JPH05134736A - Data transferring method - Google Patents

Abstract

PURPOSE:To connect a host computer to a numerical controller with the communication line of one line and to simultaneously operate plural machine tools by adding the machine number of the machine tool in a data block to be transferred and transmitting/receiving the data block by time division at every machine number. CONSTITUTION:When the machine tools 5a and 5b are operated, a signal for requesting work data of the machine tool 5a and the machine tool 5b is transmitted from the numerical controller to the host computer 1 by time division. The host computer 1 transfers prescribed packets to the numerical controller 2. The numerical controller 2 which receives the packets recognizes the MCN (machine number) of the packets so as to permit memory areas 4a and 4b corresponding to the machine number designated by MCN to respectively store the packets. Then, the numerical controller 2 calls work condition which is stored in the respective memory areas 4a and 4b so as to control the machine tools 5a and 5b corresponding to the memory areas 4a and 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer method in a machining system in which a host computer storing a plurality of machining data and a numerical controller for controlling a plurality of machine tools are connected by a single communication line. Is.

[0002]

2. Description of the Related Art When a host computer storing a plurality of machining data and a numerical controller for controlling a plurality of machine tools are connected via a communication line and a plurality of machine tools are simultaneously operated, the host computer and the numerical control are used. As many communication lines as the number of machine tools were required to connect to the equipment.

[0003]

Therefore, the number of transmission / reception circuits arranged in the host computer and the numerical control device is increased, and the device and wiring are complicated.

In view of the above circumstances, an object of the present invention is to provide a data transfer method in which a host computer and a numerical controller are connected by a single communication line so that a plurality of machine tools can be operated simultaneously. To provide.

[0005]

In order to achieve the above object, in the present invention, a machine number of a machine tool is added to a data block to be transferred so that the data block can be discriminated.

[0006]

[Operation] Then, according to the request from the numerical control device,
By transmitting and receiving the data block for each machine number in a time division manner, it becomes possible to transmit and receive the machining data of a plurality of machine tools through one communication line.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
It will be explained based on. FIG. 1 shows the configuration of a system to which the present invention is applied. In FIG. 1, 1 is a host computer. Reference numeral 2 is a numerical controller, which is connected to the host computer 1 via a communication line 3. This numerical control device 2
Has a plurality of memory areas 4 for temporarily storing processed data.
There are a to 4n. Machine tools 5a to 5n are controlled by the numerical controller 2.

FIG. 2 shows an example of the structure of a data block (hereinafter referred to as a packet) transferred in the present invention. In FIG. 2, STX represents the start of a packet. L
EN is the packet length, MCN is the machine number, COM is the command code indicating the data division, PNC is the packet number, DAT is the transfer data, SUM is the sum data, and ET.
X indicates the end of the packet.

When operating the machine tools 5a and 5b with the above-mentioned configuration, the numerical control device 2 operates the host computer 1
As shown in FIG. 3, signals 6a and 6b requesting machining data of the machine tools 5a and 5b are transmitted in time division. Then, the host computer 1 to the numerical controller 2
The packets 7a and 7b having the configuration shown in FIG. Numerical control device 2 that receives packets 7a, 7b
Looks at the MCN of the packets 7a, 7b, and in the memory areas 4a, 4b corresponding to the machine number specified by the MCN,
The packets 7a and 7b are stored respectively. Then, the numerical control device 2 calls the machining conditions stored in the memory areas 4a and 4b, and controls the machine tools 5a and 5b corresponding to the memory areas 4a and 4b.

At this time, although the amount of processing data to be stored is limited by the size of the memory areas 4a and 4b, an auxiliary storage device such as a hard disk 8 is provided in the numerical controller 2 to receive it from the host computer 1. The limitation can be avoided by temporarily storing the processed data.

As shown in FIG. 2, since the packet is provided with the packet number PCN, when a communication error or the like occurs, a resend request can be made with this packet number PCN.

As described above, the host computer storing a plurality of machining data and the numerical controller for controlling a plurality of machine tools are connected by one communication line to transfer the machining data of a plurality of machine tools. be able to.

[0013]

As described above, according to the present invention, the machine number of the machine tool is added to the data block to be transferred, and the data block is transmitted and received for each machine number in a time division manner. Therefore, the host computer that stores a plurality of machining data and the numerical control device that controls a plurality of machine tools can be connected by a single communication line, and the machining data of each machine tool can be transferred.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a processing system embodying the present invention.

FIG. 2 is a configuration diagram showing an example of a packet used in the present invention.

FIG. 3 is a time chart diagram showing communication states of a host computer and a numerical control device that controls a plurality of machine tools.

[Explanation of symbols]

 1 host computer, 2 numerical controller, MCN machine number.

Claims (1)

[Claims] 1. A data transfer method in a processing system in which a host computer storing a plurality of machining data and a numerical control device for controlling a plurality of machine tools are connected by a single communication line, and the data to be transferred. A data transfer method characterized in that a machine number of a machine tool is added to a block and a data block is transmitted and received for each machine number in a time division manner.