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Hello,

I need a proposal how to make TA for more than 99h.

Simple to have a service hours counter for blowers or etc.

When the blower starts - timer starts.

When it stops - timer stops.

I'll be glad if you have any ideas

 

Best wishes,

eng. Nikola Gramatikov

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Just have a 24 hour timer which increments a "Days" counter (or integer operand).

Or if your display must be in hours, then a 60 minute timer that increments an "Hours" counter (or integer operand).

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I just take a 6 min timer (time base) linked to contact (true for one scan then timer self resets) + (logical AND) with motor output contact then drive an INCREMENT DW FB. While output is true the DW (Uint) increases in tenths of hours. Add decimal point shift one left and you have HOBBS hour meter. A reset numeric can be triggered elsewhere in ladder to clear the time count. -dB

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