CN201274486Y - Analogue signal input module based on CANopen protocol - Google Patents
Analogue signal input module based on CANopen protocol Download PDFInfo
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- CN201274486Y CN201274486Y CNU2008202182678U CN200820218267U CN201274486Y CN 201274486 Y CN201274486 Y CN 201274486Y CN U2008202182678 U CNU2008202182678 U CN U2008202182678U CN 200820218267 U CN200820218267 U CN 200820218267U CN 201274486 Y CN201274486 Y CN 201274486Y
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- input module
- analog quantity
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Abstract
The utility model discloses an analog input module based on the CAN open protocol, which comprises a CPU control unit, a signal input unit, a CAN open communication unit, a parameter storage unit and an expansion interface unit. The CAN open communication unit, the parameter storage unit and the expansion interface unit are connected with the CPU control unit by internal buses capable of two-way communicating; the signal input unit is connected with the CPU control unit by internal buses capable of one-way communicating and also connected with the device-level network of a controlled device in the way of one-way communicating; and the CAN open communication unit is connected with a train-level network through a CAN open network. Compared with the prior art, the digital input module improves the real-time performance of data transmission, reduces the manufacturing cost, enhances the reliability of data transmission and the flexibility and commonality of the CAN open network; so the digital input module is quite suitable for the application fields of industrial field bus.
Description
Technical field
The utility model relates to a kind of analog quantity input module based on the CANopen agreement, especially relates to the conversion equipment of analog quantity input signal between CANopen network and the device level network.
Background technology
The CANopen network is a kind of network that designs for industrial field bus specially, a large amount of high reliability fieldbus networks that use have been become at present both at home and abroad, but because it is professional too strong, external interface also is not convenient especially, often needs could communicate by letter with controlled device through gateway.Train network need be transmitted a large amount of analog quantity input signals, for guaranteeing the real time communication and the reliability service of device level bus data and train level bus data, the settling mode that adopts mainly contains two kinds at present: a kind of is to adopt traditional PLC to constitute collective and distributive type control system, is called for short DCS; Another kind is to adopt Fieldbus Based distributed I/O system.A kind of advantage of mode is before adopting: controlled function is strong, reliability height, exploitation easily; Shortcoming is that system is not open, hardware investment is big, wiring is complicated, inconvenient maintenance, has tangible limitation.Though and the employing second way can overcome the deficiency of preceding a kind of mode, the product needed import, cost of investment is higher.
Summary of the invention
The purpose of this utility model provides a kind of analog quantity input module based on the CANopen agreement, should improve the real-time and the reliability of the analog quantity input signal transmission between train level CANopen network and the device level network, and is with low cost again.
For achieving the above object, the technical solution of the utility model is achieved in that a kind of analog quantity input module based on the CANopen agreement, comprise the CPU control unit, signal input unit, the CANopen communication unit, parameter storage unit and extended interface unit, the CANopen communication unit, parameter storage unit, but extended interface unit is connected with the CPU control unit by the internal bus of two-way communication, but signal input unit is connected with the CPU control unit by the internal bus of one-way communication, but described signal input unit is connected with the device level network of controlled device by the one-way communication mode, and described CANopen communication unit is connected with train level network by the CANopen network mode.
CANopen communication unit described in the utility model is made up of CANopen bus transceiver and photoelectric isolating circuit.
CANopen bus transceiver described in the utility model is by digital signal being converted to two-wire differential networks signal or being that the unit of function circuit of digital signal is formed with two-wire differential networks signal decoding.
CPU control unit described in the utility model is the AT91SAM7A3 master controller.
Signal input unit described in the utility model is made up of analog quantity input interface and photoelectric isolating circuit.
Compared with prior art, the utlity model has following beneficial effect:
1, because the analog quantity input signal that analog quantity input interface of the present utility model collects can be converted into CANopen network available signal through the CPU control unit, improved real time of data transmission.
2, because the utility model has changed analog quantity input signal process I/O integrated circuit board under the traditional mode, pass through the data transmission procedure of CANopen gateway again, digital quantity signal collection and CANopen procotol conversion equipment are integrated in single module, reduce manufacturing cost, improved reliability of data transmission.
3, because the utility model has increased the analog quantity input interface on the CANopen network unit-switch, make the CANopen network can be adapted to the digital quantity transmission of all devices level network, improve CANopen network more flexible and versatility, be very suitable for the application of industrial field bus.
Description of drawings
The utility model has an accompanying drawing, wherein:
Fig. 1 is based on the structured flowchart of the analog quantity input module of CANopen agreement.
Among the figure: 1, signal input unit, 2, the CANopen communication unit, 3, the CPU control unit, 4, parameter storage unit, 5, external interface unit.
