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PLC (Programmable Logic Controller) with synchronous pulse output function

A technology of pulse synchronization and function, which is applied in the direction of program control and electrical program control in sequence/logic controllers, can solve the problems of increasing costs and resource waste, and achieve the effects of reducing user costs, saving resources, and good synchronization performance

Inactive Publication Date: 2012-04-18
SHANGHAI ELECTRICAL APP RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly increases the cost of the entire system and causes a great waste of resources

Method used

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  • PLC (Programmable Logic Controller) with synchronous pulse output function
  • PLC (Programmable Logic Controller) with synchronous pulse output function
  • PLC (Programmable Logic Controller) with synchronous pulse output function

Examples

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Embodiment Construction

[0020] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.

[0021] like figure 1 As shown, the present invention provides a PLC with a pulse synchronous output function, including a separate single-chip microcomputer and a programmable logic device (FPGA). In this embodiment, the single-chip microcomputer selects ARM of NXP Company as the main CPU. FPGA is responsible for high-speed counter acquisition of high-speed pulse input, high-speed pulse output and other functions. The separation design of the two most important parts and the main CPU chip ARM greatly reduces the workload of the main chip, reduces the scanning cycle of the entire PLC, and greatly improves the performance of the PLC.

[0022] Programmable logic devices mainly include the following three modules:

[0023] High-speed counter module: The high-speed counter module accurately counts the pulse signals of the rotary enc...

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PUM

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Abstract

The invention relates to a PLC (Programmable Logic Controller) with a synchronous pulse output function The PLC is characterized by comprising a separate single-chip microcomputer and a programmable logic device, wherein the programmable logic device comprises a high-speed counter module, a communication control module and a high-speed pulse output module. The PLC has the following advantages: firstly, synchronous commands of the PLC are convenient to use and have good synchronization performance; meanwhile, the execution efficiency of the PLC is greatly increased, and the whole scanning period of the PLC is shortened; therefore, industrial movement control response is faster, and position control is more accurate; secondly, the PLC can simultaneously carry out synchronous operation on multiplex pulses and is suitable for a multi-shaft controlled movement system; and thirdly, the PLC can be applied to flying shears and devices needing two or multiple synchronous motors for fixed length cutting and the like and has good social benefits.

Description

technical field [0001] The invention relates to a programmable controller with high-speed pulse output function and high-speed counter function, which is used for synchronizing two motors. Background technique [0002] PLC (programmable logic controller) is widely used in practical projects because of its high reliability, good real-time performance, powerful functions and easy use in harsh environments. High-speed pulse output function and high-speed counter function are important components of PLC in the field of position control and motion control. The motor is driven by high-speed pulse output, the speed and direction of rotation of the motor can be sampled by the pulse encoder, converted into pulse form, and then the high-frequency pulse is accurately counted by the high-speed counter, so as to realize the control of the motor by PLC. PLC with these two functions can be applied in various industrial fields such as position control and motion control such as textile mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
Inventor 应成琚长江薛吉程睿远杨心丽
Owner SHANGHAI ELECTRICAL APP RES INST
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