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An abnormal state diagnosis device and method of an analog input channel

An abnormal state, analog input technology, used in instruments, test/monitoring control systems, control/regulation systems, etc., can solve the problem of not being able to indicate whether the input signal is in an abnormal state or not.

Active Publication Date: 2021-08-31
SIEMENS CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the LEDs configured for analog input channels usually cannot indicate whether the input signal of the analog input channel has an abnormal state

Method used

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  • An abnormal state diagnosis device and method of an analog input channel
  • An abnormal state diagnosis device and method of an analog input channel
  • An abnormal state diagnosis device and method of an analog input channel

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Embodiment Construction

[0020] figure 1 A schematic structural diagram of Embodiment 1 of the device according to the present invention is shown. Such as figure 1 As shown, the abnormal state diagnosis device 10 includes:

[0021] A steady state determining module 11, which receives an input signal of an analog input channel, and determines whether the input signal reaches a steady state according to a change of the input signal;

[0022] A baseline value generation module 12, which generates the baseline value of the input signal according to the statistical value of the input signal under the condition that the input signal reaches a steady state;

[0023] An abnormal state diagnosis module 13, which monitors the deviation between the statistical value of the input signal and the baseline value, and determines whether the input signal is in an abnormal state according to the deviation.

[0024] In the embodiment according to the present invention, the statistical characteristics of the input sig...

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Abstract

The invention provides an abnormal state diagnosis device and method of an analog input channel. The device includes: a steady state determination module, which receives an input signal of the analog input channel, and determines whether the input signal has reached a steady state according to the change of the input signal; Under the condition of reaching a steady state, generate the baseline value of the input signal according to the statistical value of the input signal; the abnormal state diagnosis module monitors the deviation between the statistical value of the input signal and the baseline value, and according to the Deviation determines whether the input signal is in an abnormal state. According to the embodiment of the present invention, the abnormal state of the input signal of the analog input channel can be detected in time, which provides convenience for the maintenance and operation of the field equipment, and can be implemented on the basis of the existing hardware device of the industrial control equipment, which is economical and convenient.

Description

technical field [0001] The invention relates to a diagnostic device and method for industrial control equipment, in particular to an abnormal state diagnostic device and method for analog input channels of industrial control equipment. Background technique [0002] At present, industrial control equipment such as programmable logic controller (PLC) and distributed control system (DCS) are more and more widely used in industrial automation. Industrial control equipment such as PLC and DCS usually have analog input (AI) channels to receive analog input from field devices, such as process variables such as temperature, pressure, and flow. These analog inputs are usually sensed and measured by corresponding sensors, and then passed through The transmitter converts the electrical signal into the analog input channel of the industrial control equipment. [0003] The analog input channel of industrial control equipment is usually configured with one or more LEDs to indicate the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0259
Inventor 胡喜卓越李季黄立明
Owner SIEMENS CHINA
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