JPH0784629A - Numerical controller and fa system - Google Patents

Abstract

PURPOSE:To provide a numerical controller capable of constructing a simple FA system. CONSTITUTION:A CNC control circuit 1 and a PMC control circuit 22 are connected to one terminal of a server control circuit 31 through a CNC control bus 21 and the other terminal of the circuit 31 is connected to a server control bus 40. Thereby, the circuits 1, 22 can use the bus 21 independently of the bus 40, and even when the circuit 31 receives NC data from a host computer through a main line network, can execute processing. Since the circuit 31 is built in, a display device, a keyboard, etc., which are independently prepared in each conventional numerical controller can be shared. In addition, a conventional numerical controller including no server control circuit can be connected through a sub-network circuit 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device and an FA system, and in particular, an FA system connected to a host computer.
The present invention relates to a numerical controller suitable for constructing a system and an FA system using the numerical controller.

[0002]

2. Description of the Related Art In order to operate a numerically controlled machine tool unattended, an FA system constructed by a numerical controller and a host computer has been widely adopted. F like this
In the system A, the host computer is connected to the main network, the server is connected to the main network, and the numerical controller is connected to the server. Then, NC data such as a machining program is transferred to each numerical control device via the server.

FIG. 5 is a schematic block diagram of a conventional FA system. The host computer 60 is connected to the trunk network 61, and the trunk network 61 has a server 70.
Are connected. The server 70 has a hard disk 71 as an auxiliary storage device. Numerical control devices 80a, 80b, 80c are connected to the server 70.

The NC data sent from the host computer 60 is temporarily stored in the hard disk 71 of the server 70 via the main network 61, and the server 70 causes the numerical control devices 80a, 80b, 80c to be stored.
Sent to.

[0005]

However, such an F
The A system always requires a server, which makes the system complicated.

In general, the server also has a display, a keyboard, etc., and overlaps with the display, keyboard, etc. of the numerical controller. Further, in general, the numerical control device has an interface connected to a server shared with an internal bus, and when NC data is transferred from the server, the internal bus is crowded and processing cannot be executed at high speed during the transfer of NC data. There was a problem.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a numerical control device capable of constructing a simple FA system. Another object of the present invention is to provide a numerical control device capable of constructing an FA system that omits the input / output devices common to the numerical control device.

Still another object of the present invention is to provide a numerical controller capable of simultaneous transfer of NC data and internal processing. Another object of the present invention is to provide a simple FA system.

Still another object of the present invention is to provide an FA system that simultaneously includes a numerical control device with a built-in server and a conventional numerical control device that does not include a server.

[0010]

According to the present invention, in order to solve the above-mentioned problems, in a numerical controller which is connected to a host computer and constitutes an FA system, a server control circuit having an auxiliary storage unit coupled thereto, and the server control. A numerical control device comprising a CNC control circuit connected to one of the circuits via a CNC control bus, and a main network circuit connected to the other of the server control circuits via a server control bus. , Provided.

[0011]

The CNC control circuit is connected to the server control circuit via the CNC control bus, and the main network circuit is connected to the server control circuit via the server control bus. Therefore, the CNC control circuit can perform processing using the CNC control bus even when the server control circuit receives NC data from the host computer via the main network.

Further, by incorporating the server control circuit, the display and the input / output device, which are independently owned, are shared.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a numerical controller according to the present invention. The numerical controller 10 includes a server control circuit 31.
The CNC control bus 21 and the server control bus 40 are connected to each other. That is, the CNC control bus 21 and the server control bus 40 are separated. On the CNC control bus 21,
The CNC control circuit 1 and the PMC control circuit 22 are connected. Although not shown, the CNC control bus 21
An axis control circuit for controlling the servo motor, a graphic control circuit for generating display data of the display device, and the like are connected to the. The details will be described later.

A hard disk 35, a sub network circuit 32, and a main network circuit 33 are connected to the server control bus 40. The server control circuit 31 receives NC data from a host computer, which will be described later, via the main network circuit 33 and stores it in the hard disk 35. Then, the NC data is transferred to the CNC control circuit 1 via the CNC control bus 21.

The CNC control bus 21 is a server control bus 40.
Therefore, the CNC control circuit 1 and the PMC control circuit 22 can perform processing even while the server control circuit 31 is receiving NC data from the host computer.
Then, the CNC control circuit 1 or the PMC control circuit 22
Server control circuit 31 by adjusting the timing of processing such as
The NC data can be transferred, and the processing of the CNC control circuit 1 and the like can be performed at a higher speed.

2 and 3 are block diagrams of the hardware of the numerical controller according to the present invention. In FIG. 2, a processor 11 is a central processor for controlling the entire numerical controller (CNC), and via a CNC control bus 21,
The system program stored in the ROM 12 is read out, and the control of the entire numerical controller (CNC) is executed according to this system program. The RAM 13 stores temporary calculation data, display data, and the like. RAM1
An SRAM or the like is used for 3. The non-volatile memory 14 stores NC data and various parameters. The non-volatile memory is backed up by a battery (not shown), and even if the power of the numerical control device (CNC) is turned off, those data are retained as they are.

