Numerical control device for realizing high-speed input and output of external signal in servo controller

Patent metadata

Field	Value
Publication number	US-2017146973-A1
Application number	US-201615355255-A
Country	US
Kind code	A1
Filing date	Nov 18, 2016
Priority date	Nov 19, 2015
Publication date	May 25, 2017
Grant date	—

Abstract

A numerical control device includes a CPU for outputting a position command value of a servomotor; an IC including a servo controller for outputting a current command value to an amplifier for driving the servomotor, and an I/O unit for inputting and outputting an external signal; a DSP for reading the position command value and performing control so as to move the servomotor to a position indicated by the position command value; and an inter-device communication path between the CPU and the IC. The IC includes an internal bus connected to a communication interface connected to the inter-device communication path, and the I/O unit; and an internal communication path for directly transmitting a signal between the servo controller and the I/O unit without passing through the internal bus.

First claim

What is claimed is:

1 . A numerical control device comprising:
a CPU for outputting a position command value of a servomotor; an integrated circuit including a servo controller for outputting a current command value to an amplifier for driving the servomotor, and an I/O unit for inputting and outputting an external signal; a DSP for reading the position command value and performing control so as to move the servomotor to a position indicated by the position command value; and an inter-device communication path between the CPU and the integrated circuit, wherein the integrated circuit includes: an internal bus connected to a communication interface connected to the inter-device communication path, and the I/O unit; and an internal communication path for directly transmitting a signal between the servo controller and the I/O unit without passing through the internal bus.

2 . The numerical control device according to claim 1 , wherein
the I/O unit distinguishes between a first type of data that is directly communicated with the servo controller without passing through the CPU and a second type of data that is communicated with the servo controller through the CPU; data distinguished to be the first type of data is transmitted to the servo controller through the internal communication path; and data distinguished to be the second type of data is transmitted to the CPU through the internal bus, the communication interface, and the inter-device communication path.

3 . The numerical control device according to claim 1 , wherein the servo controller is connected to the internal bus.

4 . The numerical control device according to claim 1 , wherein the DSP is contained in the CPU.

5 . The numerical control device according to claim 1 , wherein the inter-device communication path is compatible with a serial communication interface.

Assignees

• Fanuc Corp

Inventors

• Hada Kouji
• Miyazaki Yoshito
• Komatsu Takaaki
• Sakoda Yasumichi

Classifications

• G05B19/19 Primary

  characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path · CPC title

• G05B2219/50047

  Positioning, indexing · CPC title

• G05B19/4147 Primary

  characterised by using a programmable interface controller [PIC] · CPC title

• G05B19/4142 Primary

  characterised by the use of a microprocessor (G05B19/4141 takes precedence) · CPC title

• G05B2219/34013

  Servocontroller · CPC title