Numerical control system

A technology of numerical control and numerical control devices, applied in the general control system, control/regulation system, digital control, etc., can solve the problems of increased circuit scale and disadvantages, and achieve the effect of shortening the cycle time

Active Publication Date: 2017-07-14
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] If the technology disclosed in Japanese Patent Application Laid-Open No. 05-66820 or Japanese Patent Laid-Open No. 06-149320 is used, the increase in delay time can be prevented, but the above-mentioned method requires a mediation circuit for data transmission, resulting in a large circuit size. increase, which is unfavorable in IO units that strictly require low cost

Method used

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Examples

Experimental program
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Effect test

Embodiment approach 1

[0034] Embodiment 1 is a method of "changing the idle signal to a specific signal pattern and then notifying the numerical control device".

[0035] The numerical control system of the present invention changes the idle signal output from the IO unit 30 to a specific signal pattern when the IO unit detects the input of the touch sensor output. Since the idle signal changing to a specific mode is input to the numerical controller 10, the numerical controller 10 having detected the specific mode can detect the input of the touch sensor output through the IO unit 30 without waiting for the communication of the DI / DO signal. Thereby, on the basis of not requiring mediation for data transmission, there is no delay time, and it is possible to communicate to the numerical controller 10 that there is an input of the contact sensor output in the IO unit 30, so that the measurement operation can be performed immediately after the in-machine measurement operation is completed. Starts the...

Embodiment approach 2

[0042] Embodiment 2 is a method of "notifying the numerical controller after changing the period of the idle signal".

[0043] As a method of changing the specific signal pattern of the idle signal, a method of notifying the input of the touch sensor output by changing the cycle of the idle signal will be described.

[0044] The IO unit 30 includes a control unit (first control unit) that changes the cycle of the idle signal when the IO unit 30 receives an output signal from the touch sensor. On the other hand, the numerical controller 10 includes a control unit (second control unit) that turns on the interrupt signal only when it detects that the cycle of the idle signal is changed. With this configuration, it is possible to accurately notify the numerical controller 10 of the input of the touch sensor output without increasing the delay time.

[0045] figure 2 It is a figure explaining the embodiment for changing the period of an idle signal. When the output signal of th...

Embodiment approach 3

[0048] Embodiment 3 is a method of "mixing a specific data pattern into an idle signal and then notifying the numerical control device".

[0049] image 3 It is a diagram explaining an embodiment in which a data pattern is mixed into an idle signal. Explanation of touch sensor input time, delay time and shortened time is similar to Embodiment 2 figure 2 The instructions are the same.

[0050] Embodiment 3 is a mode in which a specific data pattern is mixed into an idle signal to notify that there is an input of a touch sensor output. When the IO unit 30 receives an output signal from the touch sensor, a control unit (first control unit) that mixes a specific data pattern into the idle signal is incorporated in the IO unit 30 . On the other hand, a control unit (second control unit) that turns on an interrupt signal only when a data pattern in which an idle signal is changed by a predetermined number of bits or more is detected is combined with the numerical controller 10 ....

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Abstract

The present invention provides a numerical control system that transmits and receives input and output signals between a numerical control device and an IO unit. The IO unit includes: a first control unit that uses the input signal as a trigger to output a signal from the IO unit. The idle signal is changed to a specific waveform pattern signal, and when the specific waveform pattern signal is received, the specific waveform pattern signal is transmitted to the preceding stage. The numerical control device includes a second control unit that outputs an interrupt signal when a specific waveform pattern signal is received.

Description

technical field [0001] The present invention relates to a numerical control system that shortens the delay time when transmitting an input signal from an external input / output unit (IO unit) to a numerical control device for controlling a machine tool or a robot through serial communication. Background technique [0002] In order to input and output DI / DO signals (input signal / output signal) between the numerical control device and the machine tool or robot (hereafter referred to as "numerical control machine tool"), a structure in which multiple IO units are connected is adopted. In addition, generally, the numerical controller and the IO unit exchange DI / DO data at certain intervals. The numerical control device and the IO unit exchange DI / DO data every certain period, but when there is no exchange of DI / DO data, a signal (idle signal) that repeatedly toggles (idle signal) is input and output at a certain period. [0003] On the other hand, for DI / DO transmission and rece...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/414
CPCG05B19/414G05B19/408G05B2219/34359G06F13/24
Inventor 吉田幸平宫崎义人
Owner FANUC LTD
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