DeviceNet fieldbus input/output device with short-circuit protection and self-diagnostic function

Abstract

The present invention discloses a DeviceNet fieldbus I / O device with short-circuit protection and self-diagnostic function, which comprises the following components: a DeviceNet interface unit which is used for executing data communication between the DeviceNet fieldbus, setting the bus node number and the communication baud rate of this node, and collecting and storing the input interface state and output interface state diagnosis data; an input / output short-circuit protecting and self-diagnosis unit which is used for executing data communication between the peripheral equipment, switching off the power for short-circuit protection and transmitting the input interface state and / or output interface state diagnosis data to the DeviceNet interface unit when the input / output interface circuit and / or the output interface circuit is shorted. The DeviceNet I / O device of the invention has the functions of short-circuit protection and self diagnosis, can switch off the power and provide self-diagnosis information when the interface power is shorted and automatically recover the operation when the short-circuit trouble is eliminated.

Description

technical field [0001] The invention relates to the field of computer application technology, in particular to a DeviceNet field bus 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 endpoints of the device with the endpoints of the controller one-to-one through wires. This hard-wired connection method requires a lot of energy for on-site assembly. And debugging, and with the complexity of the system will increase a lot of hard wiring costs. [0003] The above-mentioned traditional input / output I / O device does not have any protection and diagnosis functions, for example, it does 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, so once I When the I / O device is fault...

AI Technical Summary

Problems solved by technology

[0006] But a kind of input and output I / O device that has short-circuit protection and self-diagnosis function Device Net field bus that possesses device feature of the present invention does not appear yet at present, it has short-circuit protection and self-diagnosis function, can short-circuit when interface power supply takes place Cut off 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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