty can also be effectively reduced.
Description of drawings
Fig. 1 is a kind of circuit structure block diagram of protocol conversion module in the utility model;
Fig. 2 is a kind of circuit theory diagrams of protocol conversion module shown in Figure 1;
Fig. 3 is the another kind of circuit theory diagrams of protocol conversion module shown in Figure 1;
Fig. 4 is the main program flow chart of protocol conversion module shown in Figure 1;
Fig. 5 is the initialize routine process flow diagram of protocol conversion module shown in Figure 1;
Fig. 6 is the input data interrupt service routine process flow diagram of protocol translation module shown in Figure 1;
Fig. 7 is the SPC3 interrupt service routine process flow diagram of protocol translation module shown in Figure 1;
Fig. 8 is a kind of perspective view of first kind of structure of intelligent breaker in the utility model;
Fig. 9 is a kind of perspective view of protocol translation module in the intelligent breaker shown in Figure 8;
A kind of perspective view of Figure 10 when to be protocol translation module shown in Figure 9 from another angle observe;
Figure 11 is a kind of perspective view of second kind of structure of intelligent breaker in the utility model;
Figure 12 is a kind of perspective view of protocol translation module in the intelligent breaker shown in Figure 11;
A kind of perspective view of Figure 13 when to be protocol translation module shown in Figure 12 from another angle observe.
Embodiment
(embodiment 1, protocol conversion module)
Fig. 1 to Fig. 7 has shown a kind of embodiment of protocol conversion module in the utility model, wherein Fig. 1 is a kind of circuit structure block diagram of protocol conversion module in the utility model, Fig. 2 is a kind of circuit theory diagrams of protocol conversion module shown in Figure 1, and Fig. 3 is the another kind of circuit theory diagrams of protocol conversion module shown in Figure 1; Fig. 4 is the main program flow chart of protocol conversion module shown in Figure 1; Fig. 5 is the initialize routine process flow diagram of protocol conversion module shown in Figure 1; Fig. 6 is the input data interrupt service routine process flow diagram of protocol translation module shown in Figure 1; Fig. 7 is the SPC3 interrupt service routine process flow diagram of protocol translation module shown in Figure 1.
Present embodiment is the protocol conversion module of a kind of Profibus and Modbus, comprise the MCU CPU (central processing unit), the SRAM storage unit that links to each other with the MCU CPU (central processing unit), toggle switch, Modbus communication interface, indicating member, PROFIUBS interface chip, the isolated form RS485 transceiving chip that links to each other with the PROFIUBS interface chip and Profibus communication interface and two-way are isolated+the 5V direct supply successively, wherein one the road supply with MCU CPU (central processing unit) and isolated form RS485 transceiving chip, Profibus bus transceiver module is supplied with on another road.Traditionally, the general 24V power supply of fieldbus that adopts was powered during modular converter was used at the scene, and this power supply is unstable power supply, and has many interference, so present embodiment does not directly insert modular converter with it, but insert again through voltage stabilizing and after isolating.
In the present embodiment, the MCU microprocessor in the MCU CPU (central processing unit) adopts the W77 family chip with ISP function.The W77E516 chip functions is powerful, 64KB, the Flash EPROM district with ISP function, the auxiliary Flash EPROM district of 4KB, 3 16 bit timings/counters, programmable watchdog timer.The ISP function of W77E516, the circuit board that makes things convenient for developer's butt welding to connect carries out debugged program.
Because the communication protocol more complicated of PROFIBUS, in order to reduce development difficulty, present embodiment uses special-purpose communication process chip SPC3, the agreement of complexity is bypassed fully, the method for designing that traditional MCU adds pure software is compared in this design, make design simplification greatly, also make simultaneously the realization of PROFIBUS agreement simple more, make things convenient for, save time, laborsaving, increased the reliability of system.Complete PROFIBUS DP agreement that SPC3 is integrated is supported Intel80C31,80X86 simultaneously, Siemens80c166/165/167, Motorola HC11-, HC16-, the microprocessor of types such as HC916, the RS485 transmission technology, the 1.5K dual port RAM that it is inner integrated, when carrying out the DP communication, the whole DP-SAP of its meeting automatic setting, SPC3 has public interruption output, whenever all can scan mac state at status register; WatchDog Timer runs on 3 different conditions: baud rate search, baud rate control and DP control; SPC3 identifies baud rate automatically, from 9.6K to peak transfer rate 12Mbit/s; Little order (MS) control overall process
[56-59]Under UART control, parallel data stream is converted to serial data stream, or opposite.Idle (idle) timer is directly controlled the bus stand-by period on universal serial bus.Select this chip not only to make simplicity of designization, shared the extensive work of MCU, greatly reduce development difficulty simultaneously, save the development time, guaranteed the stability of system.
