JPH0973310A - Unit and system for numerical control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the complexity of a cable between constituent elements by connecting respective constituent elements in the numerical controller. SOLUTION: A numerical control part 10, axis control parts 20 and 30, and a screen control part 40 are connected by a network 50. Then the numerical control part 10 consists of a numerical control means 11 which controls the whole numerical control unit, a PMC control means 12 which controls a machine tool, and a 1st network control part 13 which controls the network 50. Further, the axis control parts 20 and 30 consist of axis control means 21 and 31 which control a servo driving system and 2nd network control parts 22 and 32 which control the network 50. The screen control part 40 consists of a screen control means 41. which controls an input/output device such as a CRT and an MDI and a 3rd network control part 42 which controls the network 50. Consequently, data can be sent and received among the respective constituent elements through the network.

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 more particularly to a numerical control device and a numerical control system in which each component is distributed.

[0002]

2. Description of the Related Art Various control devices of a numerical control device, additional devices, etc. are housed in one numerical control device, and all functions are integrated in one place. For this reason all cables were concentrated in one place. Further, when performing a machining operation using a plurality of numerical control devices, since the input / output devices such as CRT / MDI are also housed in each numerical control device, the CRT / MDI is installed at the place where the numerical control devices are arranged. Was being operated.

[0003]

However, if all the cables are concentrated in a specific place, it is complicated and it is not preferable in terms of wiring. Further, when a plurality of numerical control devices are used for machining work, unless an input / output device such as a CRT / MDI is arranged at one location, the operability is poor and the overall management is difficult.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a numerical control device and a numerical control system that reduce the complexity of a cable. Still another object of the present invention is to provide a numerical control system that enables centralized management.

[0005]

According to the present invention, in order to solve the above-mentioned problems, in a numerical controller in which each component is distributed, a network, a first network control unit for controlling the network, and the numerical control. A numerical control unit including a numerical control unit that controls the entire apparatus and a PMC control unit that controls the machine tool, a second network control unit that controls the network, and an axis control unit that controls the servo drive system. There is provided a numerical control device having a plurality of axis control units including the same, a third network control unit for controlling the network, and a screen control unit including a screen control unit for controlling the input / output device. .

Here, the numerical controller controls the entire numerical controller through the network. The axis control unit controls the servo drive system via the network. The screen control unit controls an input / output device such as a CRT / MDI via a network.

Further, in a numerical control system in which a plurality of numerical control devices are distributed, a network, a first network control section for controlling the network, a numerical control means for controlling the entire numerical control device, and a machine tool. A plurality of axis control units including a numerical control unit including a PMC control unit for controlling the above, a second network control unit for controlling the network, and a plurality of axis control units for controlling the servo drive system. There is provided a numerical control system having a group, a plurality of third network control units for controlling the network, and a screen control collecting unit including a plurality of screen control means for controlling an input / output device. .

Here, the plurality of numerical control units control the entire numerical control device in each group via the network. The plurality of axis control units control the servo drive system in each group via the network. The screen control collection unit uses the CRT / MDI in each group via the network.
Control input / output devices such as.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of the present invention. The numerical control device includes a numerical control unit 10 and axis control units 20, 30.
And a screen control unit 40, and these respective constituent elements are connected by a network 50.

The numerical control unit 10 includes a numerical control means 11 for controlling the entire numerical control device and a PMC for controlling a machine tool.
The control unit 12 and the first network control unit 13 that controls the network 50 are included.

The axis control units 20 and 30 are composed of axis control means 21 and 31 for controlling the servo drive system and second network control units 22 and 32 for controlling the network 50. In order to simplify the explanation here, the axis control unit is 2
Although only one is shown, actually, a required number of axis control units are connected to the network 50 according to the transfer capability of the network.

The screen controller 40 is composed of a screen controller 41 for controlling an input / output device such as a CRT / MDI, and a third network controller 42 for controlling the network 50. Therefore, by adopting such a configuration, data transmission / reception between the respective components is performed via the network. In this way, each component is connected by the network and distributed in the proper place. Therefore, the cables are not concentrated in one place, and the complexity of the cables can be reduced. For example, by disposing the axis control unit near the servo motor, the cable length between the axis control unit and the servo motor can be minimized, and the complexity of the cable can be reduced.

