LOGO! functions

4.4 Special functions list - SF

Examples with Timing Diagrams

The following examples show how the PWM instruction modulates a digital output signal from the analog input value:

Example 1

Analog input value: 500 (range 0 ...1000)

Periodic time T: 4 seconds

The digital output of the PWM function is 2 seconds high, 2 seconds low, 2 seconds high, 2 seconds low and continues in that pattern as long as parameter "En" = high.

(Q

0D[ 

$[  0LQ 

VHF

 

 

 

VHF

 

 

 

VHF

 

 

 

 

4

VHF VHF VHF VHF

Example 2

Analog input value: 300 (range 0 ...1000)

Periodic time T: 10 seconds

The digital output of the PWM function is 3 seconds high, 7 seconds low, 3 seconds high, 7 seconds low and continues in that pattern as long as parameter "En" = high.

(Q

0D[ 

$[  0LQ 

4

VHF

VHF

VHF

VHF

Calculation rule

Q = 1, for (Ax - Min)/ (Max - Min) of time period T, when Min < Ax < Max Q = 0, for PT - [ (Ax - Min) / (Max - Min) ] of periodic time T.

Note: Ax in this calculation refers to the actual value Ax as calculated using the Gain and Offset.

LOGO!

 

Manual, 04/2011, A5E03556174-01

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Siemens 6ED1050-1AA00-0BE8 manual Examples with Timing Diagrams
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6ED1050-1AA00-0BE8 specifications

The Siemens 6ED1050-1AA00-0BE8 is a versatile and essential component in industrial automation and control systems. Designed for a wide range of applications, this device is part of Siemens' extensive portfolio of automation products, renowned for their reliability and innovative technologies.

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