CN200997073Y - Universal digital-controlled system based on digital ring bus - Google Patents

Abstract

The utility model discloses a general-purpose numerical control system based on an all-digital ring bus, which includes a master device and a slave device; the master device includes a host computer (1) equipped with numerical control software and a bus controller (2); the slave device includes a bus Servo drive (3) and PLC, the master device is serially connected with 1-24 slave devices and connected back to the master device to form a closed loop, the master device and the slave device are connected through a link connected by the physical layer and the transmission medium Data transmission; wherein, the bus controller (2) is a plug-in card structure, is connected with the main board based on the X86 architecture through the bus interface on the main board, and communicates with the X86CPU on the main board. The utility model relies on the way of industrial control main board + bus controller plug-in card, aiming at improving the expandable performance of the system.

Description

Universal Numerical Control System Based on All-Digital Ring Bus

technical field

The utility model relates to an all-digital bus-type numerical control system, more specifically, relates to the setting method of the bus controller in the ring-shaped full-digital bus-type numerical control system.

Background technique

The architecture of traditional CNC machine tools is determined by the form of transmitted data. The following types can be seen in the market: analog data (as shown in Figure 1), digital pulse type (as shown in Figure 2), and bus type (as shown in Figure 3). Each of these three structures has its own characteristics. At present, in the domestic market, most of the analog quantities transmit data. This structure of transmitting speed data with pulse commands is now common in low-end CNC systems, and the high-end ones are already in the analog and digital bus market.

In the two numerical control structures of pulse type and analog quantity transmission data, there is a structure called CNC (numerical control) controller. The working mode of this structure is briefly summarized as follows: the speed or position signal transmitted by the CNC software of the upper computer , sent to the CNC controller through some kind of bus. The CNC controller converts this signal into an analog quantity (usually ±10V) or pulse command (realized by counting and timing) that the servo driver can recognize. After receiving this command, the servo driver performs related calculations and controls the power part so that the servo motor follows At the same time, the actual running position of the servo driver is fed back to the servo driver through the position detection device, and the servo driver calculates the actual speed and position of the motor according to the feedback signal, adjusts the control accuracy, and completes a control cycle; at the same time, the data of the position detection device It also feeds back to the CNC controller, and through the CNC controller, the feedback data of the position detection device is sent to the numerical control software of the upper computer to participate in the calculation of the position loop to achieve the purpose of position loop control.

It is not difficult to see from the above structure that a numerical control controller is added in the middle of the structure of the pulse command type and the analog type numerical control controller to convert the data from the upper computer and the numerical control software. In this case, the intermediate links are more complicated. Due to the existence of analog-digital and other links in the process of data conversion and transmission, it is easy to cause precision loss and transmission conversion errors in the transmission process. At the same time, due to the increase of intermediate links, the probability of system interference will also increase, and the instability factors of the system will increase. Another point is that the existence of the CNC controller link itself will increase the cost.

The emergence of digital servo device is an important milestone in the history of numerical control technology development. With digital servos, all command and actual values are processed within a single microcontroller. This kind of servo device can not only realize traditional current loop and speed loop control, but also complete fine interpolation in a very short time to realize position loop control.

The architecture of bus-type numerical control system is the trend of numerical control development in the future. All major numerical control system manufacturers have made a lot of investment in this aspect and designed many bus systems for it.

The vast majority of bus-type numerical control adopts a similar structure as shown in Figure 3. Usually this structure is open, using an industrial-grade computer, and then inserting a bus controller board specially developed for the bus protocol used by the system on the computer; connecting the servo with a bus interface through the bus controller board driver. The working process is roughly as follows: In the interpolation cycle of a fixed time, the CNC software sends the data to be controlled to the bus controller board through the bus interface on the main board, and the bus controller board packs and sends the data according to the corresponding bus protocol. Go to the bus network; the digital bus servo driver receives these data packets, extracts the effective position interpolation data, speed and other data, and performs control algorithm operations to control the servo motor. At the same time, the servo drive adjusts the speed and position according to the feedback data of the position detection device of the motor to complete its own control cycle; the feedback signal of the position detection device is fed back to the CNC software through the bus channel of the digital servo drive at the same time, and the CNC software extracts the data. The NC algorithm performs position interpolation and other control algorithm operations, enters the next interpolation cycle, and issues commands for this interpolation cycle.

