CN2485875Y - On-the-spot apparatus - Google Patents
On-the-spot apparatus Download PDFInfo
- Publication number
- CN2485875Y CN2485875Y CN 01204461 CN01204461U CN2485875Y CN 2485875 Y CN2485875 Y CN 2485875Y CN 01204461 CN01204461 CN 01204461 CN 01204461 U CN01204461 U CN 01204461U CN 2485875 Y CN2485875 Y CN 2485875Y
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- computer
- communication bus
- instrument
- output module
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Abstract
The utility model relates to a field apparatus applying open, digital, bidirectional-series and multimode communication bus; the field apparatus is used for controlling, monitoring the remote apparatus/instrument and gathering data. The field apparatus disclosed in the utility model includes: a communication bus which is used for connecting the computer with the remote input/output module, at least one computer which is connected with the communication bus via an adapter card. The computer is plugged in the communication bus. The utility model has at least one adapter card, and one end of the adapter card is connected with the input/output end of the computer, the other end is connected with the communication bus; at least one remote input/output module, which is connected with the communication bus and controlled by the computer or transmits data to the computer.
Description
The utility model relates to a kind of field apparatus, particularly a kind of field apparatus that utilizes open, digitlization, bidirectional linked list, multinode communication bus.
Traditional field apparatus adopts the I/O mode of connection one to one (I/O point is to a measuring control point of equipment) to transmit analog signals or the 24VDC switching value information of 4-20mA, has following shortcoming: 1. a large amount of communication line transmission information of needs; 2. to obtain amount of information few for bottom, can not be integrated with enterprise information system, seriously restricted the realization of the integrated and enterprise's comprehensive automation of company information; 3. remote fault diagnosis, warning function are not strong, and system maintainability is poor.
The purpose of this utility model provides field apparatus that communication bus carries out work of a kind of employing, and described work comprises control, data acquisition, detection etc.
Field apparatus of the present utility model comprises: a communication bus couples together computer and long-range input/output module; At least one computer, this computer is connected with communication bus by an adapter, with computer access communications bus; With the adapter that computer is used, an end of this adapter connects the input/output end port of computer, and the other end is connected with communication bus; At least one long-range input/output module, it is connected with communication bus, accepts the control of computer or to the computer Data transmission.
Long-range input/output module of the present utility model comprises following four kinds at least: the in-site modeling conversion of signals that receives is become the A/D converter that sends the digital signal of computer through communication bus to; Convert computer to send to instrument/instrument analog signal through the digital signal that communication bus transmits; Digital quantity signal is sent to the digital quantity input module of computer through communication bus; Instrument/instrument is connected/is turn-offed the relay output module of control.
Communication bus of the present utility model is a twisted-pair feeder, and meets the PROFIBUS standard.
The utlity model has following advantage: the first, the data that only adopt a communication bus to finish computer and input/output module transmit, and compare with legacy equipment and have saved a large amount of communication lines, thereby reduced cost; The second, can manage concentratedly instrument/instrument, thereby be convenient to data acquisition, analysis instrument/instrument, and to the unified control of instrument/instrument.
Below in conjunction with accompanying drawing the utility model is elaborated.
Fig. 1 is an embodiment of the overall arrangement of field apparatus of the present utility model;
Fig. 2 is another embodiment of the overall arrangement of field apparatus of the present utility model;
Fig. 3 is the circuit diagram of adapter of the present utility model;
Fig. 4 is the circuit diagram of A/D modular converter of the present utility model;
Fig. 5 is the circuit diagram of D/A modular converter of the present utility model;
Fig. 6 is the circuit diagram of digital quantity input module of the present utility model;
Fig. 7 is the circuit diagram of relay output module of the present utility model.
Fig. 1 shows an embodiment of field apparatus of the present utility model.In Fig. 1, field apparatus comprises, a communication bus 3, and it couples together computer and long-range input/output module; A computer 1, this computer 1 is connected with communication bus 3 by an adapter 2, with computer 1 access communications bus 3; An adapter 4, an end of this adapter connects the input/output end port of computer 1, and the other end is connected with communication bus 3; A plurality of long-range input/output modules 4, it is connected with communication bus 3, accepts the control of computer 1 or to computer 1 Data transmission.
Fig. 2 shows another embodiment of field apparatus of the present utility model.In Fig. 2, field apparatus comprises, a communication bus 3, and it couples together two computers 1 and long-range input/output module 4; Two computers 1, the adapter 2 that passes through separately is connected with communication bus 3 respectively, with each computer 1 access communications bus 3; Two adapters 4, an end of each adapter connects the input/output end port of a computer 1, and its other end is connected with communication bus 3; A plurality of long-range input/output modules 4, it is connected with communication bus 3, accepts the control of computer 1 or to computer 1 Data transmission.Embodiment shown in Figure 2 can expand the centralized control of field apparatus and the ability that data centralization is gathered.
The circuit structure and the operation principle of adapter, A/D converter, D/A converter, digital quantity input module and relay output module are described below in conjunction with Fig. 3 to Fig. 7.
The structure of adapter as shown in Figure 3, U13 is the RS485 communication interface in the drawings, U15 to U16 is a photoelectrical coupler, U1 is a central processing unit CPU, and U3 is an address latch, and U4 is EPROM, U6 is a random asccess memory, U7 is the dual port RAM (random access memory) that guarantees the data high-speed exchange, and U8, U9, U11 are the AT-bus interfaces that connects computer 1, and SW-DIP8 and U12 are encoders.Enter the input U15 of photoelectrical coupler from the signal of communication bus 1 through communication interface U13, send into CPU U2 then, send into dual port RAM U7 after treatment, call data and give computer 1.The data of computer output are called data through dual port RAM U7, handle after photoelectrical coupler U14, communication interface U13 send into communication bus 1 through CPU U2 again.SW-DIP8 and U12 constitute encoder, are used for the input/output module addressing.
