Digital Raising Edge using cfp-300

[M_Atif]

Hi,

Raising Pulse / Positive Pulse  and Falling Pulse/ Negative Pulse.

I put this dummy question different time in different ways but still there is no answer.

I am using cFP-300 (Digital input module). As in other PLC programming softwares there are options that they have Pulse option, whenever there is activity (acquisition) of data from field device, they can generate a Positive Rising Pulse if input goes High (1) and Negative Pulse, if input goes Low (0).

It is necessary for my projects as i have to activate my output based on the pulse i receive from field, my actions are on pulse monitoring not on continuous monitoring.

But i do't know how i can get this Rising or Falling Pulse from my cFP-300.

Hopefully i explained in detail.

[Devin_K]

M_Atif,

You can use a shift register and boolean logic to monitor changes in the digital input.  This will allow you to execute code whenever a rising or falling edge is seen.  I made up a quick example which shows this type of functionality:





Message Edited by Devin_K on 11-28-2007 02:24 PM