In the above digital bus numerical control system, the upper computer and the bus controller are connected by plug-in card, which has the characteristics of convenient and flexible mechanism. However, in industrial sites, due to the complex site environment, especially in the electrical environment with many motors, the golden finger connection has the potential danger of poor contact, which is more dangerous for CNC machine tools.

Therefore, some manufacturers with motherboard development capabilities have taken a compromise solution in terms of openness and reliability, developed their own motherboards for industrial environments, and placed the bus controller on the CPU motherboard. However, due to the limitations of the era and hardware conditions at that time, these motherboards integrated with bus controllers usually use multi-CPU interfaces, which is relatively wasteful of resources and complex in structure. In order to reduce the cost of repeated development, this structure has been retained to this day.

As an independent process digital controller, the numerical control system is used in industrial automation production. Its multi-task performance is that its management software must complete the two major tasks of management and control. Among them, system management includes input, I/O processing, communication, display, diagnosis, and processing program management. The control part of the system includes: decoding, cutter compensation, speed processing, interpolation and position control, etc. Therefore, the software structure of the modern open CNC system is usually relatively large and requires high-performance computer hardware as a support, and the current high-speed development of the X86 structure CPU system can well meet this demand. In addition, an important manifestation of the openness of the CNC system is the versatility of its operating system. The structure is designed to adopt two multitasking operating systems, windowsNT and Debian Linux, and supports CPUs with X86 structure so far. In this structure, according to the strict real-time requirements of the numerical control system, the real-time performance of the operating system has been transformed.

Contents of the invention

Aiming at the above-mentioned problems, the utility model proposes an open and flexible all-digital ring-type bus numerical control system, relying on the way of industrial control main board + bus controller plug-in card, aiming at improving the expandability of the system.

In order to achieve the above-mentioned purpose, the utility model first constructs a set of full-digital ring bus numerical control system, including master equipment and slave equipment; the master equipment includes a host computer and a bus controller equipped with numerical control software; type servo drive and PLC. The master device is serially connected with 1-24 slave devices and connected back to the master device to form a closed loop. The master device and the slave device transmit data through the link connected by the physical layer and the transmission medium. Under normal working conditions, Data is transmitted in one direction. And the numerical control system of the present utility model is characterized in that the above-mentioned bus controller adopts a plug-in card structure, is connected with the main board based on the X86 architecture through the bus interface on the main board, and communicates interactively with the X86CPU on the main board.

In the above-mentioned universal numerical control system based on full-digital ring bus, the main board interface of the bus controller is PCI, PC104PLUS or PCIE interface. In the preferred mode, the PCI interface is selected.

On the basis of selecting the PCI interface, the utility model is based on an all-digital ring bus type universal numerical control system, and its further improvement is that the bus controller includes a power management module, a PC bus control module, a bus protocol analysis module, a data buffer area, a connection The physical layer control module of the physical layer interface, the machine tool data storage area and the CNC system enabling module. Among them, the X86CPU on the main board sends data to the data buffer area through the PC bus control module; the bus protocol analysis module accesses the data buffer area, obtains the data and converts it into an instruction conforming to the bus protocol, and then relies on the physical layer control module through the physical layer The interface sends data to the slave device. The feedback information from the slave device is sequentially sent to the data buffer area through the physical layer interface, the physical layer control module, and the bus protocol analysis module; the host computer accesses the data buffer area through the PC bus control module to obtain data. In addition, the machine tool data storage area is used to store the latest configuration data of the machine tool, and exchange data with the upper computer through the PC bus control module.

