Numerical control system

Patent metadata

Field	Value
Publication number	US-9791850-B2
Application number	US-201514736590-A
Country	US
Kind code	B2
Filing date	Jun 11, 2015
Priority date	Jun 13, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A numerical control system exchanges input/output signals between a numerical controller and an IO unit and the IO unit includes a first control unit that changes an idle signal output from the IO unit using an input signal as a trigger to a specific waveform pattern signal and when the specific waveform pattern signal is received, transmits the specific waveform pattern signal to a former side. The numerical controller includes a second control unit that outputs an interrupt signal when the specific waveform pattern signal is received.

First claim

The invention claimed is:

1. A numerical control system having a numerical controller and one or a plurality of IO units connected to the numerical controller and in which input/output signals are configured to be exchanged between the numerical controller and the IO unit via serial communication, the IO unit comprising:
a first control unit configured to change an idle signal output from the IO unit using an input signal as a trigger to a preset specific waveform pattern signal and, transmit the specific waveform pattern signal to a former side when the specific waveform pattern signal is received and,
the numerical controller comprising:
a second control unit configured to output an interrupt signal when the specific waveform pattern signal is received.

2. The numerical control system according to claim 1 , wherein the first control unit of the IO unit is configured to change a period of the idle signal output from the IO unit and outputs the idle signal as the specific waveform pattern signal, when the input signal is input into the IO unit.

3. The numerical control system according to claim 2 , wherein the first control unit of the IO unit detects the specific waveform pattern signal in the changed idle signal when the IO unit on a latter side receives the input signal, changes the idle signal output from the IO unit to the specific waveform pattern signal, and outputs the idle signal to the IO unit on the former side, and, output the detected idle signal unchanged to the former side only when predetermined conditions are met.

4. The numerical control system according to claim 1 , wherein the first control unit of the IO unit is configured to insert a specific data pattern into the idle signal output from the IO unit and output the idle signal as the specific waveform pattern signal, when the input signal is input into the IO unit.

5. The numerical control system according to claim 4 , wherein the first control unit of the IO unit detects the specific waveform pattern signal in the changed idle signal when the IO unit on a latter side receives the input signal, changes the idle signal output from the IO unit to the specific waveform pattern signal, and outputs the idle signal to the IO unit on the former side, and, output the detected idle signal unchanged to the former side only when predetermined conditions are met.

6. The numerical control system according to claim 1 , wherein the first control unit of the IO unit is configured to change a phase of the idle signal output from the IO unit and output the idle signal as the specific waveform pattern signal, when the input signal is input into the IO unit.

7. The numerical control system according to claim 6 , wherein the first control unit of the IO unit detects the specific waveform pattern signal in the changed idle signal when the IO unit on a latter side receives the input signal, changes the idle signal output from the IO unit to the specific waveform pattern signal, and outputs the idle signal to the IO unit on the former side, and, output the detected idle signal unchanged to the former side only when predetermined conditions are met.

8. The numerical control system according to claim 1 , wherein the first control unit of the 10 unit detects the specific waveform pattern signal in the changed idle signal when the IO unit on a latter side receives the input signal, changes the idle signal output from the IO unit to the specific waveform pattern signal, and outputs the idle signal to the IO unit on the former side, and, output the detected idle signal unchanged to the former side only when predetermined conditions are met.

9. A numerical control system having a numerical controller and one or a plurality of IO units connected to the numerical controller and in which input/output signals are configured to be exchanged between the numerical controller and the IO unit via serial communication, the IO unit comprising:
a receiving unit configured to determine a type of an input signal input into the IO unit; and,
a third control unit configured to preset a specific waveform pattern of an idle signal output from the IO unit for each of the types of the input signal and output the preset specific waveform pattern of the idle signal output from the IO unit in accordance with the type of the input signal as a trigger; and,
the numerical controller comprising:
a fourth control unit configured to determine the type of the input signal in accordance with a specific waveform pattern signal when the specific waveform pattern is received.

10. The numerical control system according to claim 9 , wherein the third control unit of the IO unit is configured to detect the specific waveform pattern signal in the changed idle signal when the IO unit on a latter side receives the input signal, changes the idle signal output from the IO unit to the specific waveform pattern signal, and output the idle signal to the IO unit on a former side, and, output the detected idle signal unchanged to the former side only when predetermined conditions are met.

Assignees

• Fanuc Corp

Inventors

• Yoshida Kouhei
• Miyazaki Yoshito

Classifications

• G06F13/24

  using interrupt (G06F13/32 takes precedence) · CPC title

• G05B19/408 Primary

  characterised by data handling or data format, e.g. reading, buffering or conversion of data · CPC title

• G05B2219/34359

  Real time based interrupt to control axis, other function · CPC title

• G05B19/414 Primary

  Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller · CPC title