Next, a numerical control system in which a plurality of numerical control devices are distributed will be described. FIG. 2 is a conceptual diagram of the numerical control system. This numerical control system is divided into three independent working groups. The group 1 includes the numerical controller 100 and the axis controller 110 that receives the command. Numerical control unit 20 in group 2
0 and axis control units 210 and 220 that receive the command are included. The group 3 includes the numerical controller 300 and the axis controller 310 that receives the command. Further, the screen control units corresponding to the respective numerical control units 100, 200 and 300 are collected in one place as a screen control collecting unit 400. These three groups and the screen control collection unit 4
00 are connected by one network 500 and are distributed.

Although the number of groups and the number of constituent elements are set as described above for the sake of simplicity, in practice, the required number of groups and the number of constituent elements are set according to the transfer capability of the network. And are connected to the network 500. The combination of the numerical controller and the axis controller can be set arbitrarily. For example, although the numerical control unit 100 and the axis control unit 110 are in one group in the above description, the axis control unit 310 may receive a command from the numerical control unit 100. The combination format can be set arbitrarily by the program.

The numerical control units 100, 200 and 300 are
Numerical control means 10 for controlling each numerical control device
1, 201 and 301, PMC control means 102, 202 and 302 for controlling a machine tool, and a network 50
It is composed of first network control units 103, 203 and 303 for controlling 0.

Axis control units 110, 210, 220 and 31
0 is axis control means 111, 2 for controlling the servo drive system
11, 2221, and 311 and second network control units 112, 212, 222, and 312 that control the network 500.

The screen control collecting section 400 is composed of a screen control section corresponding to each numerical control section. That is, the screen control unit 401, which is the screen control unit of the numerical control unit 100, and the third
Network control unit 404, screen control unit 402 and third network control unit 405 which are screen control units of numerical control unit 200, and screen control unit 403 and third network control unit 406 which are screen control units of numerical control unit 300.
It is composed of Also, the screen control means 401, 402
Reference numerals 403 control input / output devices such as CRT / MDI. Third network control units 404, 405 and 406
Controls the network 500.

Therefore, by adopting such a configuration, the screen control section can be arranged at one place. Thus, a plurality of numerical control devices connected by the network can be operated at one place, which enables centralized management. Further, in the numerical control device and the numerical control system described above, the numerical control means and the PMC control means are present in the numerical control section, but they can be further distributed.

Next, a case where Ethernet, which is a general-purpose LAN, is applied to the network will be described. Here, the numerical control device and the numerical control system described above are basically the same with respect to the network interface and the data transmission format. Therefore, in order to simplify the description, the configuration and operation in the case of the numerical control device in which the constituent elements in one numerical control device are connected by the Ethernet LAN will be described.

FIG. 3 is a detailed general view of the numerical control device when the network is constructed by Ethernet which is a general-purpose LAN. The numerical control device includes a numerical control unit 10, axis control units 20 and 30, and a screen control unit 40, and these components are connected by an Ethernet LAN 60.

The numerical control means 11 in the numerical control unit 10 is
Controls the entire numerical control device. A DI / DO 15 is connected to the PMC control means 12 and controls interfaces such as the high-voltage circuit 16 and the machine side operation panel 17. The Ethernet controller 14 corresponds to the first network control unit 13 of FIG. 1 and includes an encoder / decoder 14a and a transceiver 14b. The encoder / decoder 14a encodes the packet to be transmitted. Also,
Decode the received packet. The transceiver 14b has a driver / receiver function for transmitting and receiving packets, and a communication control function for checking the existence of packets on the network and monitoring packet collisions. Further, since the functions of the encoder / decoder and the transceiver are the same in other control units, the functional description of the encoder / decoder and the transceiver in the other control unit will be omitted.