In a preferred manner, the above-mentioned PCI bus control module, bus protocol analysis module, and physical layer control module are realized by an integrated system on chip FPGA. In addition, while the bus controller sets the data output and input interfaces, it also specially sets an interface directly connected to the machine tool keyboard. The above-mentioned interface is preferably realized by using an Ethernet physical layer interface.

Through the above-mentioned technical scheme, the utility model is based on the all-digital ring bus general-purpose numerical control system, and has the following outstanding features in terms of hardware:

1. Due to the adoption of the X86 system general motherboard, it has high flexibility.

2. Low cost. Due to the large shipment volume and common components, the manufacturing cost of general-purpose motherboards is much lower than that of special-purpose motherboards.

3. The memory can be expanded at will to improve the operating performance

4. Due to the improvement of CPU main frequency and comprehensive performance of the existing general-purpose motherboard, as well as the support of complex multimedia instruction sets, this structure can run various large-scale CAM/CAD software very well, and carry out pre-simulation processing and 3D on-site Simulation, powerful.

5. Plug-in bus controller, good versatility and openness.

6. The bus controller based on the FPGA structure, the Ethernet physical layer is used as the input and output interface, not only can support the current powerful bus standards such as SERCOS III, ProfiBus.Net, etc., but also can develop and design the bus standard suitable for itself according to the needs , with strong scalability.

7. Separately assign the peer-to-peer bus interface for the machine keyboard, improve the response level and time of the machine keyboard, and make the system operation faster and more reliable.

8. The large-capacity designed single-chip FPGA is used to realize the mainboard bus bridging function, bus data protocol analysis and physical layer control, which can meet the analysis of different protocols. It not only supports SERCOS III, ProfiBus.Net protocol, but also can be customized such as based on Ethernet The real-time bus protocol of the network physical layer further expands the scope of application.

9. In order to complete complex calculations and precise position interpolation, this system can be configured with a digital bus servo drive, which has powerful calculation processing capabilities and a built-in high-speed position loop control algorithm, which can analyze the running track and estimate the speed and position running curve.

Description of drawings

Fig. 1 is a schematic diagram of a numerical control system topology structure realized by selecting analog data in the prior art;

Fig. 2 is a schematic diagram of the topology structure of a digital pulse type numerical control system in the prior art;

Fig. 3 is a schematic diagram of the topology structure of a bus type numerical control system in the prior art;

Fig. 4 is a schematic diagram of the topology of an all-digital ring bus type numerical control system involved in the present invention;

Fig. 5. is the schematic diagram of an embodiment of the utility model;

Fig. 6 is a schematic structural diagram of the bus controller in Fig. 5;

Fig. 7 is the composition schematic diagram that realizes the data transmission line of the numerical control system of the present invention;

Fig. 8 is a schematic diagram of the cycle sequence realized in an embodiment of the numerical control system of the present invention;

Fig. 9 is a data structure diagram realized in the same embodiment as Fig. 8;

Fig. 10 is a data organization structure diagram of the writing part realized in the same embodiment as Fig. 9;

Fig. 11 is a data organization structure diagram of the read part realized in the same embodiment as Fig. 9 .

Detailed ways

As shown in Figure 4, the topology structure of an all-digital ring bus numerical control system is described in the Chinese patent application "A bus numerical control system and its control method" submitted by the applicant on the same day. The utility model is further defined and perfected on the basis of the above application, aiming at improving the expansibility of this kind of all-digital ring bus type numerical control system. Therefore, the above-mentioned applications are incorporated herein by reference, which will be more helpful for understanding the gist and characteristics of the present utility model.

To this end, this type of numerical control system will be described in detail below.

In order to realize this kind of numerical control system, a transmission protocol can be defined in two aspects of the physical layer and the data link layer, or the current popular protocol can be directly selected. For example, the main contents include: topology, data transmission line composition, signal encoding format, telegraph Structure, working sequence, non-periodic data transmission, interface initialization, configuration and transmission of periodic data, setting of servo device operation mode, fault diagnosis and treatment, etc. Here, this article provides a feasible solution, which is intended to schematically represent the protocol structure required by the utility model, and the protection scope of the utility model is not limited to the protocol structure. Depending on the specific circumstances, the definition of the agreement will change.