Because the transfer rate of Profibus end is bigger far above speed and the data quantity transmitted of Modbus end in industry spot, therefore need RAM of expansion to make the SRAM storage unit.
Because the Profibus bus packet contains good verification scheme, so adapter removes the CRC check field after initiatively the Modbus upstream data being done CRC check, remaining data are changed to the Profibus bus.In like manner, from the downlink data that the Profibus bus interface is received, SPC3 can be to removing check field behind the Profibus data hardware check, for make the descending Modbus data changed out can with the slave computer proper communication, we carry out adding check field after the CRC check to data, to meet the requirement of Modbus consensus standard frame.
In order to make the visual communication of seeing data of user, design two pilot lamp as the indicating member of present embodiment, the downlink data communication of indication from Profibus to Modbus; The uplink communication of another indication from Modbus to Profibus.
Concrete scheme to present embodiment is further explained explanation below.
See Fig. 2 and shown in Figure 3, present embodiment comprises MCU, photoelectricity isolation, toggle switch and DC DC module etc.
That RS485 bus driver chip is selected for use is 6LB184, and this chip has the transient current inhibit feature.6LB184 is in semiduplex mode, inside comprises a transmitter and a receiver, need be by enabling to bring in control " receipts " and " sending out " when work, RE links to each other with DE with its Enable Pin, and then receive on the P4.3 pin of magnificent nation single-chip microcomputer, in software by to the set of P4.3 with reset to control 6LB184 and carry out the receipts of data and send out.
Profibus bus driver module adopts the isolated form RS485 transceiving chip AMD2486 of the magnetic isolation technology of ADI company, its inner integrated three-channel digital isolator, the differential driver of the ternary output of band and RS485 differential receiver of a ternary input of band, it has current limliting and overheated turn-off characteristic simultaneously, and prevent the excessive situation of power consumption that causes owing to bus conflict, integrated hot breaking circuit can be set to high-impedance state with driver output, prevents excessive power attenuation.Need not any discrete component and just can realize the RS485 communication function
[60,61]The pin TxD of AMD2486, RxD and RTS receive the TxD of SPC3 respectively, on RxD and the RTS pin.
Also comprised in the hardware design DC the design of DC power unit, the general power supply 24V of fieldbus that adopts powered during converter was used at the scene, and this power supply is unstable power supply, and has many interference, so can not directly insert converter, must be through voltage stabilizing and isolation.In converter, need 2 the tunnel isolate+direct supply of 5V, be respectively the VCC1 of the required first via+5V of MCU and RS485 transceiver module, the VCC2 of the second tunnel+5V that Profibus bus transceiver module is required.Thereby consider to select for use the power module of 1 24V commentaries on classics two-way isolation+5V and the DC power supplier of an independent output+5V
[62]Therefore, this converter has been selected the WRD240505S-1W of Jin Shengyang company and the power module of IB0505LD-W75 for use, inserts the filter regulator circuit of the tantalum electric capacity that contains representative value at VCC1 and VCC2 two ends.
In order to reduce development difficulty, the design has selected the SPC3 chip of Siemens Company, complete Profibus-dp agreement that this chip is integrated, it is exactly an external RAM of MCU expansion for MCU, and, SPC3 has the home address decoding circuit, so, AB8-AB10 ground connection.This moment, DB7-DB0 was that the data address multiplex bus links to each other with the P0.0-P0.7 of MCU, can produce data and the address of least-significant byte, high 4 bit address are produced by AB0-AB3, AB4-AB7 produces the chip selection signal of SPC3, have only AB4-AB7 just to choose SPC3 (AB0-AB7 links to each other with the P2.0-P2.7 of MCU, wherein links to each other with AB4 after the P2.4 negate) at 0 o'clock.
Because the transfer rate of Profibus end is bigger far above speed and the data quantity transmitted of Modbus end in industry spot, therefore need RAM of expansion.The design selects the IS65C256AL of ISSI for use, and it is 32K, 8 static RAM (SRAM)s, also needs a displacement latch simultaneously.For convenience the user carries out the address to converter and arranges, and needs a toggle switch, and in requisition for a shift register, the shift register that the design selects is MC74HC165A.
Because complete DP agreement that SPC3 is integrated is so with master station communication the time, W77E516 need not participate in handling the DP state machine.It mainly is responsible for storage and handles the data that main website sends here, and organizes slave station to be sent to the data of main website
[63-67]SPC3 comes down to the operating office between main website and slave station, namely is exactly the packet that main website sends to be untied send to slave station, and the data packing that slave station is sent here is sent to main website.(wherein import, export relative PROFIBUS main website).
