LOGO! functions

4.4 Special functions list - SF

4.4.19Analog differential trigger

Short description

The output is set and reset depending on a configurable threshold and a differential value.

Symbol in LOGO!

Wiring

Description

 

 

 

Input Ax

Input Ax is one of the following analog signals:

$[

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• AI1 to AI8 (*)

˂

4

 

3DU

 

• AM1 to AM6 (if 0BA6) or AM1 to AM16 (if 0BA7)

 

 

 

 

 

 

 

 

 

 

 

• NAI1 to NAI32 (if 0BA7)

 

 

 

 

• AQ1 to AQ2

 

 

 

 

• NAQ1 to NAQ16 (if 0BA7)

 

 

 

 

• Block number of a function with analog output

 

 

 

 

 

 

 

 

Parameter

A: Gain

 

 

 

 

Range of values: ±10.00

 

 

 

 

B: Zero offset

 

 

 

 

Range of values: ±10,000

 

 

 

 

On: On/Off threshold

 

 

 

 

Range of values: ±20,000

 

 

 

 

Δ: Differential value for calculating the off parameter

 

 

 

 

Range of values: ±20,000

 

 

 

 

p: Number of decimals

 

 

 

 

Range of values: 0, 1, 2, 3

 

 

 

Output Q

Q is set or reset, depending on the threshold and

 

 

 

 

difference values.

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

Gain and offset parameters

Please note the information on gain and offset parameters in topic "Calculating the gain and offset of analog values (Page 154)".

Parameter p (number of decimals)

Applies only to the display of On, Off and Ax values in a message text.

Timing diagram A: Function with negative difference Δ

2Q

2II 2Q˂

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4

 

LOGO!

216

Manual, 04/2011, A5E03556174-01

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Image 216
Siemens 6ED1050-1AA00-0BE8 manual Analog differential trigger, Timing diagram a Function with negative difference Δ
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