CN2627745Y - Embedded communication module of field bus control system device - Google Patents
Embedded communication module of field bus control system device Download PDFInfo
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- CN2627745Y CN2627745Y CN 03258148 CN03258148U CN2627745Y CN 2627745 Y CN2627745 Y CN 2627745Y CN 03258148 CN03258148 CN 03258148 CN 03258148 U CN03258148 U CN 03258148U CN 2627745 Y CN2627745 Y CN 2627745Y
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Abstract
The utility model relates to an embedded communication module for on-site bus control system device, which comprises a circuit board, a microprocessor fixedly connected on the circuit board, an external RAM expander circuit, and two communication interface circuits, wherein the microprocessor is expanded into two serial ports by the external RAM expander circuit and respectively connected to the two communication interface circuits, one communication interface circuit is used for communication with the upper computer, and the other communication interface circuit is used for communication with the equipment. The adoption of external embedded structure, expandable serial port and conveniently changeable communication module, and the achievement of communication with the bus and equipment are convenient for the upgrading and updating of the communication bus in the control system; the equipment doesn't need to be change, and only the communication module needs to be changed to facilitate the equipment to be used in various different communication bus system. The external expansion of 32K RAM can also achieve the management of communication data and respectively provide bus data and equipment data with 4Kb FIFO, thus preventing the data from missing during communication.
Description
Technical field
The utility model belongs to the device of the total line traffic control communication equipment of a kind of system for field, particularly relates to a kind of embedded communication module that is used for field bus control system equipment.
Background technology
At present known field bus technique in continuous development and change, and in the equipment of erecting bed bus control system, communications portion and equipment all are to do together, in case the Control on Communication bus request changes or upgrading, all devices that telecommunication circuit is housed all can not be used again.And equipment is very restricted in the application of various different systems.
The utility model content
The utility model provides a kind of embedded communication module that is used for field bus control system equipment that host equipment is realized uniform protocol, can be changed the field bus communication part of control system for solving the technical problem that exists in the known technology.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: it includes circuit board and microprocessor, external RAM expanded circuit and two communication interface circuits of being connected on the circuit board; Microprocessor is extended to the dual serial port through the external RAM expanded circuit, and is connected respectively to two communication interface circuits, and communication interface circuit is used for and the communicating by letter of host computer; Another communication interface circuit is used for and the communicating by letter of equipment.
The utility model can also adopt following technical measures:
It is described that what be used for the communication interface circuit of communicating by letter with host computer and be used for that communication interface circuit with devices communicating adopts is connector.
But the advantage that the utlity model has and good effect be because the extended serial end, can change communication module easily, realization is communicated by letter with bus and equipment, so that the upgrading of communication bus in the control system.Promptly this communication module can be carried out embedded installation by the position, hole of field bus control system equipment plate, and can plug easily in device external by communications connector in the equipment plate shell.More exchange device only needs to replace the corresponding communication module, so that equipment is used for various communication bus system.As extend out the management that 32K RAM expanded circuit also can be realized communication data, and be respectively the FIFO that bus data and device data provide the 4K byte, effectively avoided the loss of data in communication process.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is an embodiment line map of the present utility model;
Fig. 3 is an application structure schematic diagram of the present utility model.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1,2, the utility model expands to two-way UART by external RAM expanded circuit IC4 (SP2338) with the serial port of microprocessor IC1 (SST89C58), the quartzy socket CZ2 of the RJ45 of leading up to, CZ3 link to each other with 422 bus apparatus, and another road links to each other with equipment by 9 pin square type socket CZ1.The TXD of IC1 links to each other with the RX3 of IC4, and RXD links to each other with the TX3 of IC4, and the serial ports 3 of IC4 is as female serial ports, and its transmission rate is 4 times of substring mouth.Can be by changing input clock frequency to obtain different baud rates.Descending address wire ADRI0, ADRI1 and last row address line ADRO0, respectively corresponding three sub-serial ports of ADRO1: serial ports 0, serial ports 1, serial ports 2; Address wire 11 is the address of serial ports 3.Receive data when serial ports 3 and enter when interrupting, microprocessor IC1 reads the state of address wire ADRO0, ADRO1 immediately, can judge according to the state of two address wires the data that receive by which serial ports are uploaded.Respectively the data that receive are deposited among the corresponding FIFO, carry out corresponding data processing.
