CN207440541U

CN207440541U - A kind of redundancy communication controller based on arm processor

Info

Publication number: CN207440541U
Application number: CN201721272487.4U
Authority: CN
Inventors: 郑陆君
Original assignee: SHANGHAI WEICHENG ELECTRIC EQUIPMENT CORP
Current assignee: SHANGHAI WEICHENG ELECTRIC EQUIPMENT CORP
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2018-06-01
Anticipated expiration: 2027-09-29

Abstract

The utility model discloses a kind of redundancy communication controllers based on arm processor, it is characterized in that, including arm processor group, arm processor group includes the arm processor of two interconnections, arm processor group connects remote I/O data collector by two RS485 bus network, arm processor group connects monitoring device by two RS485 bus network, and multiple UART ports, I are integrated on arm processor²C, SPI interface.The utility model hardware realization is simple, reliable, and production cost is low, and debugging simply, conveniently, has played the hardware benefits under two kinds of communication modes, improved the communication reliability of remote I/O data collector and monitoring device to greatest extent.

Description

A kind of redundancy communication controller based on arm processor

Technical field

The utility model is related to a kind of redundancy communication controllers based on arm processor, belong to industrial production control process In, the data communication technology field of monitoring device and remote I/O data collector.

Background technology

Industrial production control during, traditional monitoring signal measurement method be by spot sensor output resistance, The signals such as potential, electric current are transmitted to conducting wire on the computer monitoring device or measuring instrumentss of control room, carry out data acquisition and Display.This mode needs substantial amounts of signal cable, and production cost is high.In order to save signal cable and project installation expense, work Occur local mounted embedded remote I/O data collectors in industry.Collector is connected to form distributed survey by twisted-pair feeder Amount system, then by on-scene communication bus data transfer to control room monitoring device.Due to remote I/O data collector Measurement data be by digital quantity mode remote transmission, there is strong antijamming capability, high certainty of measurement, and scene Installing engineering is at low cost, therefore widely used by industrial processes.

In order to which the data communication between embedded remote I/O data collector equipment is better achieved, often with communication Controller carries out redundancy communication management to collector.Since communication controler is generally using multi -CPU working method, data are improved The real-time and reliability of communication.

Since RS485 bus communication modes realize simple, reliable, the extensive use during industrial production control. Fig. 1 is the double-network redundant communication controler functional block diagram realized using multi -CPU, dual port RAM mode, mainly by four microprocessors Device, two dual port RAMs and 4 road RS485 communication interface circuits compositions.

Double-network redundant communication generally has two ways, such as the parallel communication of double nets and double net switching communications：

(1) the parallel communication of double nets

Two networks are carried out at the same time communication, and the communication data on a network is as another backup.It realizes process For：The measurement data of the remote I/O of upload is write dual port RAM by MCU1 by network A, and MCU2 takes out data from dual port RAM By corresponding transmission of network to monitoring device, the course of work of another network is identical；

(2) double net switching communications

For a usual network as major network into row data communication (such as network A), another network is used as secondary net spare, It communicates again when needing (such as network B).

A. major network MCU1 reads the measurement data of remote I/O from network A, if communicating successfully, writes data to dual port RAM In, MCU2 reads data from dual port RAM and sends monitoring device to；If communication is unsuccessful, MCU1 notifies MCU3 to be read from network B The measurement data of remote I/O is taken, corresponding MCU4 and monitoring device swap data.

B. when major network communication recovery is normal, then MCU1 notifies MCU3 to stop communication.

The advantages of this double net switching communication mode is can mitigate monitoring device and long-range I/O data collectors logical Trust business burden, a communication network is only needed to carry out data exchange when normal.

This double-network redundant communication mode being made of four CPU, the Micro-processor MCV switching communication in two networks When, it is necessary to transfer handshake, and with handshake whole system data transfer is made to become comparatively laborious.And the communication mode institute The hardware device needed is more, and the capacity of dual port RAM is small, it is impossible to meet the needs of communicating now.

