LOGO! functions

4.4 Special functions list - SF

4.4.18Analog threshold trigger

Short description

The output is set and reset at two configurable thresholds.

Symbol in LOGO!

Wiring

Description

 

$

Input Ax

Input Ax is one of the following analog signals:

$[

 

• 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 threshold

 

 

 

Range of values: ±20,000

 

 

 

Off: Off threshold

 

 

 

Range of values: ±20,000

 

 

 

p: Number of decimals

 

 

 

Range of values: 0, 1, 2, 3

 

 

Output Q

Q is set or reset by the threshold triggers.

* 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)".

Parameters On and Off

The On and Off parameters can be provided by the actual value of another already- programmed function. You can use the actual values of the following functions:

●Analog comparator (Page 218) (actual value Ax – Ay)

●Analog amplifier (Page 226) (actual value Ax)

●Analog multiplexer (Page 248) (actual value AQ)

●Analog Ramp (Page 251) (actual value AQ)

●Mathematic instruction (Page 265) (actual value AQ)

●PI controller (Page 256) (actual value AQ)

●Up/down counter (Page 201) (actual value Cnt)

LOGO!

 

Manual, 04/2011, A5E03556174-01

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Siemens 6ED1050-1AA00-0BE8 manual Analog threshold trigger, Gain and offset parameters
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