A method for expanding the monitoring port of io digital quantity based on the serial port network

Abstract

A serial port network based IO digital quantity monitoring port extension method comprises: S1, mounting a monitoring board card with a FPGA monitoring logic to a serial port network controlled by a board card with a microcontroller; S2, performing monitoring on I / O digital quantity by using the FPGA monitoring logic distributed on the monitoring board card, and transmitting a monitoring result of the I / O digital quantity by the FPGA monitoring logic to the microcontroller by using the serial port network; and S3, finishing arrangement and correction on I / O digital quantity monitoring result information by using the microcontroller, and providing a monitoring report. According to the serial port network based IO digital quantity monitoring port extension method, an extended I / O digital quantity port is realized on other board cards, and testing information is transmitted back to the board card of the microcontroller by using a serial port bus, so that a circuit for monitoring relevant functions of the I / O digital quantity does not need to be realized on the board card of the microcontroller, and the board card of the microcontroller can better fulfill other functions.

Description

technical field [0001] The invention relates to the monitoring field of industrial control systems, in particular to an IO digital quantity monitoring port expansion method based on a serial port network. Background technique [0002] IO (or written as I / O) type digital quantity is a type of signal that is often monitored in industrial control systems. It is usually used as a switch signal in an embedded system to control the system from one state to another during the operation of the system. conversion. Therefore, real-time monitoring of I / O digital quantities can help to better understand the operating status and operating process of the system, facilitate timely correction of system operating deviations, adjust the system's operating rhythm, and improve system operating efficiency. The prior art usually uses a microcontroller to directly monitor the I / O type digital quantity, but when the I / O type digital quantity to be monitored exceeds the maximum number of digits tha...

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is: provide a kind of IO type digital quantity monitoring port expansion method based on the serial port network, solve the problem that the expansion method in the prior art will occupy a large amount of area of ​​the board, and at the same time it will inevitably affect the normal operation of other monitoring functions implementation problem

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