Controller fault detection system of intelligent transmitter

Abstract

The invention provides a controller fault detection system of an intelligent transmitter. The controller fault detection system comprises a logic fault detection module, a fault current control module, a fault current output module and a power source. The logic fault detection module is connected with a controller of the intelligent transmitter, the fault current control module is connected with the logic fault detection module, and the fault current output module is connected with the fault current control module. The fault current control module is further connected with the controller, and the power source end of the fault current output module is connected with the power source. The fault of the controller of the intelligent transmitter can be accurately detected, complex circuit connection can be avoided, and it can be ensured that the logic control of the controller is accurate and clear; the structure is simple, and the using cost is effectively lowered.

Description

technical field [0001] The invention relates to the field of intelligent transmitters, in particular to a controller fault detection system of an intelligent transmitter. Background technique [0002] Smart transmitters have been widely used in industrial control. When the controller of the smart transmitter (referred to as CPU in English) fails and the current output fails, the main solution is to use transmitter redundancy to judge and detect the fault. That is: add another intelligent transmitter at the same position as the original transmitter, and use two transmitters to collect and output data at the same time. If one of them fails, then the output value of the other transmitter will be used. Compared with the output value of the faulty transmitter, then judge and detect the fault, and carry out alarm processing through the detection device or system, the cost of using the above method is extremely high, and the wiring on site is difficult. It is technically difficult...

AI Technical Summary

Problems solved by technology

[0002] Smart transmitters have been widely used in industrial control. When the controller of the smart transmitter (referred to as CPU in English) fails and the current output fails, the main solution is to use transmitter redundancy to judge and detect the fault. That is: add another intelligent transmitter at the same position as the original transmitter, and use two transmitters to collect and output data at the same time. If one of them fails, then the output value of the other transmitter will be used. Compared with the output value of the faulty transmitter, then judge and detect the fault, and carry out alarm processing through the detection device or system, the cost of using the above method is extremely high, and the wiring on site is difficult. It is technically difficult for the transmitter to perform programming, judgment and other operations; therefore, a dual-CPU method has gradually been proposed, that is to say, two controllers are set in the intelligent transmitter, and within the allowable range of power consumption, Using one of the CPUs to monitor the other CPU, this method is likely to cause logic confusion, resulting in inaccurate control of the transmitter, the same industrial programming and development difficulties, and on-site wiring difficulties

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