Profibus device protocol input and output device with short circuit protection and self-diagnosis

Abstract

The invention discloses a Profibus-device protocol (DP) input and output (I / O) device with functions of short circuit protection and self-diagnosis. The device comprises an OEM2-SE interface unit and an I / O short circuit protection and self-diagnosis unit, wherein the OEM2-SE interface unit is used to perform data communication with the Profibus-DP, set the bus node number of the node, perform field data communication with the I / O short circuit protection and self-diagnosis unit and collect the input interface state and output interface state diagnosis data; the I / O short circuit protection and self-diagnosis unit is used to perform data communication with the peripheral equipment, and disconnect the power supply to provide short circuit protection and display the input interface state and / or output interface state when the short circuit of the input interface circuit and / or the output interface circuit happens. The Profibus-DP device of the invention has functions of short circuit protection and self-diagnosis, can disconnect the power supply to provide the self-diagnosis information when the short circuit of the interface circuit happens and can automatically return to work when the short circuit fault is eliminated.

Description

Technical field [0001] The present invention relates to the field of computer application technology, in particular to a Profibus-DP fieldbus input and output I / O device with short-circuit protection and self-diagnosis functions. Background technique [0002] At present, in order to communicate between devices, traditional input / output I / O devices need to connect the external end of the device and the end of the controller one-to-one through wires. This hard-wired connection method requires a lot of effort for on-site assembly. And debugging, and with the complexity of the system will increase a lot of hard wiring costs. [0003] In addition, the above-mentioned traditional input / output I / O devices do not have any protection and diagnosis functions. For example, they do not have the function of disconnecting the power supply in time when the interface power supply is short-circuited, and cannot provide any protection and diagnosis information. Once the I / O device fails, maintenanc...

AI Technical Summary

Problems solved by technology

[0006] But a kind of input and output I / O device with short-circuit protection and self-diagnosis function Profibus-DP field bus that possesses the device feature of the present invention does not appear at present, it has short-circuit protection and self-diagnosis function, can short-circuit in interface power supply In case of emergency, disconnect the power supply in time to avoid burning due to short-circuit current, and provide self-diagnostic information, which is convenient for maintenance personnel to monitor and troubleshoot the device.

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