Step 7 - none,weak,medium,strong

L D[AR2P#0.0] · Feb 6, 2007

I'm using a 6ES7-134-4FB01-0AB0 ET200S Analogue input module. The smoothing available is described as NONE, WEAK, MEDIUM and STRONG !

Does anyone know what the cut-off frequencies are for the different smoothing options ? I'm after 5Hz

krk · Feb 6, 2007

Simon,

I think they're multiples of scan time...

NONE = 1x
WEAK = 4x
MEDIUM = 16x
STRONG = 32x

Kevin

L D[AR2P#0.0] · Feb 6, 2007

Where did you find the info ?

krk · Feb 6, 2007

ET200S manual 12/2005 A5E00698438-01
or
ET200S operating instructions 3/2006 A5E00743001-01

Sorry...don't have the links as I keep a copy on my HD

STL??? · Feb 6, 2007

This manual:
https://a248.e.akamai.net/cache.automation.siemens.com/dnl/TU2MTU2NwAA_1144348_HB/BA_ET200S_e.pdf

page 400



  Input range (rated value) / input resistance

  • Voltage ± 10 V / min. 0.8 MΩ

  ± 5 V / min. 0.8 MΩ

  1 V to 5 V / min. 0.8 MΩ

  Permitted input voltage (destruction limit) 35 V continuous

  75 V for 1 ms max., pulse duty factor 1: 20

  Smoothing of the measured values Yes, parameters can be assigned in 4 steps by

  means of digital filtering

  Step

  None     1 x cycle time

  Weak     4 x cycle time

  Medium   16 x cycle time

  Strong   32 x cycle time

  Time constant

Peter Nachtwey · Feb 6, 2007

This is interesting

The smoothing must be done in software because an RC filter wouldn't care about the scan/cycle times. If they aren't going to do the filtering in hardware then why not just use a low pass filter function?

krk · Feb 6, 2007

Peter Nachtwey said:
..then why not just use a low pass filter function?

Simon - I think Peter may be referring back to this post!

http://www.plctalk.net/qanda/showpost.php?p=182790&postcount=2

L D[AR2P#0.0] · Feb 6, 2007

Ok - I've now had time to study the manual and I thought the analogue input module in question was a lot faster (100 microseconds) than it actually is (130 milliseconds) - I wont be using the smoothing in the module.

Thanks for the help.

Step 7 - none,weak,medium,strong

L D[AR2P#0.0]

Lifetime Supporting Member

krk

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L D[AR2P#0.0]

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krk

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STL???

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Peter Nachtwey

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krk

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L D[AR2P#0.0]

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