Distributed I/O System ET 200S

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Digital electronic modules 3.2 Parameters of the Digital Electronic Modules 3.2.5 Chatter monitoring Definition Activating chatter monitoring Detecting unusual signal patterns Reporting a chatter error Resetting a chatter error Chatter monitoring is a process control function for digital input signals. It detects and reports signal characteristics that are unusual from a process engineering viewpoint, such as the input signal fluctuating too frequently between "0" and "1". If signal characteristics like these occur, it is a sign that the sensors are faulty or that there are instabilities from a process engineering viewpoint. You activate chatter monitoring by setting the number of signal changes for chatter monitoring to a value other than zero. Each input channel has a monitoring window that has been assigned parameters. The monitoring window is started the first time the input signal changes. If the input signal changes more within the monitoring window than the configured number of signal changes, this is recognized as a flutter error. If a flutter error is not detected within the monitoring window, the monitoring window is started again at the next signal change. If a chatter error has occurred, the current signal status is entered in the process image and the value of the signal is set to "invalid". A chatter error is also entered as diagnostic information, triggering an incoming diagnostic interrupt. You must evaluate and process the status of the value and the diagnostic information in the user program. If no further chattering of the input signal is detected within three monitoring windows, the diagnostic entry is removed and an outgoing diagnostic interrupt is triggered. The status of the value of the current signal in the process image is set to "valid". ET 200S 3-6 Manual, 12/2005, A5E00514527-03
Principles 3.3 3.3 Properties Digital electronic modules 3.3 2DI 24 VDC ST digital electronic module (6ES7131-4BB01-0AA0) The following figure gives you another graphic illustration of the principle of chatter monitoring. Figure 3-2 The principle of chatter monitoring 2DI 24 VDC ST digital electronic module (6ES7131-4BB01-0AA0) General terminal assignment • Digital electronic module with two inputs • Nominal input voltage 24 VDC • Suitable for switches and proximity switches (BEROs) Note Terminals 4, 8, A4, A8, A3 and A7 are only available at specified terminal modules. ET 200S Manual, 12/2005, A5E00514527-03 3-7
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SIMATIC Distributed I/O System ET 2
Page 3 and 4: Table of contents 1 Terminal module
Page 5 and 6: Table of contents 4.3 Basics of ana
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Analog electronics modules 4.2 Anal
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.2
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.2
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.2
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.3
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.3
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.3
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.4
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4 IQ-SENSE (6ES7138-4GA00-0AB0) 5.4
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Potential distributor module 6.1 Po
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Potential distributor module 6.1 Po
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RESERVE modules Pin assignment Note
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Glossary Configuration Connecting t
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Glossary Frequency converter Ground
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Glossary Power modules Prewiring Pr
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Glossary Real time Reference potent
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Glossary Terminal modules Terminati
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Index Analog electronic module 2AI
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Index T Terminal module TM-E15S24-0
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Safety Guidelines This manual conta
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Table of contents ET 200S iv Produc
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Introduction ET 200S 1-2 Product In
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New Information About the "ET 200S
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Index ET 200S Index-2 Product Infor
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Safety Guidelines This manual conta
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Table of contents Distributed I/O S
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Introduction 1.1 Introduction Distr
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Product Information 2.2 Digital Ele
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Index Distributed I/O System ET 200
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Product Information on Manual Distr
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