Enhanced programmable logic controller (PLC)

Abstract

The invention discloses an enhanced programmable logic controller (PLC) which is characterized in that: a communication module includes a USB interface module, a CAN communication interface module, and an RS-485 communication interface module; the USB interface module is connected to a processor chip; the CAN communication interface module is connected to the processor chip through a CAN interface isolating circuit; and the RS-485 communication interface module is connected to the processor chip through an RS-485 bus isolating circuit. The advantages are that: the enhanced PLC has strong flexibility; 5V direct current can be provided to the enhanced PLC through the USB interface module, and meanwhile a circuit operation state can be transmitted to an outer part to be analyzed; and signals of the CAN communication interface module and the RS-485 communication interface module are isolated from the processor chip, so that interference on the chip of the enhanced PLC can be reduced.

Description

technical field

[0001] The invention relates to a programmable controller, especially an enhanced programmable controller. Background technique

[0002] Programmable controller is an electronic system for digital operations. It uses a type of programmable memory for internal storage programs to perform user-oriented instructions such as logic operations, sequential operations, timing, calculations, and arithmetic operations. Or analog signal input and output to control various types of machinery or production processes. At present, the most commonly used small programmable controllers mainly use a single bus communication or their own communication protocols, which have poor adaptability and reliability when they need to communicate with multiple devices with different protocols and different interference levels at the same time; and the commonly used small Programmable controllers generally do not have analog input / output interfaces, and usually need to add additional anal...

Examples

Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 , figure 2 As shown, an enhanced programmable controller includes a processor chip 1 of model STM32F407VGT6, a communication module, an analog signal transmission module 2 and a digital signal transmission module 3, and the processor chip 1 is connected with the communication module and the analog signal transmission module respectively. 2 and digital signal transmission module 3 are connected, and communication module comprises USB interface module 41, CAN communication interface module 42 and RS-485 communication interface module 43, and USB interface module 41 is connected with processor chip 1, and CAN communication interface module 42 passes CAN interface The isolation circuit 44 is connected to the processor chip 1 , and the RS-485 communication interface module 43 is connected to the processor chip 1 through th...

technical field

[0001] The invention relates to a programmable controller, especially an enhanced programmable controller. Background technique

[0002] Programmable controller is an electronic system for digital operations. It uses a type of programmable memory for internal storage programs to perform user-oriented instructions such as logic operations, sequential operations, timing, calculations, and arithmetic operations. Or analog signal input and output to control various types of machinery or production processes. At present, the most commonly used small programmable controllers mainly use a single bus communication or their own communication protocols, which have poor adaptability and reliability when they need to communicate with multiple devices with different protocols and different interference levels at the same time; and the commonly used small Programmable controllers generally do not have analog input / output interfaces, and usually need to add additional anal...

Examples

Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 , figure 2 As shown, an enhanced programmable controller includes a processor chip 1 of model STM32F407VGT6, a communication module, an analog signal transmission module 2 and a digital signal transmission module 3, and the processor chip 1 is connected with the communication module and the analog signal transmission module respectively. 2 and digital signal transmission module 3 are connected, and communication module comprises USB interface module 41, CAN communication interface module 42 and RS-485 communication interface module 43, and USB interface module 41 is connected with processor chip 1, and CAN communication interface module 42 passes CAN interface The isolation circuit 44 is connected to the processor chip 1 , and the RS-485 communication interface module 43 is connected to the processor chip 1 through th...

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