The content of the invention

The technical problems to be solved in the utility model is：Provide it is a kind of it is simple, reliable, production cost is low based on ARM The redundancy communication controller of processor, it is more to solve the required hardware device of existing communication mode, the capacity of dual port RAM It is small, when switching communicates, by transferring the problem of handshake is comparatively laborious.

In order to solve the above-mentioned technical problem, the technical solution of the utility model there is provided a kind of based on arm processor Redundancy communication controller, which is characterized in that including arm processor group, arm processor group is included at the ARM of two interconnections Device is managed, arm processor group connects remote I/O data collector by two RS485 bus network, and arm processor group passes through two A RS485 bus network connects monitoring device, and multiple UART ports, I are integrated on arm processor²C, SPI interface.

Preferably, two arm processors in the arm processor group are respectively the first arm processor and the 2nd ARM Processor, two RS485 bus network are respectively the first RS485 bus network and the 2nd RS485 bus network.

Preferably, a UART interface of first arm processor is connected long-range by the first RS485 bus network I/O data collectors, another UART interface of the first arm processor connect monitoring device by the first RS485 bus network； One UART interface of the second arm processor connects remote I/O data collector, the 2nd ARM by the 2nd RS485 bus network Another UART interface of processor connects monitoring device by the 2nd RS485 bus network.

Preferably, a UART interface of first arm processor is connected long-range by the first RS485 bus network I/O data collectors, another UART interface of the first arm processor connect remote I/O number by the 2nd RS485 bus network According to collector, a UART interface of the second arm processor connects monitoring device, the 2nd ARM by the first RS485 bus network Another UART interface of processor connects monitoring device, the first arm processor and second by the 2nd RS485 bus network Pass through SPI interface or I between arm processor²C interface connects.

The hardware realization of the utility model is simple, reliable, and production cost is low, and debugging simply, conveniently, plays to greatest extent Hardware benefits under two kinds of communication modes improve the communication reliability of remote I/O data collector and monitoring device.This practicality It is new by adjusting communication interface connecting object, realize a kind of double-network redundant communication controler for changing, combining.

Description of the drawings

Fig. 1 is the double-network redundant communication controler functional block diagram realized using multi -CPU, dual port RAM mode；

Fig. 2 makees communication interface when parallel communication uses for a kind of double nets of the redundancy communication controller based on arm processor Connection diagram；

Fig. 3 is that a kind of double nets of redundancy communication controller based on arm processor make communication interface when switching communication uses Connection diagram.

Specific embodiment

To be clearer and more comprehensible the utility model, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.

Embodiment 1

With the development of microelectric technique, multiple UART ports, I are integrated²C, 32 arm processors of SPI interface are in insertion It is widely applied in formula system, the utility model realizes that a kind of double-network redundant for changing, combining communicates by two arm processors Controller.

A kind of redundancy communication controller based on arm processor, as shown in Fig. 2, it includes arm processor group, ARM processing Device group includes the arm processor of two interconnections, and arm processor group connects remote I/O number by two RS485 bus network According to collector, arm processor group connects monitoring device by two RS485 bus network, is integrated on arm processor multiple UART port, I²C, SPI interface.

Two arm processors in arm processor group are respectively the first arm processor and the second arm processor, two RS485 bus network is respectively the first RS485 bus network and the 2nd RS485 bus network.One of first arm processor UART interface connects remote I/O data collector, another UART of the first arm processor by the first RS485 bus network Interface connects monitoring device by the first RS485 bus network；One UART interface of the second arm processor passes through second RS485 bus network connects remote I/O data collector, another UART interface of the second arm processor passes through the 2nd RS485 Bus network connects monitoring device.

In the present embodiment, double nets of communication controler are made parallel communication and are used, and communication interface connection is as shown in Figure 2.RS485 Bus network A (i.e. the first RS485 bus network) is by ARM₁Processor (i.e. the first arm processor) manages, ARM₁Processor is from one A UART interface reads the measurement data of remote I/O data collector by RS485 bus network A, then from another UART Interface gives monitoring device by RS485 bus network.RS485 bus network B (i.e. the 2nd RS485 bus network) is by ARM₂Place It manages device (i.e. the second arm processor) to manage, communication process and ARM₁Processor is identical.

