User Manual

LOGO! functions

4.4 Special functions list - SF

LOGO!

Manual, 04/2011, A5E03556174-01

271

4.4.34 Analog filter (0BA7 only)

Short Description

The analog filter function smooths the analog input signal.

Symbol in LOGO! Wiring Description

Ax Input Ax is the analog input signal to be smoothed.

Input Ax is one of the following analog signals:

• AI1 to AI8 (*)

• AM1 to AM16

• NAI1 to NAI32

• AQ1 to AQ2

• NAQ1 to NAQ16

• Block number of a function with analog output

Parameter Sn (Number of samples) determines how many

analog values are sampled within the program cycles

that are determined by the set number of samples.

LOGO! samples an analog value within every

program cycle. The number of program cycles is

equal to the set number of samples.

Possible settings:

8, 16, 32, 64, 128, 256

3DU

Output AQ AQ is the average value of input Ax over the current

number of samples.

* AI1...AI8: 0...10 V corresponds with 0...1000 (internal value).

Timing diagram (example)

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