1. Physical layer

The physical layer is located at the lowest layer of the communication system and is the basis of the entire communication. It provides transmission media (cables, optical fibers, etc.) and interconnection devices (plugs, sockets, etc.) for data communication between devices, provides access for data transmission, and is responsible for data transmission. and related management work. The physical layer protocol of the system mainly defines the topology, the composition of the data transmission line and the signal encoding format.

2. Topology

The system uses a ring structure as the most basic topology. The ring is composed of masters, slaves and transmission lines. Each ring has only one master and the rest are slaves. The data is transmitted between the devices through the link connected by the Ethernet physical layer, and the data flows in one direction on the transmission line.

As shown in Figure 4, the connection form of the master device (including the bus controller) and the slave device (including the full digital bus servo controller). A master device can have multiple slave devices. Currently, the maximum number of slave devices that can be connected as a loop is 24, leaving room for expansion.

Note: Although the slave devices are interconnected through Category 5 twisted-pair wires, data communication cannot be performed directly between the slave devices. The slave devices can only receive commands and data from the master device and make corresponding responses according to the corresponding commands. return data. The address of each slave device is arranged from low to high according to the connection sequence on the link.

3. The composition of the data transmission line

Taking the Ethernet physical layer as an example, a single data transmission line consists of three parts. The Ethernet physical layer chip at the forward sending end receives the standard data sent by the upper control chip, and converts the data into serial data for transmission. As shown in Figure 7, the forward data and reverse data are sent at the same time. When there is no fault in the device, only the forward data is used for data transmission. When encountering a disconnection or other faults that cannot communicate with the slave device, the reverse data plays the role of returning data to form a closed loop for troubleshooting use.

4. Signal encoding format

It is related to the physical layer transmission medium and protocol adopted, and currently supports Ethernet physical layer, 1394 physical layer, and USB physical layer. Take the Ethernet physical layer as an example: 4B-5B code system conversion is completed on the physical layer, and differential Manchester coded transmission is realized on category 5 twisted pair lines.

5. Basic structure of telegram

At the system interface, all data is transmitted in the form of data telegrams. The details are as follows.

5.1 Cyclic timing structure of transmission protocol

It can be seen from Figure 8 that a cycle of a protocol consists of 2 data transmissions with intervals: 962-byte data frame and 8-byte fast byte frame. Among them, the data frame function of 962 bytes includes the command sent by the master device to the slave device and the data returned by the slave device. The function of the 8-byte fast byte frame includes the synchronization enable of the command and data sent by the master device, that is, the information indicating the execution of the command.

The specific frame structure is described as follows:

962 (962=2+40×24) byte data frame starts with hexadecimal AA and BB, followed by 24 commands and data frames from slave devices, and each device allocates 40 bytes of space.

5.2 Slave device data structure

As shown in Figure 9, the slave device data allocates a total of 40 bytes of space, of which the first 16 bytes are written data from the master device, and the last 24 bytes are data returned to the master device. The data organization structure of the write data part is shown in Figure 10, and the data organization structure of the read part is shown in Figure 11.

6. Interface initialization and initial configuration of the slave device

After power on, the base address of all slave devices will be set to F8H. In order to avoid address conflicts, all slave devices are connected in a ring form, that is to say, the host computer can only access the first slave device before configuration.

The first step of configuration is to identify the slave device, the host computer accesses the first slave device, if the host computer reads the correct identification code. Then the host computer reassigns the base address to the slave device. After configuration, the slave device marks it in the signal transmitted to the next level, so that the next slave device can be configured according to this mark, and then complete the initial configuration of subsequent slave devices in turn.