Ethernet controllers 23 and 33 in the axis control units 20 and 30 correspond to the second network control units 22 and 32 in FIG.
a, 33a and transceivers 23b, 33b. The axis control means 21 has five servo amplifiers 24-2.
8 is connected, and one servo amplifier 34 is connected to the axis control means 31. Although not shown in the figure, servo motors are connected to the ends of the servo amplifiers.

The Ethernet controller 43 in the screen control unit 40 corresponds to the third network control unit 42 and includes an encoder / decoder 43a and a transceiver 43b.
It is composed of The screen control means 41 has a CRT / MD
I44 is connected.

Next, the data transmission in the numerical controller constructed by the Ethernet LAN will be briefly described. FIG. 4 is a flowchart showing a transmission processing procedure of data transmission on the Ethernet LAN. [S1] The numerical controller makes a packet transmission request to the Ethernet controller. [S2] The Ethernet controller that receives the transmission request encodes the packet to be transmitted by the encoder unit. [S3] The transceiver in the Ethernet controller checks the existence of a packet on the network. That is, it is checked whether another control unit is transmitting. Thus, if another packet exists on the network, the process proceeds to step S5, and if not, the process proceeds to step S4. [S4] The transceiver transmits the packet. [S5] The waiting operation for the set time is performed, and after the waiting for the time, the operation goes to step S3. [S6] When packet transmission is started, a collision on the network is monitored, and if there is a collision, the process proceeds to step S7.
If there is no collision, go to step S10. [S7] The transceiver stops transmitting the packet. [S8] The waiting operation for the set time is performed. [S9] After waiting for a certain period of time, the packet is retransmitted. [S10] After the packet transmission is completed, the Ethernet controller waits for the return of the reception completion signal.

As a processing procedure on the receiving side, the control section on the receiving side constantly receives packets on the network and fetches the packets when the destination of the address is its own. Then, when the reception is completed, the reception completion signal is returned.

[0026]

As described above, in the present invention, the constituent elements in the numerical control device are connected by the network. Thereby, the complexity of the cable between each component can be reduced.

Further, a plurality of numerical control devices divided into groups are connected by a network, and input / output devices such as CRT / MDI are arranged at one place. As a result, a plurality of numerical control devices can be operated at one place, so that centralized management is possible.

[Brief description of drawings]

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

FIG. 2 is a principle block diagram of the numerical control system of the present invention.

FIG. 3 is an overall view of a numerical control device constructed by an Ethernet LAN.

FIG. 4 is a flowchart showing a transmission processing procedure for data transmission on an Ethernet LAN.

[Explanation of symbols]

 10 Numerical Control Section 11 Numerical Control Section 12 PMC Control Section 13 First Network Control Section 20 Axis Control Section 21 Axis Control Section 22 Second Network Control Section 30 Axis Control Section 31 Axis Control Section 32 Second Network Control Section 40 Screen Control Section 41 screen control means 42 third network control unit 50 network

Claims (4)

[Claims] 1. A numerical controller in which each component is distributed, a network, a first network control unit for controlling the network, a numerical controller for controlling the entire numerical controller, and a machine tool. A numerical control unit including a PMC control unit for controlling the network, a second network control unit for controlling the network, and a plurality of axis control units including an axis control unit for controlling a servo drive system; and a third control unit for controlling the network. A numerical control device comprising: a network control part; and a screen control part including a screen control means for controlling an input / output device. 2. The numerical controller according to claim 1, wherein the network is constructed by Ethernet which is a general-purpose LAN. 3. A numerical control system in which a plurality of numerical control devices are distributed, a network, a first network control unit for controlling the network, a numerical control means for controlling the entire numerical control device, and a machine tool. A plurality of axis control units including a numerical control unit including a PMC control unit for controlling the above, a second network control unit for controlling the network, and a plurality of axis control units for controlling the servo drive system. A numerical control system comprising: a group; a plurality of third network control units that control the network; and a screen control aggregation unit that includes a plurality of screen control units that control the input / output devices. 4. The numerical control system according to claim 3, wherein the network is constructed by Ethernet which is a general-purpose LAN.