JPH01296306A - Network constitution for plural numerical controller - Google Patents

Abstract

PURPOSE:To make a cell controller unnecessary by respectively providing man- machine control (MMC) sections to numerical control cells and, at the same time, giving a function which is able to communicate with other cells and another function which manages the exclusive right to a communication line to the MMC section of each cell. CONSTITUTION:This network for plural numerical controllers is constituted in such way that each of numerical control cells 11a-11d is constituted of a computer numerical value control (CNC) section, programmable machine control (PMC) section, and the MMC section which communicates data with the CNC and PMC sections. In addition, communication software CSF which communicates with the other cells through a high-speed communication line 12 is given to the MMC section of each cell and software LSF which manages the exclusive right to the communication 12 is given to the MMC section of the main numerical control cell 11a. Therefore, no cell controller is required.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a network configuration of a plurality of numerical control devices that can mutually exchange data via a high-speed communication line.

<Prior art> The numerical control device is a CNC section (computer numerical control section)
and a PMC section (programmable machine control section), and the CNC section performs predetermined numerical control according to NC data. Controls the movement of the machine and outputs commands for controlling machine elements to the PMC section, and the PMC section executes a predetermined sequence process based on the commands from the CNC section,
Operate each mechanical element of the machine tool based on the sequence processing results.

A plurality of such numerical control devices may be configured to be able to exchange data with each other. FIG. 3 is a network configuration diagram of a conventional multiple numerical control device, with la, lb, ・
. is a numerical control device, and 2 is a computer-configured cell controller. Each numerical control device 1a, lb,...
Each constitutes one cell and has a CNC section and a PMC section. Each CNC section and PMC section is configured to be able to exchange data with the cell controller 2,
In other words, each CNC section and PMC section is provided with a communication interface (hardware) and communication software.

The cell controller 2 controls data exchange between cells,
Data from a predetermined CNC section or PMC section (unit) is transferred to a unit in another cell.

<Problems to be Solved by the Invention> In such a conventional network configuration of multiple numerical control devices, a cell controller is required, and communication software must be created for each unit constituting the cell.
As a result, the network becomes expensive and complicated, and the burden on the cell controller increases, resulting in the problem that the performance of the network depends on the performance of the cell controller.

From the above, the purpose of the present invention is to eliminate the need for a cell controller, to use one piece of communication software for each cell, and to easily configure the hardware with only a high-speed communication line and a communication board (communication interface). The purpose of the present invention is to provide a network of multiple numerical control devices.

Means for Solving the Problems> FIG. 1 is a network configuration diagram of a plurality of numerical control devices according to the present invention.

11a to lid are numerical control devices (numerical control cells), 12
is a high-speed communication line, and CNC is a combination coater numerical control unit (
CNC section), PMC is a programmable machine control section (PMC section), MMC is a man-machine control section (MMcs), C8F is communication software, and LSF is communication line exclusive right management software.

Function> The CNC section, the PMC section, and the MMC section that exchanges data between the CNC section and the PMC section constitute one numerical control cell (11a to 11d), and the MMC section of each cell is provided with communication software C3F that communicates with other cells via the high-speed communication line 12, and the MMC section of the main numerical control cell 11a is provided with software LSF that manages the exclusive right of the high-speed communication line 12. Configure a network of control devices.

<Embodiment> FIG. 1 is a network configuration diagram of a plurality of numerical control devices according to the present invention.

11a to lid are numerical control devices (numerical control cells), 12
is a high-speed communication line such as HDLC or Ethernet.

In each numerical control device, CNC is a computer numerical control section (CNC section), PMC is a programmable machine control section (PMC section), and MMC is a computer-configured man-machine control section (MMC section).
It is.

The MMC department professionally performs the man-machine interface between the CNC machine tool and the operator. In this MMC section, INF is a high-speed communication interface composed of a buffer section, a serial/parallel/parallel converter, a transmitting/receiving section, etc., and C8F is communication software. It is now possible to exchange data with other cells. Furthermore, all MM
The C section is provided with the communication software C8F, and the MMC section of the main numerical control cell lla is further provided with management software LSF for managing the exclusive right of the communication line.

The MMC unit is capable of multitask processing, and can execute the following functions (il to (V)) using the communication software and software not shown.

In other words, the MMC section (il CN C section, data exchange function between the PMC section,
(11) Performs a data communication function with other cells, (2) a high-speed communication line exclusive right management function, a 6ψ man-machine interface function, and an MNC data automatic creation function.