The software design of system mainly comprises: the master routine design of W77E516 single-chip microcomputer, the Initializing Designing Program of SPC3, input data interrupt service routine, SPC3 interrupt service routine.
Data output processing and the input of user's diagnostic data can be placed in the circulation of primary application program.And SPC3 can produce the output identification position when receiving the difference output data that transmitted by the PROFIBUS main website, and CPU receives the main website data by poll zone bit in application cycle.For the diagnostic message of application-specific, need be delivered to main website in real time
[61-64]Primary application program judges whether that in application cycle available diagnosis BUF exists, the input of application program when idle BUF an is arranged diagnostic message, and request is upgraded.Main program flow chart as shown in Figure 4.
Wherein, when the data of main website output are converted to the modbus protocol data, mainly be to be that main website output data are added the CRC check field, start RS485 then and send and enable, namely set DE pin (single-chip microcomputer P4.3 pin) sends the data to consumer products.
The initialize routine of SPC3 should be placed on the front of application program major cycle, the SPC3 initialization comprises the interruption that SPC3 is set allows, writes slave station identifier and address, the SPC3 mode register is set, the diagnosis buffer zone is set, parameter buffer zone, configuration buffer zone, address buffer and initial length, and obtains the pointer of each buffer zone and the pointer of supplementary buffer according to above initial value
[65,66]Determine output buffer, input block and pointer according to the data length of transmission then.The initialize routine of SPC3 as shown in Figure 5.
Data inputs is handled and is placed in the input data interrupt service routine, utilizes the serial communication of single-chip microcomputer to interrupt, and the data that slave station is sent here are converted to the PROFIBUS agreement again and send to main website.In an application cycle, by the data that should be used for refreshing among the input BUF, guarantee that all input data are up-to-date more new datas
[67]Its program flow diagram as shown in Figure 6.
The variety of event that the SPC3 interrupt service routine then takes place for the treatment of SPC3: new parameter message event; Overall situation control command message event; Enter or withdraw from the exchanges data state event; New configuration message event; New address arranges the message event; Monitor baud rate event and house dog and overflow event
[68,69]Its program flow diagram as shown in Figure 7.
(embodiment 2, protocol conversion module)
Present embodiment is substantially the same manner as Example 1, and difference is: shown in indicating member also comprise LCDs and the debugging button.
(embodiment 3, intelligent breaker)
Fig. 8 to Figure 10 has shown a kind of embodiment of intelligent breaker in the utility model, wherein Fig. 8 is a kind of perspective view of first kind of structure of intelligent breaker in the utility model, and Fig. 9 is a kind of perspective view of protocol translation module in the intelligent breaker shown in Figure 8; A kind of perspective view of Figure 10 when to be protocol translation module shown in Figure 9 from another angle observe.
Present embodiment is a kind of intelligent plastic housing isolating switch that adopts above-described embodiment 2 to make, and sees Fig. 8 to Figure 10, comprises breaker of plastic casing body 1, long-range action actuating mechanism (be positioned within the loam cake, do not draw on the figure) and embodiment 1 described protocol conversion module 2; The breaker of plastic casing body comprises base 11 and loam cake 12.
LCDs in the present embodiment not only can be used for display working condition, can also carry out data to it by the debugging button and preset, adjusts and check, effectively widens its range of application.
The side that described protocol conversion module is positioned at the loam cake inboard is provided with Modbus communication interface 26, and another side of described protocol conversion module exposes the sidewall of loam cake, and equal with sidewall, and this side is provided with Profibus communication interface 27.
In the present embodiment, be fixed with a Modbus communication inserting terminal in the described loam cake, when inserting breach under the position-limiting action of described protocol conversion module at guide runner, its inboard Modbus communication interface is inserted in this Modbus communication inserting terminal.Also be provided with fastening screw 25 on the protocol conversion module in the present embodiment, each fastening screw is telescopic to be arranged on the protocol conversion module housing, in the described loam cake or sidewall be provided with the pilot hole that matches with each fastening screw, when each fastening screw indentation, insert in the corresponding pilot hole its bottom, thereby protocol conversion module is positioned in the breach.After pressing once each fastening screw again, fastening screw then ejects from pilot hole, thereby can dismantle this protocol conversion module.
(embodiment 4, intelligent breaker)
Figure 11 to Figure 13 has shown the another kind of embodiment of intelligent breaker in the utility model, wherein Figure 11 is a kind of perspective view of second kind of structure of intelligent breaker in the utility model, and Figure 12 is a kind of perspective view of protocol translation module in the intelligent breaker shown in Figure 11; A kind of perspective view of Figure 13 when to be protocol translation module shown in Figure 12 from another angle observe.
