KR19980027945A - Battery fixing structure of car - Google Patents

Abstract

The present invention relates to a communication method and a device between numerical control devices in a DC system composed of a plurality of numerical control devices individually connected to each other via a single host computer and a communication line. The communication method comprises the steps of generating a predetermined command signal for control of any other numerical control device from one numerical control device and transmitting it to the host computer, wherein the host computer generates the other numerical control device according to the command signal. Controlling the step. Thereby, a communication method between numerical control devices in a decisive system is provided.

Description

Communication Method and Communication Device between Numerical Control Units in DC System

The present invention relates to a communication method and apparatus between numerical control devices in a direct numerical control (DNC) system.

In the DC system, the Numerical Control Machine (NC Machine) equipped with the processing equipment and the host computer supplying the program data are connected one-to-one, and the host computer transmits the program data to the numerical controller. It is a system that performs machining, but is especially useful when large memory such as CAD / CAM (Computer Aided Design / Computer Aided Manufacturing) data is needed.

In general, the numerical control system, which consists of the numerical control device (hereinafter referred to as NC device) and the host computer that supplies the part program data, can be divided into the simple type, the distributed type, and the direct type. As shown in Fig. 3, the simple numerical control system is a system in which one computer 40 and one NC device 46 exchange processing program data by serial communication. However, there is a disadvantage in that there is no scalability when the NC device is extended. The distributed numerical control system, as shown in FIG. 4, connects a LAN between a host computer 50 for supplying numerical control data, a management computer 60 for managing the system, and facilities for a numerical control device. It is a system that transmits machining program data from (52,53, 54,55) to NC devices (56, 57, 58, 59) and processes it. This is useful if

As shown in Fig. 1, a direct-current numerical control system, as shown in Fig. 1, has a host computer 10 for supplying machining program data and NC devices 16, 17, 18, and 19 connected one-to-one by serial communication. As a system, the number of NC devices that can be connected is limited, but it is easy to build and economical, making it suitable for small shops.

By the way, in the conventional DC system, only a method of transmitting the processing program data from the host computer 10 to each of the NC devices 16, 17, 18, and 19 exists, and the NC devices 16, 17, and 18 are directly applied in the field. , 19) to receive the necessary information from the host computer 10 or to transmit and receive data to and from other NC devices 16, 17, 18 and 19. Accordingly, in order to obtain necessary information or data, the user has to move to a place where the host computer 10 is installed. In addition, in order to solve this problem, it is not only economically burdensome to replace a decentralized system, but there is a problem that more equipment is installed in a small workplace requiring a few NC devices.

Accordingly, it is an object of the present invention to provide a communication method and apparatus between NC devices in a decentralized system to solve the above problems.

1 is a schematic diagram showing a configuration of a diene system;

2 is a flowchart illustrating a communication method between numerical control devices according to an embodiment of the present invention;

3 is a schematic view showing the configuration of a simplified numerical control system;

4 is a schematic diagram showing the configuration of a distributed numerical control system.

The above object is, according to the present invention, a communication method between a plurality of numerical control devices, each individually connected via a single host computer and a communication line, to control the control of any other numerical control device from one numerical control device. Generating a predetermined command signal for the host computer and transmitting the predetermined command signal to the host computer; and controlling the other numerical control device according to the command signal.

Here, the controlling of the other numerical control device may include reading data of another numerical control device due to a predetermined data read command requested by one numerical control device, and transmitting the data to one numerical control device. And reading the data of one numerical control device due to a predetermined data write command requested by one numerical control device, and transmitting the data to another numerical control device. It is desirable to include. The command signal is preferably configured to include an operation code, a numerical control device number, and a part program number.

In addition, according to another field of the present invention, in a DC system including a plurality of numerical control devices connected one-to-one through a communication line with a host computer, it is provided in one numerical control device to control any other numerical control device. A command system for generating a predetermined command signal, a transmission unit for transmitting the command signal to a computer, and a control unit for controlling the other numerical control unit according to the command signal is provided do.

Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the host system 10 and the NC devices 16, 17, 18, and 19 are connected in a one-to-one manner by serial communication. . The host computer 10 is responsible for the transmission and management of the machining program data, and the NC devices 16, 17, 18, and 19 control the connected machining facilities according to the transferred machining program data.

In this configuration, the communication method between the NC devices according to the present invention is the same as the flowchart shown in FIG. First, when a user generates a command through the command signal generation unit installed in the NC device, the transmission unit in the NC device transmits the command to the host computer (step 21). In this case, the command transmitted from the transmission unit of the NC device has a format as shown in Table 1.

OP code # NCM Program Number

Here, OP code designates an operation to be performed as an operation code, # NCM means a number set in each NC device, Program Number means a part program number.

When the command is received from the command sending NC device to the host computer, the control unit installed in the host computer interprets the command string (step 22), and performs the necessary operation according to the command. If the command is a read command (step 23), the host computer sends a read command to the NC device specified in the command (step 24), and the NC device receiving the command reads the part program data and sends it to the host computer. do. The host computer receives this part program data (step 25), sends it to the command sending NC device (step 26), and the command sending NC device displays the received part program data on the screen and stores it if necessary. This process makes it possible to read the part program data from another NC device from the command sending NC device.

If the command is a write command (step 28), the host computer receives the part program data from the command sending NC device (step 29), and then transfers the part program data to the NC device specified in the command (step 30). If the command is a list command (step 32), the host computer sends a list command to the NC device specified in the command (step 33), and the NC device receiving the command transmits the part program list to the host computer. This is received by the host computer (step 34). The host computer transmits the received list to the command sending NC device (step 35). Accordingly, it is possible to transfer the part program data from the command sending NC device to another NC device and to query the list of part programs in other NC devices.

The following will exemplify the commands applied to the present embodiment.

The Rd # 2 N0010 command reads a part program with the number N0010 from the NC device designated by # 2, and displays it on the screen of the NC device requesting the read command. The user can store the received part program, and the stored part program can be used if necessary.

The Wr # 2 N0010 command reads the part program data from the NC device that has sent the write command, transfers it to the NC device specified by # 2, and stores it under the program number of N0010.

Flist # 1 The N7000 command reads a list of files for a part program in the NC device specified by # 1, and displays them on the screen of the NC device that requested the command with the program number of the N7000. It can be used when the user inquires about the part program data necessary for the NC device before sending and receiving the part program data.

In the above example, only the read command, the write command, and the list command have been described. However, the present invention is not limited to such a command. However, by adding a new command, the user can inquire the shape of the workpiece in the field, or inquire and edit the part program data. It is also possible to construct a system having various functions.

As described above, according to the present invention, there is provided a communication method and apparatus capable of transmitting and receiving a part program data between respective NC devices of a decisive system.

Claims (5)

In the communication method between a single host computer and a plurality of numerical control devices individually connected through a communication line, Generating a predetermined command signal for control of any other numerical control device from one numerical control device and transmitting it to the host computer; And controlling, by the host computer, the other numerical control device in accordance with the command signal. The method of claim 1, The control of the other numerical control device Reading data of the other numerical control device due to a predetermined data read command requested by the one numerical control device; Transmitting said data to said one numerical control device. The method of claim 1, The control of the other numerical control device Reading data of said one numerical control device due to a predetermined data write command requested by said one numerical control device; And transmitting the data to the another numerical control device. The method of claim 1, And said command signal comprises an operation code, a numerical control device number, and a part program number. In the DCN system including a plurality of numerical control devices connected one-to-one through a communication line with a host computer, A command signal generation unit installed in one numerical control device and generating a predetermined command signal for control of any other numerical control device; A transmission unit for transmitting the command signal to the host computer; And a control unit for controlling the other numerical control unit according to the command signal.