Embodiment 2

In the present embodiment, as shown in figure 3, a UART interface of the first arm processor passes through the first RS485 bus network Remote I/O data collector is connected, another UART interface of the first arm processor is connected by the 2nd RS485 bus network Remote I/O data collector, a UART interface of the second arm processor connect monitoring dress by the first RS485 bus network It puts, another UART interface of the second arm processor connects monitoring device, the first ARM processing by the 2nd RS485 bus network Pass through SPI interface or I between device and the second arm processor²C interface connects.

Double nets of communication controler are made switching communication and are used, and communication interface is connected as shown in figure 3, its course of work is as follows：

(1)ARM₁Processor (i.e. the first arm processor) is first from RS485 bus networks A (i.e. the first RS485 bus network) Read the measurement data of certain remote I/O data collector：

If a. communicating successfully, measurement data is passed through SPI interface or I²C interface gives ARM₂Processor (i.e. the 2nd ARM Processor), ARM₂Processor gives monitoring device data again；

If b. communication is unsuccessful, ARM₁Processor is then read from RS485 bus networks B (i.e. the 2nd RS485 bus network) The measurement data of this remote I/O data collector：If communicating successfully, measurement data is passed through SPI interface or I²C interface is sent To ARM₂Processor, ARM₂Processor gives monitoring device data again；If communication is unsuccessful, then it represents that this remote I/O data Collector may break down, and ARM is given with the equipment failure state data of agreement₂Processor, ARM₂Processor is again data Monitoring device is given, prompts live certain equipment problematic.

(2)ARM₁The step of processor continues to read the measurement data of next remote I/O data collector, repeat (1).

Other are same as Example 1.

The communication network switching of the utility model, without handshake, is realized simple, reliable by a processor management.

It is required according to user's on-scene communication, can set and adjust interface connecting object with software, to change the logical of controller Believe working method, i.e. ARM in Fig. 2₁Processor, ARM₂Two UART interface working methods of processor all lead one from Xiang Yuan for one Journey I/O data collectors ask the conduct " master " of measurement data, the conduct " from " of the request of data of response monitoring device；In Fig. 3 ARM₁Two UART interface working methods of processor to remote I/O data collector request measurement data are all " master ", ARM₂Place Two UART interface working methods for managing the request of data of device response monitoring device are all " from ".It is this according to communication mode with soft The advantages of part changes hardware realization function, and maximum has played two kinds of hardware connection modes.With the utility model realize change, The redundancy communication controller of combination, improves equipment telecommunication management ability and reliability, so as to enhance the applicability of equipment.

Claims

1. a kind of redundancy communication controller based on arm processor, which is characterized in that including arm processor group, arm processor Group includes the arm processor of two interconnections, and arm processor group connects remote I/O data by two RS485 bus network Collector, arm processor group connect monitoring device by two RS485 bus network, multiple UART are integrated on arm processor Mouth, I²C, SPI interface.

A kind of 2. redundancy communication controller based on arm processor as described in claim 1, which is characterized in that the ARM Two arm processors in processor group are respectively the first arm processor and the second arm processor, two RS485 bus network Respectively the first RS485 bus network and the 2nd RS485 bus network.

3. a kind of redundancy communication controller based on arm processor as claimed in claim 2, which is characterized in that described the One UART interface of one arm processor connects remote I/O data collector by the first RS485 bus network, at the first ARM Another UART interface for managing device connects monitoring device by the first RS485 bus network；One UART of the second arm processor Interface connects remote I/O data collector, another UART interface of the second arm processor by the 2nd RS485 bus network Monitoring device is connected by the 2nd RS485 bus network.

4. a kind of redundancy communication controller based on arm processor as claimed in claim 2, which is characterized in that described the One UART interface of one arm processor connects remote I/O data collector by the first RS485 bus network, at the first ARM Another UART interface for managing device connects remote I/O data collector, the second arm processor by the 2nd RS485 bus network A UART interface pass through the first RS485 bus network connect monitoring device, another UART interface of the second arm processor Monitoring device is connected by the 2nd RS485 bus network, passes through SPI interface between the first arm processor and the second arm processor Or I²C interface connects.