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General => Technical support => Topic started by: dyelinbo on October 25, 2002, 03:27:16 AM

Title: Flasher
Post by: dyelinbo on October 25, 2002, 03:27:16 AM

???Newbe...  Ladder logic to create flashing (1 sec. on, 1 sec. off) output.

Title: Re: Flasher
Post by: dyelinbo on October 25, 2002, 04:52:20 AM

OK, OK. It was way to easy.

I simply inserted a Special Bit 1.0 s Clock Pulse between my existing input and output. Light now blinks at a one second rate.

I.E. Select circuit to edit. Insert a NO contact (1) and for the label, arrow to the "Special Bit" label (located between Counters and Inputs) and select the time you desire.

Title: Re: Flasher
Post by: support on October 27, 2002, 02:26:56 PM

That's right, you have found the simplest method of generating a "heartbit" output signal which is to use the built-in clock pulses. If you are using the M-series PLC You could also use a self-resetting timer to trigger a custom function and put a "ToggleIO" command to toggle an output to ON and OFF every time the timer times out.

You could also use two timers to produce different ON and OFF time duration if the standard clock pulse does not meet your requirement.