Control system of numerical control system master station over input/output (IO) terminal slave station

Abstract

The invention discloses a control system of a numerical control system master station over an input / output (IO) terminal slave station. The control system comprises the numerical control system master station and the IO terminal slave station, wherein the numerical control system master station comprises a hardware platform and a soft body part positioned on the hardware platform; and the soft body part comprises a numerical control software module arranged on a Linux operating system and an EtherCAT communication protocol stack module connected with the numerical control software module. A control instruction is transmitted to the IO terminal slave station in a network transmission manner according to an EtherCAT bus communication protocol through output / input pins on a soft circuit driving layer module and input / output pins on IO terminals of the IO terminal slave station, and the input / output pins are in one-one mapping connection, so that the IO terminal slave station can be controlled. The control system is high in instantaneity, high in communication speed, relatively high in synchronism, open in software structure and relatively high in network communication capacity and data processing capacity.

Description

technical field [0001] The invention relates to a control system, in particular to a control system for a master station of a numerical control system to an IO terminal slave station. Background technique [0002] In the field of numerical control that controls IO terminal slave stations with IO terminals, traditional fieldbuses and PLCs have been widely used, but there are still some disadvantages. [0003] (1) Traditional fieldbus and its disadvantages: [0004] The fieldbus system is a hierarchical control structure composed of several layers of subsystems (usually divided into several layers of loops), including: actual control task calculation loop, fieldbus loop, local expansion bus of I / O system or just peripheral equipment The local firmware program loops. This cyclic control structure makes the response time of the whole system 3-5 times of the control cycle time under normal conditions. The longer system response time makes the traditional fieldbus system increa...

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Problems solved by technology

[0009] On the one hand, the purpose of the present invention is to solve the problem that the traditional field bus needs a long system response time when transmitting data, that is, the problem of poor real-time performance; A control system with good real-time performance, faster communication speed, better synchronization performance, open network architecture, strong network communication ability and data processing ability

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