Beckhoff DK9222-0909-0005 User Manual download pdf

XFC

XFC technology oversampling

Application Note DK9222-0909-0005

Keywords

XFC

oversampling

Distributed Clocks

EtherCAT

EL1262

EL2262

EL3632

EL3702

EL3742

EL4712

EL4732

Oversampling

Oversampling is a special type of signal sampling that is used for reﬁning the time resolution of a signal.

Detection of the signal curve is reﬁned according to the set oversample factor, so that high resolutions of

up to 1 µs (digital EL12xx input terminals) and 10 µs (analog EL37xx input terminals) are possible.

Technical background

Oversampling means that a signal is scanned with a higher frequency within the terminal than would be required for the signal

transfer. The time window of the signal variation is narrower than the duration of a communication cycle, since sampling takes

place several times within a communication cycle. In order to maintain the chronology of the events, a whole set of process

data is transferred to the controller during the next communication cycle.

Achieving shorter cycle times via high-performance ﬁeldbus technology and high-performance processors is one technique for

improving the time resolution of the signal curve in the ﬁeld. Alternatively, the higher precision can be achieved through high-

precision input and output terminals, rather than during data transfer. This technical approach for ﬁner time resolution of the

data requires a reliable time relationship between all system devices to be generated.

New Automation Technology

Beckhoff

For application notes see disclaimer on the last page

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Summary of Contents

Page 1 - Oversampling

XFCXFC technology oversamplingApplication Note DK9222-0909-0005KeywordsXFCoversamplingDistributed ClocksEtherCATEL1262EL2262EL3632EL3702EL3742EL4712EL

Page 2 - XFC technology oversampling

XFCXFC technology oversamplingApplication Note DK9222-0909-0005 Fig. 1 Local clock generators in the ﬁeldThis is possible through the distributed clo

Page 3

XFCXFC technology oversamplingApplication Note DK9222-0909-0005communication cycle is divided into 10 intervals. The change of state at the input or o

Page 4

XFCXFC technology oversamplingApplication Note DK9222-0909-0005Practical applications: vibration analysisSampling of an analog input signal with the E

Page 5

XFCXFC technology oversamplingApplication Note DK9222-0909-0005This publication contains statements about the suitability of our products for certain

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Beckhoff DK9222-0909-0005 User Manual

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