7. Working sequence of CNC system protocol

As shown in Figure 8, a cycle timing structure, the first byte of the reception of the long data frame is the hexadecimal data AA and BB, and then the 0th byte of the 0th device (the device number starts from 0) , taking the No. 2 slave device (the physical address is 02) as an example, during the process of transferring and forwarding data from the slave device, the amount of data currently transferred is counted. When counting to 2*40+2=82 (52 HEX), start receiving (copying, but forwarding) data at the same time, when counting to 82+24=106 (6A HEX), stop receiving, and start filling data into the data stream, Fill while forwarding. When the count reaches 106+24=138, the self-filling and forwarding ends, and the transmission and forwarding of other device data continues until the end of the data flow.

Then the master device sends an 8-byte fast byte frame, and the slave device starts counting after receiving the start flag; after receiving the command data corresponding to its own position in this byte frame, it locks (enables) the long data frame and transmits it data and perform corresponding operations.

Both long data frame and fast frame operations end, completing a cycle.

8. Fault diagnosis and treatment

The protocol of this system defines special data bits for corresponding detection and processing of abnormal system power supply voltage, encoder disconnection, link disconnection, communication data error, servo device alarm, PLC alarm, etc.

According to the above description, this type of bus type numerical control system involved in the utility model can be summarized as follows:

The system includes a host computer 1 equipped with numerical control software, a full digital servo drive 3, a motor 4 and a programmable controller PLC. The host computer and the bus controller constitute the main equipment; the slave equipment includes servo drive and PLC. The servo driver sends a driving signal to the motor, and at the same time, the motor sends the feedback signal from the position detection device back to the servo driver through the line. The feature of the numerical control system of the present invention is that the master device is sequentially connected with multiple slave devices and finally connected back to the master device to form a closed loop, and the master device and the slave devices are connected through a link connected by a physical layer and a transmission medium. transfer data. During the transmission of information, the master device only sends master information to the first-level slave devices directly connected to it. This master information includes information related to all slave devices, such as command information, data information, and triggering a certain level of slave devices to execute command information. Moreover, the master information can only be transmitted to each slave device sequentially and one-way according to the sequence of the slave devices connected in series. Correspondingly, a slave device of a certain level receives and responds to the information related to it in the main information and gives feedback information; the feedback information of each slave device is forwarded back to the master through each slave device of the lower level one-way according to the sequence of the serial connection of the slave devices. equipment. The above data communication is only carried out between the master device and the slave device. During the transmission process, the slave device only receives and processes the master device's own commands and operation data, and only forwards the data of other slave devices without processing them. There is no separate data exchange between them.

A representative embodiment of the numerical control system based on the all-digital ring bus has been described above, and the main points of the utility model will be described in detail below.

In a nutshell, the improvement of the present utility model lies in the connection mode between the bus controller and the main board, that is, the bus controller 2 is a plug-in card structure (as shown in Figure 5), and the bus interface on the main board is connected with the main board based on the X86 system. The motherboard of the structure is connected and communicates with the X86CPU on the motherboard.

Since the main board of the upper computer adopts the general X86 architecture, the bus controller communicating with the lower computer must be designed as a plug-in card structure following the interface standard of the general main board. There are many ways to realize the communication between the plug-in structure and the motherboard. This design is suitable for many popular motherboard bus interfaces, such as PCI, PC104PLUS, and PCIE. It is best to choose the PCI interface. These buses have the characteristics of high speed and wide bandwidth, which can meet the needs of numerical control.

The bus controller can design the protocol as above, or SERCOS III, ProfiBus real-time serial field bus protocol according to the needs. The bus controller can complete interpolation data, actual position feedback data, CNC system state control data, CNC system state feedback data, CNC system configuration data, PLC Communication of control data and system status feedback data.

