Security logic control system with combination of integrated type control and distributed type control in numerical control of machine tool

Abstract

The invention discloses a security logic control system with combination of an integrated type control and a distributed type control in the numerical control of a machine tool. The security logic control system is characterized by comprising a numerical control subsystem and a logic control subsystem, wherein the numerical control subsystem and the logic control subsystem change information with each other; the logic control subsystem is connected with an intelligent module and an I / O (input / output) module through a serial communication bus; the I / O module is managed by a main controller; the logic control subsystem comprises a control resource manager, a control logic program editor, a control logic program compiler, an intelligent module program downloader and a main control program interpretation executor; and the intelligent module comprises a divided control program receiver and a divided control program interpretation executor. The security logic control system ensures that security switches such as an axis limiting switch and an emergency stopping switch can still work normally under the situation that a control calculation center is out of work; and moreover the logic control efficiency can be partially improved greatly, so that the I / O control efficiency of the machine tool is improved, the control response time is reduced greatly, and the control security and the stability of a numerical control machine tool are improved greatly.

Description

technical field [0001] The invention relates to an I / O control system in a machine tool numerical control system. Background technique [0002] The machine tool numerical control system is a digital machine tool control system, which converts the macro motion instructions describing the relative movement of the tool and the workpiece into periodic servo system control instructions; It moves relative to the workpiece to realize the processing of the workpiece. Usually, the CNC system of machine tools also has a set of I / O control system in addition to the motion control function. Work is the key to the safe and stable operation of the machine tool and an important part of the CNC system. [0003] With the advancement of technology, the I / O control system of CNC machine tools has experienced several generations of development. [0004] 1. Relay logic system [0005] The I / O logic control of early CNC machine tools is independent of the CNC system and is completely realized...

AI Technical Summary

Problems solved by technology

[0018]The advantage of the centralized structure is that it directly interacts with the processor and has good real-time performance. Causes loss of original input information and final output information, and increases wiring costs

The advantage of the decentralized structure is to save wiring costs, and the disadvantage is that the communication link causes system delay and reduces the real-time performance of the system

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