Internet PLC Forum

General => Technical support => Topic started by: vijay on August 10, 2003, 07:17:35 AM

Title: easy way for one shot ?
Post by: vijay on August 10, 2003, 07:17:35 AM

One of the missing features in Trilogy is a PULSEOUT command. Is there a simple way to implement a ONE SHOT timer ? I have got a solution with two timers but it is very complicated.
What I want to is set an OUTPUT for a specified number of seconds and then it should shut. The ONE SHOT should only repeat when the trigger relay changes state again.

Title: Re: easy way for one shot ?
Post by: support on August 13, 2003, 08:23:14 PM

This is really easy to implement in ladder logic. A screen shot of the circuit is as follow:

(http://www.tri-plc.com/trilogi/oneshot.gif)

You can download the "oneshot.pc5" from the following link:

http://www.tri-plc.com/trilogi/oneshot.zip.

Title: Re: easy way for one shot ?
Post by: support on August 13, 2003, 08:48:06 PM

If you want the oneshot output to turn OFF after the preset timer regardless of the logic level of input1, then you can connect input1 to a [DIFU] relay and use the relay to [Latch] the output. The output will only be latch again when input1 goes OFF and then ON again.