As for the above-mentioned X86CPU, the main function of its CPU is to perform calculation and logical operation, and its physical result includes a logical operation unit, a control unit and a storage unit. Some registers are included in the logic operation and control unit, and these registers are used for temporary storage of data during CPU processing data. The CPU communicates with the bridge chip on the motherboard, accesses the memory and devices on the external bus through the bridge chip, and exchanges data with them to complete various required functions. In the numerical control system, it mainly completes the operation and management of the operating system, and the operation, control and management of the numerical control software. In realizing the numerical control software of the numerical control system of the present invention, the CPU mainboard of the X86 system mainly completes the following control and management functions: display and management of man-machine interface, embedded PLC software program management, configuration system, parameter management, database management , NC program editing and interpretation, communication management; motion control, process control, logic control, task scheduling, axis control.

As shown in Figure 6, the bus controller generally includes the following modules:

1. PC bus control module 62

Mainly according to the main board bus type used, the interpolation data sent by the upper computer, the CNC system configuration data, the PLC control data and other data are analyzed and placed in the high-speed data buffer area according to the established format, waiting for the CNC bus protocol to be read; at the same time Read the system status actual position feedback data, CNC system status control data, CNC system status feedback data, and system status feedback data returned by the last bus interpolation cycle from the high-speed data buffer area, and feed these data back to the host through the main board bus interface Motion Control Software. In a preferred manner, the PCI interface is selected, so the PC bus control module can be called the PCI bus control module 62 .

2. CNC bus protocol analysis module 63

Mainly convert the format of the data read from the high-speed data buffer, configure it into the message of the real-time CNC bus, and send it to the lower slave device; and store the data fed back from the slave device in the cache according to the predetermined format area, waiting for the host computer bus to read.

3. Cache area 61

This part is mainly composed of high-speed memory, which is mainly used to exchange high-speed interpolation and PLC control data, as well as position data feedback, and other status information.

4. Physical layer control module 64

It mainly completes the control of the physical layer chip, converts the parallel real-time bus protocol data into high-speed real-time serial bus protocol data, and sends the data to the bus network; at the same time, it receives the high-speed real-time serial data fed back by the bus network and converts them Parallel data is sent to the CNC bus protocol analysis part.

5. Physical layer interface 68

It is mainly responsible for the mutual conversion, sending and receiving of parallel data to serial data. In the preferred mode, the physical layer of the controller is based on the 100M Ethernet physical layer, the transmission medium is a Category 5 twisted pair, the interface adopts the Ethernet physical layer interface RJ-45, and strict error control is designed.

6. CNC system enabling module 65

Its function is mainly to enhance the reliability and security of the system. In terms of reliability, it mainly considers whether the state of the numerical control system is normal and whether there is a failure. In terms of safety, it is mainly aimed at whether there are potential dangers for the operator of the CNC system. In addition to detecting the power supply of the master device and the slave device, it is also necessary to detect the operation of the software and hardware of the upper computer, as well as the conditions of each part of the slave device. Therefore, the information transmission method is: 1. Receive data from the slave device through the physical layer interface, the physical layer control module, and the bus protocol analysis module in sequence; 2. Receive data from the host computer through the PC bus control module. When both the host computer and the slave device pass the detection, the enabling module 65 directly sends a servo system enabling signal through the interface. At the same time, the module can also send a signal to cut off the power supply to the detected high-voltage equipment in the detection state. Therefore, this module is convenient for the designer of the machine tool to better improve the reliability and safety of the CNC machine tool system.

7. Machine data storage area 67

It mainly stores the latest configuration data of the machine tool.

The figure also shows that the necessary power management module 66 is a conventional module and will not be repeated here.

During work, the X86CPU on the main board sends data to the data buffer area through the PC bus control module; the bus protocol analysis module 63 accesses the data buffer area 61, obtains the data and converts it into an instruction conforming to the bus protocol, and then passes the physical layer control module 64 relies on the physical layer interface 68 to send data to the slave device.

However, the hardware implementation methods of the above-mentioned bus controller are various, as long as the functions of the above-mentioned modules can be complied with. The following schemes can be used: the combination of mainboard bus bridge and DSP, the combination of mainboard bus bridge and ARM, the combination of mainboard bus bridge and high-speed microcontroller, the combination of mainboard bus bridge and FPGA, the mainboard bus conversion chip and customized protocol The way of the controller, the way of using FPGA single chip to realize the conversion of the motherboard bus bridge and the numerical control bus protocol.