The structure of A/D converter as shown in Figure 4, U6 is the RS485 communication interface in the drawings, U3 to U5 is a photoelectrical coupler, U1 is a single-chip microcomputer, and SWDIP7 is 7 bit address toggle switchs, guarantees the addressing of main website to slave station, U10 is 12 and approaches A/D converter one by one, U9A, U9B are watchdog circuits, guarantee the stable of single-chip microcomputer, and U14 to U15 is an operational amplifier.After operational amplifier U14 to U15 amplifies, be transformed into digital signal from eight tunnel analog signals of instrument/instrument, after single-chip microcomputer U1 handles, send into communication bus 1 again through photoelectrical coupler U3, U4 and communication interface U6 by A/D converter.
The structure of D/A converter as shown in Figure 5, U6 is the RS485 communication interface in the drawings, and U3 to U5 is a photoelectrical coupler, and U1 is a single-chip microcomputer, SWDIP7 is 7 bit address toggle switchs, guarantee the addressing of main website to slave station, U9 to U11 is a photoelectrical coupler, and U12 is a D/A converter, operational amplifier U8A to U18D, U13A to U13D, U14A to U14D and transistor T 1 to T4 are formed No. four amplifiers, and U15A, U15B are watchdog circuits, guarantee the stable of single-chip microcomputer.Digital signal from communication bus 1 is sent into single-chip microcomputer U1 through communication interface U6, photoelectrical coupler U3, send into D/A converter U12 through photoelectrical coupler U9 to U11 more after treatment, here, convert digital signal to analog signal, give corresponding instrument/instrument by corresponding No. four amplifiers then.
The structure of digital quantity input module as shown in Figure 6, U6 is the RS485 communication interface in the drawings, U3 to U5 is a photoelectrical coupler, U1 is a single-chip microcomputer, SWDIP7 is 7 bit address toggle switchs, guarantees the addressing of main website to slave station, and U8 to U9 is a photoelectrical coupler, U7A, U7B are watchdog circuits, guarantee the stable of single-chip microcomputer.Digital quantity signal from instrument/instrument inputs to single-chip microcomputer U1 through photoelectrical coupler U8, U9, and digital signal is after treatment given communication interface U6 through photoelectrical coupler U4, U5, sends into communication bus 3 by communication interface U6 again.
The structure of relay output module as shown in Figure 7, U6 is the RS485 communication interface in the drawings, U3 to U5 is a photoelectrical coupler, and U1 is a single-chip microcomputer, and SWDIP7 is 7 bit address toggle switchs, guarantee the addressing of main website to slave station, U8 to U9 is a photoelectrical coupler, and U7A, U7B are watchdog circuits, guarantees the stable of single-chip microcomputer, relay R Y1 to RY8 forms No. 8 relay switches, the control that these relays are subjected to photoelectrical coupler U8, U9 conducting or end.Digital signal from communication bus 1 is sent into single-chip microcomputer U1 through communication interface U6, photoelectrical coupler U3, delivers to photoelectrical coupler U8 to U9 after treatment, and when the photoelectrical coupler conducting corresponding with certain road relay, that this relay gets is electric, connect.So just realized the control of computer to remote scene unit (for example fan electromotor).
The utility model can also comprise other input/output module, such as thermoelectricity group modular converter, thermocouple modular converter digital quantity output module etc., to adapt to different detections, controlled function.And the utility model meets " PROFIBUS-FMS " standard especially, can guarantee that any one website has sufficient time to finish communication task in the definite time interval that limits in the communication between the automated system (main website) of complexity; Can between the cyclelog of complexity and simple I/O equipment (slave station), communicate by letter the quick as far as possible real-time Transmission of finishing data again simply.Adopt the token transmission between the main website, main website and slave station adopt the master-slave mode transmission.
Claims (3)
1. field apparatus is characterized in that comprising:
Article one, communication bus couples together computer and long-range input/output module;
At least one computer, this computer is connected with communication bus by an adapter, with computer access communications bus;
With the adapter that computer is used, an end of this adapter connects the input/output end port of computer, and the other end is connected with communication bus;
At least one long-range input/output module, it is connected with communication bus, accepts the control of computer or to the computer Data transmission.
2. field apparatus according to claim 1 is characterized in that long-range input/output module comprises following four kinds at least: the in-site modeling conversion of signals that receives is become the A/D converter that sends the digital signal of computer through communication bus to; Computer is converted to the D/A converter of the analog signal of giving instrument/instrument through the digital signal of communication bus transmission; Digital quantity signal is sent to the digital quantity input module of computer through communication bus; Instrument/instrument is connected/is turn-offed the relay output module of control.
3. field apparatus according to claim 1 is characterized in that described communication bus is a twisted-pair feeder, and meets the PROFIBUS standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01204461 CN2485875Y (en) | 2001-02-27 | 2001-02-27 | On-the-spot apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01204461 CN2485875Y (en) | 2001-02-27 | 2001-02-27 | On-the-spot apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2485875Y true CN2485875Y (en) | 2002-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01204461 Expired - Fee Related CN2485875Y (en) | 2001-02-27 | 2001-02-27 | On-the-spot apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2485875Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964363B (en) * | 2006-11-28 | 2011-12-14 | 上海电器科学研究所（集团）有限公司 | Configurable I/O module with multiple bus interface |
-
2001
- 2001-02-27 CN CN 01204461 patent/CN2485875Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964363B (en) * | 2006-11-28 | 2011-12-14 | 上海电器科学研究所（集团）有限公司 | Configurable I/O module with multiple bus interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |