Program control digital quantity input and output board card based on domestic CPU

A technology of digital input and board card, which is applied in the program control and electrical program control of the sequence/logic controller, etc. It can solve the problems of low safety factor, no safety isolation between the field end and the system control end, etc., and achieve The effect of improving the ability to resist electromagnetic interference

Pending Publication Date: 2021-04-16
中电智能科技有限公司
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  • Abstract
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Problems solved by technology

Since the patent only detects faults for the output, and the field end and the system control end are not safely isolated, the safety factor is not high

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  • Program control digital quantity input and output board card based on domestic CPU

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] A block diagram of a program-controlled digital input and output board based on a domestic CPU. The block diagram is shown in the attached figure, including a microprocessor, a slave station controller, an optocoupler isolator, and a digital input and output circuit module.

[0023] The slave station controller implements the EtherCAT slave station physical layer and data link layer protocol. The slave station controller adopts ET1100 or ET1200, and this embodiment adopts ET1200. Two communication interfaces are provided, and the physical layer of the two communication interfaces adopts the form of EBUS, and the data flow is input from EBUS0 and output from EBUS1. In order to improve the ability of EBUS communication to resist electromagnetic interference, common-mode and differential-mode inductances are added to the EBUS low-voltage differenti...

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Abstract

The invention relates to a program control digital quantity input and output board card based on a domestic CPU. The system comprises a microprocessor, a slave station controller, an optocoupler isolator and a digital quantity input and output circuit module A. After the slave station receives data through the EBUS, the slave station communicates with the microprocessor through the SPI bus, and then the microprocessor completes three aspects of work according to configuration information: outputting digital quantity signals, receiving digital quantity input and receiving field diagnosis information. And finally, the digital quantity input and output circuit module completes digital quantity input and output and on-site end fault acquisition and diagnosis operation according to an instruction of the microprocessor. Compared with other digital acquisition cards, the board card adopts domestic devices and has good autonomous controllability. The board card single channel can be configured as a digital quantity input and output channel, and the integration level is higher. The board card provides digital quantity output recovery diagnosis and digital quantity input disconnection diagnosis, and the safety is higher.

Description

technical field [0001] The invention belongs to the field of EtherCAT (Ethernet Control Automation Technology), in particular to an industrial real-time Ethernet EtherCAT digital slave station system. Background technique [0002] EtherCAT is a field bus based on Ethernet, which has the characteristics of high real-time network, flexible topology and system configuration. With the improvement of industrial real-time requirements, EtherCAT has been used more and more. Numerous EtherCAT-based slave products are already available. The patent with the authorization number CN201010249162.0 discloses a PLC digital output control device and its control method, including a PLC input and output control module and a switch module. The PLC input and output control module is connected to the switch module, wherein the switch control module includes two Each drive switch tube is provided with a feedback detection circuit; the drive switch tube is used to receive the control signal outp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
Inventor 林浩赵德政陈海刘骏张彪刘琛刘云龙王永峰
Owner 中电智能科技有限公司
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