Present embodiment is substantially the same manner as Example 3, difference is: see Figure 11 to Figure 13, the outboard end that described agreement is changed the revolving die piece stretches out the loam cake sidewall, and each side that stretches out loam cake sidewall sections housing is equipped with Profibus communication interface 27, this be because, if as embodiment 3, external Profibus communication inserting terminal is inserted along the direction vertical with the loam cake sidewall, so adjacent electrical equipment must be abdicated the space for this reason; This structure of present embodiment can be so that external Profibus communication inserting terminal can take up room thereby reduce integral body along inserting Profibus communication interface 27 with the direction of loam cake parallel sidewalls.In addition, the fastening screw in the present embodiment 25 has also been adjusted the position thereupon.
Obviously, above-described embodiment of the present utility model only is for the utility model example clearly is described, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And these belong to apparent variation or the change that connotation of the present utility model extends out and still belong to protection domain of the present utility model.
Claims (9)
1. the protocol conversion module of a Profibus and Modbus, it is characterized in that: comprise the MCU CPU (central processing unit), the SRAM storage unit that links to each other with the MCU CPU (central processing unit), toggle switch, Modbus communication interface, indicating member and PROFIUBS interface chip, and the isolated form RS485 transceiving chip that links to each other with the PROFIUBS interface chip successively and Profibus communication interface.
2. the protocol conversion module of Profibus according to claim 1 and Modbus, it is characterized in that: described PROFIUBS interface chip is the PROFIUBS-DP interface chip.
3. the protocol conversion module of Profibus according to claim 1 and Modbus, it is characterized in that: comprise also that two-way is isolated+the 5V direct supply, wherein one the road supply with MCU CPU (central processing unit) and isolated form RS485 transceiving chip, Profibus bus transceiver module is supplied with on another road.
4. the protocol conversion module of Profibus according to claim 1 and Modbus is characterized in that: shown in indicating member comprise LCDs and debugging button.
5. the intelligent breaker with protocol conversion module of Profibus and Modbus is characterized in that: the protocol conversion module that comprises breaker of plastic casing body, long-range action actuating mechanism and Profibus and Modbus; The breaker of plastic casing body comprises base and loam cake; The protocol conversion module of described Profibus and Modbus comprises the MCU CPU (central processing unit), the SRAM storage unit that links to each other with the MCU CPU (central processing unit), toggle switch, Modbus communication interface, indicating member and PROFIUBS interface chip, and the isolated form RS485 transceiving chip that links to each other with the PROFIUBS interface chip successively and Profibus communication interface.
6. the intelligent breaker with protocol conversion module of Profibus and Modbus according to claim 5, it is characterized in that: described PROFIUBS interface chip is the PROFIUBS-DP interface chip.
7. the intelligent breaker with protocol conversion module of Profibus and Modbus according to claim 5, it is characterized in that: comprise also that two-way is isolated+the 5V direct supply, wherein one the road supply with MCU CPU (central processing unit) and isolated form RS485 transceiving chip, Profibus bus transceiver module is supplied with on another road.
8. the intelligent breaker with protocol conversion module of Profibus and Modbus according to claim 5 is characterized in that: shown in indicating member comprise LCDs and debugging button; The loam cake of described breaker of plastic casing body comprises panel and sidewall, and this panel and sidewall are provided with a breach, and the protocol conversion module of described Profibus and Modbus is arranged in this breach.
9. the intelligent breaker with protocol conversion module of Profibus and Modbus according to claim 8, it is characterized in that: the side that the protocol conversion module of described Profibus and Modbus is positioned at the loam cake inboard is provided with the Modbus communication interface, another side of the protocol conversion module of described Profibus and Modbus exposes loam cake, and this side is provided with the Profibus communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220746061 CN203164640U (en) | 2012-12-31 | 2012-12-31 | Profibus/Modbus protocol conversion module and intelligent circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220746061 CN203164640U (en) | 2012-12-31 | 2012-12-31 | Profibus/Modbus protocol conversion module and intelligent circuit breaker |
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| CN203164640U true CN203164640U (en) | 2013-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103135483A (en) * | 2012-12-31 | 2013-06-05 | 人民电器集团有限公司 | Protocol conversion module and intelligent circuit breaker of Profibus and Modbus |
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- 2012-12-31 CN CN 201220746061 patent/CN203164640U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103135483A (en) * | 2012-12-31 | 2013-06-05 | 人民电器集团有限公司 | Protocol conversion module and intelligent circuit breaker of Profibus and Modbus |
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Effective date of registration: 20140604 Address after: 325604, Yueqing, Zhejiang province Liushi town wide industrial zone Patentee after: ZHEJIANG PEOPLE ELE. APPLIANCE Co.,Ltd. Address before: 325600 Liushi people's Industrial Park, Yueqing, Zhejiang Patentee before: People Electric Appliance Group Co.,Ltd. |
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