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Inst Tools > Blog > Control Systems > Alarm Simulator for Annunciator Logic

Alarm Simulator for Annunciator Logic

Last updated: September 22, 2021 7:28 pm
Editorial Staff
Control Systems Excel Tools
8 Comments
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This Alarm Simulator Excel Spreadsheet helps you to simulate an alarm and useful for learning its basic logic.

annunciator-alarm-simulator

This excel simulates alarm logic used in alarming systems such as fire alarms, intruder alarms and process alarms in a process plant. The circuit is a combination of logic gates, SR flip flops and an oscillator.

The components labelled ‘X’ are NOT gates and the device marked with an UP arrow is a positive edge trigger.

DOWNLOAD ALARM SIMULATOR -1

DOWNLOAD ALARM SIMULATOR -2

Password : instrumentationtools.com

Note: Enable Excel Macros in order to work the simulator properly.

The alarm logic is as follows:

1. The circuit is started when powered up by pressing the ‘Turn Power On’ button.

2. An alarm event, created by pressing the ‘Trigger Alarm’ button generates an audio alarm and a flashing visual alarm. Examples of alarm events in real life could be detection of smoke or increasing in the temperature of a reactor.

3. The audio alarm is silenced by either pressing the ‘Silence’ or ‘Acknowledge’ buttons or when the alarm condition is cleared by pressing the ‘Clear Alarm’ button.

4. The visual alarm keeps flashing till acknowledged by pressing the ‘Acknowledge’ button. If the alarm condition remains, the visual alarm remains on when acknowledged. It clears when the alarm is acknowledged and cleared.

5. The circuit is powered off when the ‘Turn Power Off’ button is pressed.

The circuit is animated, and the various connections show the energized (logic state 1) and de-energized (logic state 0) states. Electrical convention is followed, green colour indicates the de-energized state and red indicates the energized state.

Also Read : What is a Inductive Proximity Switch ?

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8 Comments
  • Senthil says:
    June 25, 2015 at 8:42 am

    Simulator was working excellent. Thanks for sharing.

    Reply
  • shazly says:
    November 22, 2015 at 2:33 pm

    please what is the password for alarm simulation sheet

    Reply
    • S Bharadwaj Reddy says:
      November 22, 2015 at 3:30 pm

      hi, Password: instrumentationtools.com

      Reply
  • Shridhar says:
    February 26, 2016 at 9:00 am

    S Bharadwaj Reddy can I get your personal mail ID or contact number.

    Reply
    • S Bharadwaj Reddy says:
      February 26, 2016 at 9:19 am

      Mail me at [email protected]

      Reply
  • mohd says:
    March 13, 2016 at 8:07 pm

    sir may i know y it is not installing in my 64 bit laptop do we need any other configracation

    Reply
    • S Bharadwaj Reddy says:
      March 14, 2016 at 3:43 am

      Hello, It is a Excel file only. So Please check your Ms-office software. Thanks

      Reply
  • arif says:
    November 21, 2022 at 8:04 pm

    kindly send password of simulator rar files

    Reply

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