IC2 is 74HC573 among Fig. 2, IC3 is X62256, IC5 is MAX1482, CZ1 is CON9, CZ2 is CON8, CZ3 is CON8, R1=200, R2=10K, R3-R6=330, R7-R10=10K, R11=1K, R12=1K, C1=100n, C3=27p, C4=27p, C5=10 μ, C6=100n, C7=100n, C8=27P, C9=27P, C10=100n, C11=100n, C12=47 μ, C13=100n, CRY1=11.0592Mhz, CRY2=20Mhz, RP1 is RESPACK4.
Be installed with described whole electronic components of Fig. 2 and connecting line thereof on the communication module circuit board 1 as schematically shown in Figure 3, communication module circuit board 1 is connected employing RS-422 bus mode with host computer, with the host computer junction be pluggable RJ45 socket 2, be defined as follows:
| Pin | Name | Corresponding |
| 1 | RecvData + | |
| 2 | RecvData - | |
| 3 | TxData - | Z | |
| 4 | TxData + | Y | |
| | GND | GND | |
| 6 | RecvData - | GND | |
| 7 | GND | GND | |
| 8 | GND | GND |
Communication module circuit board 1 adopts pluggable 9 pin square type sockets 3 to be connected with devices communicating as shown in Figure 3.Adopt the RS232 bus mode.Each pin is defined as follows:
| Sequence number | | Explanation | |
| 1 | + | Power supply | |
| 2 | / | ||
| 3 | IRQ | The device |
|
| 4 | TX | The equipment serial data sends |
|
| 5 | / | ||
| 6 | RX | The equipment serial data receives |
|
| 7 | INT | Module request repeat data | |
| 8 | | Ground | |
| 9 | GND | Ground |
Claims (2)
1. embedded communication module that is used for field bus control system equipment, it includes circuit board and microprocessor, external RAM expanded circuit and two communication interface circuits of being connected on the circuit board; Microprocessor is extended to the dual serial port through the external RAM expanded circuit, and is connected respectively to two communication interface circuits, and communication interface circuit is used for and the communicating by letter of host computer; Another communication interface circuit is used for and the communicating by letter of equipment.
2. the embedded communication module of field bus control system equipment according to claim 1 is characterized in that described what be used for the communication interface circuit of communicating by letter with host computer and be used for that communication interface circuit with devices communicating adopts is connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03258148 CN2627745Y (en) | 2003-07-29 | 2003-07-29 | Embedded communication module of field bus control system device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03258148 CN2627745Y (en) | 2003-07-29 | 2003-07-29 | Embedded communication module of field bus control system device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2627745Y true CN2627745Y (en) | 2004-07-21 |
Family
ID=34254597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03258148 Expired - Fee Related CN2627745Y (en) | 2003-07-29 | 2003-07-29 | Embedded communication module of field bus control system device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2627745Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2166708A2 (en) * | 2008-09-23 | 2010-03-24 | Fisher-Rosemount Systems, Inc. | Apparatus and methods to communicatively couple field devices to controllers in a process control system |
| CN105785826A (en) * | 2016-04-13 | 2016-07-20 | 珠海格力电器股份有限公司 | Data communication device and system |
-
2003
- 2003-07-29 CN CN 03258148 patent/CN2627745Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2166708A2 (en) * | 2008-09-23 | 2010-03-24 | Fisher-Rosemount Systems, Inc. | Apparatus and methods to communicatively couple field devices to controllers in a process control system |
| EP2166708A3 (en) * | 2008-09-23 | 2014-09-03 | Fisher-Rosemount Systems, Inc. | Apparatus and methods to communicatively couple field devices to controllers in a process control system |
| EP3657737A1 (en) * | 2008-09-23 | 2020-05-27 | Fisher-Rosemount Systems, Inc. | Apparatus and methods to communicatively couple field devices to controllers in a process control system |
| CN105785826A (en) * | 2016-04-13 | 2016-07-20 | 珠海格力电器股份有限公司 | Data communication device and system |
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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 |