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PLC system and its temperature measurement and control expansion module, its implement method

A technology for temperature measurement and expansion modules, which is applied in the field of expansion modules and PLC systems, can solve the problems of increasing module costs and achieve the effect of improving capabilities and real-time performance

Inactive Publication Date: 2008-01-16
深圳市合信自动化技术有限公司
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  • Abstract
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Problems solved by technology

[0007] 3. Increased module cost

Method used

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  • PLC system and its temperature measurement and control expansion module, its implement method
  • PLC system and its temperature measurement and control expansion module, its implement method
  • PLC system and its temperature measurement and control expansion module, its implement method

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Embodiment Construction

[0025] The present invention is implemented in the PLC system to provide an efficient PLC temperature measurement and control expansion module, and performs the calculation of the PID regulator on the basis of accurate temperature measurement, so as to realize the measurement and control of the temperature, so as to improve the real-time performance of the PID calculation, and at the same time The output of the PID adjuster can be executed by the PLC, thereby improving the flexibility of the PLC without reducing the performance of the PLC.

[0026] In order to solve the above problems, an embodiment of the present invention provides a PLC temperature measurement and control expansion module. In a PLC system with temperature measurement and control expansion modules, the PID temperature module is an independent subsystem, and the expansion bus is a bus system in which the PLC is the main controller. If the controller output is executed by the PLC main CPU, it is necessary to pr...

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Abstract

The invention discloses a temperature measurement and control expansion module for PLC, which comprises an expansion bus interface connected to a master controller, wherein at least a register of PID adjuster parameters is disposed in the expansion bus interface and used for making the master controller of PLC to randomly set PID adjuster parameters through the expansion bus interface; at least a register of PID adjuster output values is disposed in the expansion bus interface and used for storing temperature values obtained by measurement and PID temperature output values obtained by calculation of the PID adjuster and providing these values to the master controller of PLC for implementation. The invention also discloses a PLC system and a method for measuring and controlling temperature using the temperature measurement and control expansion module for PLC. The invention can simplify the control program of PLC user, reduce the complexity of the control program application, and improve system stability.

Description

technical field [0001] The invention relates to the field of programmable logic controller (Programmer Logical Control, PLC), in particular to an expansion module for temperature measurement and control of a programmable logic controller, a PLC system and a method for realizing temperature measurement and control thereof. Background technique [0002] The Proportion Integral Derivative (PID) controller has the advantages of simple structure and low cost, and is widely used in various control devices in industrial production. The key to the application of PID controller is parameter setting and online adjustment. The temperature expansion module of the programmable logic controller with PID regulator operation and output drive can perform temperature measurement, and after measuring the temperature sensor connected to the site, it can directly perform PID adjustment output on the temperature control target. and drive the output. [0003] As shown in FIG. 1 , the temperature...

Claims

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Application Information

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IPC IPC(8): G01K1/02G01K1/022
Inventor 戎思吉陈海峰周云宇
Owner 深圳市合信自动化技术有限公司
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