Communication Status

Omar Henry · Feb 2, 2013

Hi ,

I want to monitor a third party panel heart beat in a pattern 2 sec ON then 2 SEC OFF. If the pattern of signal does not change in 10 sec it should alarm as communication fault.

Please help me how to write this in Functional Block diagram.

Looking for a help urgently.

KalleOlsen · Feb 3, 2013

Hi, and welcome to the forum!

What kind of PLC do you use?

Kalle

moggie · Feb 3, 2013

Simple version using S7 - modify to suit.

SHKODRAN · Feb 3, 2013

Another S7 version without memory usage:

Code:

L     P##OB1_DATE_TIME
      LAR1  
      A      [AR1,P#6.7]
      =     #Heart_Beat

      A     #Heart_Beat
      FR    T    250
      L     S5T#10S
      SD    T    250                    // Timer Delay Positive Edge
      AN    #Heart_Beat
      FR    T    251
      L     S5T#10S
      SD    T    251                    // Timer Delay Negative Edge
      A     T    250
      O     T    251
      JNB   YB00
      SET   
      S     #Set_Alarm
YB00: NOP   0

Communication Status

Omar Henry

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KalleOlsen

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moggie

Lifetime Supporting Member

SHKODRAN

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