The graphic control circuit 15 converts digital data such as the current position of each axis, alarms, parameters and image data into an image signal and outputs it. This image signal is sent to the display device 16 of the CRT / MDI unit 25 and displayed. A software key 23 is provided below the display device 16 and is used as a key that performs a function corresponding to the display on the display screen. Also, the keyboard 17
You can enter the required data from.

The axis control circuit 18 receives the movement command for each axis from the processor 11 and outputs the command for each axis to the servo amplifier 19.
Output to. Servo amplifier 19 Upon receiving this movement command,
The machine tool 20 is operated by driving the servo motor of each axis. Although only one axis control circuit 18 and one servo amplifier 19 are shown, there are actually as many axes as there are servo motors.

One of the server control circuits 31 is connected to the CNC control bus 21 and the other is connected to the server control bus 40. The circuit connected to the server control bus 40 will be described in FIG.

A PMC (Programmable Machine Controller) control circuit 22 is built in the CNC 10 and controls the machine with a sequence program created in a ladder format. That is, the M function instructed by the machining program,
According to the S function and the T function, these are converted into necessary signals on the machine side by the sequence program and output to the machine side. This output signal drives a magnet or the like on the machine side to operate a hydraulic valve, a pneumatic valve, an electric actuator or the like. Further, it receives a signal from a limit switch on the machine side, a switch on the machine operation panel, etc., performs necessary processing, and passes it to the processor 11.

In FIG. 3, the server control circuit 31 has the other end connected to the server control bus 40, and the server control bus 40
A sub network circuit 32, a main network circuit 33, and an I / O circuit 34 are connected to the. The sub-network circuit 32 is connected to a conventional numerical control device having no built-in server control circuit as described later. A host computer is connected to the trunk network circuit 33 via a trunk network as described later. I /
A hard disk 35 is connected to the O circuit 34,
The hard disk 35 stores the NC data sent from the host computer. Further, the I / O circuit 34
The floppy disk 36, printer 37, and cassette tape 38 are connected to the I / O device.

The server control circuit 31 is connected to the CNC control bus 21, and the display device 16 can be used to perform a necessary display. In addition, the keyboard 17
Alternatively, the software key 23 can be used to input data to the server control circuit 31. That is, the server control circuit 31 and the CNC side (including PMC) share the display device 16, the software key 23, the keyboard 17, and the like.

FIG. 4 is a schematic diagram showing the use of the numerical controller of the present invention for F
It is a block diagram at the time of constructing A system. The host computer 50 is connected to the trunk network 51. Ethernet (Eth
It is possible to use the standard of the Internet). To the main network 51, the numerical control devices (CNC) 10a and 10b having the server control circuit described above are connected. Then, the NC data is transferred from the host computer 50 via the trunk network 51. on the other hand,
The operation state of the CNC is transferred to the host computer 50 from the CNCs 10a and 10b.

Further, the numerical controller 10b includes a conventional numerical controller (CNC) 80a which does not include a server control circuit in the sub-network circuit 32 described above.
80b is connected. Then, the NC data from the host computer 50 is sent by the server control circuit of the numerical controller 10b to the conventional numerical controllers 80a, 80b.
You can also transfer to.

As described above, by using the numerical control devices 10a and 10b having the server control circuit built therein, the F without the server is used.
A system can be constructed. Further, it is possible to construct an FA system including the conventional numerical control devices 80a and 80b.

[0026]

As described above, according to the present invention, since the numerical control device has the server control circuit built therein, the FA system can be constructed without the server.

Further, by incorporating the server control circuit, the numerical control device and the server control circuit can share the display device, the keyboard and the like. Furthermore, since the CNC control bus and the server control bus are separated by the server control circuit, the CNC side can continue the processing even during the transfer of NC data, and the processing speed can be increased.

Since the sub-network circuit is connected to the server control circuit, the FA system including the conventional numerical control device can be constructed by connecting the conventional numerical control device to the sub-network circuit. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a numerical controller according to the present invention.

FIG. 2 is a block diagram of hardware of the numerical controller according to the present invention.

FIG. 3 is a more detailed hardware block diagram of the numerical controller of the present invention.

FIG. 4 is a block diagram when an FA system is constructed using the numerical control device of the present invention.

FIG. 5 is a schematic block diagram of a conventional FA system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CNC control circuit 10 Numerical control device 21 CNC control bus 22 PMC control circuit 31 Server control circuit 32 Sub network circuit 33 Main network circuit 35 Hard disk 40 Server control bus 50 Host computer

Claims (4)

[Claims] 1. A numerical control device which is connected to a host computer and constitutes an FA system, wherein a server control circuit coupled with an auxiliary storage device, and a CNC control connected to one of the server control circuits via a CNC control bus. A numerical controller comprising: a circuit; and a trunk network circuit connected to the other of the server control circuits via a server control bus. 2. The numerical controller according to claim 1, further comprising a sub-network circuit connected to the server control bus. 3. An FA system comprising a host computer and a numerical controller, a host computer, a trunk network connected to the host computer, a trunk network circuit connected to the trunk network, and a network circuit connected to the network circuit, A server control circuit coupled with an auxiliary storage device and a CN connected to the server control circuit.
An FA system comprising: a numerical control device having a CNC control circuit connected via a C control bus. 4. The numerical control device has a sub-network circuit connected to the server control circuit, and a conventional numerical control device having no built-in server control circuit is connected to the sub-network circuit. The FA system according to claim 3.