Based on real-time, flexible, high-speed and scalability considerations, due to the flexibility of FPGA programming, the bus controller of the present utility model has preferably selected a large-capacity on-chip integrated system FPGA to realize PCI bus control module 62, bus protocol analysis module 63, physical layer control Module 64 can be flexibly designed with bus protocol (custom), SERCOS III, and ProfiBus.Net bus protocol controllers without changing the hardware design through the programming of the hardware description language.

In addition, the machine tool keyboard is controlled as a standard PLC device. The PLC and the soft PLC management program of the CNC system software follow the bus supported by the CNC system, and realize real-time communication through the above-mentioned bus controller. Because the machine tool keyboard requires relatively high response speed, a special design has been made for this aspect on the bus controller used in the utility model, and a separate bus interface is reserved for the machine tool keyboard, and the interface is designed with the highest response and The priority of processing ensures the real-time nature of data interaction between the machine tool keyboard and the host computer. Therefore, as shown in FIG. 6 , the physical layer interface 68 at least includes an interface for sending data, an interface for returning data, and a physical layer interface for directly connecting the machine tool keyboard.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (7)

1, a kind of based on full digital ring bus formula general numerical control system, comprise main equipment and slave unit; Described main equipment comprises host computer (1) and the bus controller (2) that numerical control software is housed; Described slave unit comprises number bus formula servo-driver (3) and PLC, it is characterized in that, thereby described main equipment is connected in series 1-24 slave unit successively and connects back main equipment and constitutes a closed circuit, the link transmission data by being connected with transmission medium with Physical layer between described main equipment and the slave unit; In normal operation, data one-way transmission;

Wherein, described host computer (1) adopts the universal architecture mainboard, and described bus controller (2) is the card insert type structure, links to each other with mainboard based on the X86 architecture by the bus interface on the mainboard, and communicates by letter with X86CPU on the described mainboard.

2, according to claim 1ly it is characterized in that based on full digital ring bus formula general numerical control system the mainboard interface that is used for described bus controller (2) is PCI, PC104PLUS or PCIE interface.

3, according to claim 1ly it is characterized in that based on full digital ring bus formula general numerical control system the mainboard interface of described bus controller (2) is a pci interface.

4, according to claim 3ly it is characterized in that based on full digital ring bus formula general numerical control system,

Described bus controller (2) comprises power management module (66), PC bus control module, bus protocol analysis module (63), data buffer area (61), connects Physical layer control module (64), lathe data storage area (67) of physical layer interface (68);

Wherein, the X86CPU on the described mainboard delivers to described data buffer area (61) by described PC bus control module with data; Described bus protocol analysis module (63) is visited described data buffer area (61), obtains data and is translated into the instruction that meets bus protocol, relies on physical layer interface (68) that data are mail to slave unit by described Physical layer control module (64) again;

From the feedback information of slave unit, deliver to described data buffer area (61) by described physical layer interface (68), Physical layer control module (64), bus protocol analysis module (63) successively; Host computer is visited described data buffer area (61) by PC bus control module (62) and is obtained data;

Described lathe data storage area (67) is used to store the current up-to-date configuration data of lathe, by described PC bus control module (62) and host computer interaction data.

5, according to claim 4 based on full digital ring bus formula general numerical control system, it is characterized in that described pci bus control module (62), bus protocol analysis module (63), Physical layer control module (64) realize by on-chip integration system FPGA.

6, according to claim 5ly it is characterized in that based on full digital ring bus formula general numerical control system described physical layer interface (68) is the ethernet physical layer interface.

7, according to claim 6 based on full digital ring bus formula general numerical control system, it is characterized in that described physical layer interface (68) comprises interface, interface that data are returned and the ethernet physical layer interface that is used for directly being connected machine tool keyboard that is used for the data transmission.

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