Embodiment
The utility model is further described below in conjunction with accompanying drawing.As shown in Figure 1, a kind of analog quantity input module based on the CANopen agreement, comprise CPU control unit 3, signal input unit 1, CANopen communication unit 2, parameter storage unit 4 and extended interface unit 5, described CANopen communication unit 2, parameter storage unit 4, but extended interface unit 5 is connected with CPU control unit 3 by the internal bus of two-way communication, but signal input unit 1 is connected with CPU control unit 3 by the internal bus of one-way communication, but described signal input unit 1 is connected with the device level network of controlled device by the one-way communication mode, and described CANopen communication unit 2 is connected with train level network by the CANopen network mode.Described CANopen communication unit 2 is made up of CANopen bus transceiver and photoelectric isolating circuit.Described CANopen bus transceiver is by digital signal being converted to two-wire differential networks signal or being that the unit of function circuit of digital signal is formed with two-wire differential networks signal decoding.Described CPU control unit 3 is AT91SAM7A3 master controllers.Described signal input unit 1 is made up of analog quantity input interface and photoelectric isolating circuit.
During the utility model work, the CANopen bus transceiver of described CANopen communication unit 2 is as the electric interfaces of the high-frequency isolation transformer in external circuit CANopen protocol controller and the CANopen communication unit 2, the digital signal that the CANopen protocol controller is sent here converts differential signal to, then this signal is delivered to the CANopen agreement control chip of CPU control unit 3 through photoelectric isolating circuit, the differential networks signal decoding of perhaps photoelectric isolating circuit being sent here becomes digital signal, sends into external circuit CANopen protocol controller.The task of the photoelectric isolating circuit of described CANopen communication unit 2 is that the signal of CPU control unit 3 is sent into the CANopen bus transceiver after light is isolated, perhaps the signal of CANopen bus transceiver is delivered to CPU control unit 3 after light is isolated, the effect of the photoelectric isolating circuit of described CANopen communication unit 2 is to improve antijamming capability.Described AT91SAM7A3 master controller is as the core devices of analog quantity input module, the data flow that the analog quantity input signal data of signal input unit 1 transmission is packaged into CANopen procotol defined is delivered to the CANopen bus transceiver, perhaps the signal resolution that the CANopen bus transceiver is sent here becomes normal data and deposits it in self buffer area, read for the CANopen controller, the effect of its hardware mainly is to be responsible for the work schedule of control CANopen protocol controller chip and the generation of analog quantity input traffic, also will provide monitoring voltage simultaneously, dongle and working power etc.The analog quantity input interface of described signal input unit 1 is the external tapping circuit to the device level network, and the effect of the photoelectric isolating circuit of described signal input unit 1 is to improve antijamming capability.
Claims (5)
1, a kind of analog quantity input module based on the CANopen agreement, it is characterized in that: described analog quantity input module comprises CPU control unit (3), signal input unit (1), CANopen communication unit (2), parameter storage unit (4) and extended interface unit (5), described CANopen communication unit (2), parameter storage unit (4), extended interface unit (5) but internal bus by two-way communication be connected with CPU control unit (3), signal input unit (1) but internal bus by one-way communication be connected with CPU control unit (3), described signal input unit (1) but be connected with the device level network of controlled device by the one-way communication mode, described CANopen communication unit (2) passes through the CANopen network mode and is connected with train level network.
2, the analog quantity input module based on the CANopen agreement according to claim 1, it is characterized in that: described CANopen communication unit (2) is made up of CANopen bus transceiver and photoelectric isolating circuit.
3, the analog quantity input module based on the CANopen agreement according to claim 2 is characterized in that: described CANopen bus transceiver is by digital signal being converted to two-wire differential networks signal or being that the unit of function circuit of digital signal is formed with two-wire differential networks signal decoding.
4, the analog quantity input module based on the CANopen agreement according to claim 1, it is characterized in that: described CPU control unit (3) is the AT91SAM7A3 master controller.
5, the analog quantity input module based on the CANopen agreement according to claim 1, it is characterized in that: described signal input unit (1) is made up of analog quantity input interface and photoelectric isolating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202182678U CN201274486Y (en) | 2008-09-26 | 2008-09-26 | Analogue signal input module based on CANopen protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202182678U CN201274486Y (en) | 2008-09-26 | 2008-09-26 | Analogue signal input module based on CANopen protocol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201274486Y true CN201274486Y (en) | 2009-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202182678U Expired - Fee Related CN201274486Y (en) | 2008-09-26 | 2008-09-26 | Analogue signal input module based on CANopen protocol |
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| CN (1) | CN201274486Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591308A (en) * | 2012-03-12 | 2012-07-18 | 长治市潞安合力机械有限责任公司 | Controller area network (CAN) bus mining locomotive control, measurement and protection device |
| CN104683414A (en) * | 2013-11-28 | 2015-06-03 | 北车大连电力牵引研发中心有限公司 | Engineering vehicle network control system and engineering vehicle |
-
2008
- 2008-09-26 CN CNU2008202182678U patent/CN201274486Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591308A (en) * | 2012-03-12 | 2012-07-18 | 长治市潞安合力机械有限责任公司 | Controller area network (CAN) bus mining locomotive control, measurement and protection device |
| CN104683414A (en) * | 2013-11-28 | 2015-06-03 | 北车大连电力牵引研发中心有限公司 | Engineering vehicle network control system and engineering vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20110926 |