The data exchange function (i) is a function of reading predetermined data, files, and signals in the CNC section or PMC section, or transferring predetermined data to the CNC section or PMC section.

FIG. 2 is a hardware configuration diagram for mutually transmitting and receiving data among the CNC section, PMC section, and MMC section. Reference numeral 13 denotes a data exchange control section, which includes a shared RAM 13a and a bus control section 13b.

For data exchange, the data sending side writes data and commands to the shared RAM 13a via the bus control unit 13b.
This is done by the recipient and the recipient who reads it. or,
(iil's data communication function is based on communication software C3F.
This is a function of transmitting data to a destination cell according to a high-speed communication interface and receiving data according to a high-speed communication interface. Furthermore, the communication line exclusive right management function of (ill) is controlled by the main numerical control cell l.
This is carried out by the MMC unit of LA based on the management software LSF, which generates a queue to determine which MMC unit will occupy the communication line, taking into account the priority order or the order in which data transmission requests occur, and Open the communication lines in order and execute data communication.

The overall operation of FIG. 1 will be explained below.

The MMC unit of the main numerical control 7/1/lla checks whether there is a data transfer request from each MMC unit, including itself, based on the communication line management software LSF, and if so, considers the order of request occurrence and priority. A queue is created and a communication line is opened to the MMC section at the head of the queue. Note that the first MMC section is removed from the queue.

The MMC section, which is permitted to use the line, transmits data indicating the destination to the expressway line 12 via the interface INF under the control of the communication software C3F.

The MMC section of the other cell takes in the destination data on the communication line 12 and checks whether it is addressed to itself, and if it is addressed to itself, it enters a data reception standby state.

On the other hand, the MMC on the data sending side thereafter sequentially sends data to the other party via the interface INF and the high-speed communication line 12, and the MMC section of the other party receives the transmitted data until "1 end" is detected. .

As described above, when the data exchange between cells is completed (the end of data is detected), the main numerical control cell lla
The MMC section checks whether there is a data transfer request from each MMC section, updates the communication line occupancy queue based on the result, and repeats the above process.

With the above, for example, the data request command and data name (
If the file name) etc. is transferred to another cell, the MMC section of the other cell reads the requested data or file from the PMC section or CNC section and transmits it to the requesting cell according to the above procedure. In addition, the following can be considered as a specific example of communication between each cell. In other words, (al file server communication... programs and their attributes,
Transfer and deletion of tool data, tool life data, etc., synchronous communication between fbl cells (real-time processing)... operation between seven nodes (for example, when a simultaneous 4-axis lathe is operated synchronously with two numerical control cells), Communication for synchronizing operations in application programs. That is, communication when starting, terminating, conditionally stopping, and restarting operations between cells.

te+Question/Response Communication: Communication for asking and answering questions between cells. For example, inquiries about processing status and responses.

fd) Remote control communication (batch processing)...Communication when performing remote control on the same floor as the cell.

<Effects of the Invention> According to the present invention, the CNC section, the PMC section, and the MM that exchanges data between the CNC section and the PMC section.
C part constitutes one cell, and the MMC of each cell
Since each MMC unit has a function to communicate with other cells via a high-speed communication line, and at least one MMC unit has a function to manage exclusive rights to the communication line, there is no need for a cell controller, and communication software is required. One device can be used in common for each cell, and the hardware can be easily configured using only high-speed communication lines and communication interfaces.

[Brief explanation of the drawing]

FIG. 1 is a network configuration diagram of a multiple numerical control device according to the present invention, FIG. 2 is an explanatory diagram of a data exchange control section that controls mutual data exchange between the CNC section, PMC section, and MMC section, and FIG. 3 is a conventional diagram. FIG. 2 is a network configuration diagram of a plurality of numerical control devices. 11a-lid... Numerical control unit (numerical control cell), 12
・・High-speed communication line, CNC・・Computer numerical control section (CNC section), PM
C...Programmable machine control section (P
MC section), MMC...Man-machine control 1m (MMC
Department), 08F... Communication software, LSF... Exclusive rights management software Patent applicant Chiki Saito, Patent attorney, agent for FANUC Co., Ltd. Figure 2 Figure 3

Claims (1)

[Claims] One numerical control cell is composed of a CNC section, a PMC section, and an MMC section that exchanges data between the CNC section and PMC section, and the MMC section of each cell is connected to another numerical control cell. A network configuration of a plurality of numerical control devices, characterized in that it has a function of communicating via a high-speed communication line, and at least one MMC unit has a function of managing exclusive rights to the communication line.