Many thanks Marcjan.

Now, the mysterious part I need a clarification on is the difference between you calling FC 105 and me calling FC 105.

Your FC 105 has an input called BIPOLAR, I do not have that if you look at my attachment again. What I have is KNKD. I have chosen the CPU313C. I know it has nothing to do with it. Am I doing something wrong? Has it anything to do with different version of Step7 software

To both Marcjan and hdhosseini,

Now that we have developed the timer program which would work by feeding time value from another control system continuously.

Do you know if once a time value is fed and the timer is activated, then the operator punches a new time value which could be lower or higher than the current time value. What happens to the functioning of the timer? Will it continue to generate pulse output?

Thanks,

Humble

Hello dhosseini,
I had tried what you did post in the attachment "convert.jpg", ...

thank you hdhosseini for your time and efforts
if i need to control the timing value , time base via HMI using IEC timers based on FC40
what should i do to control the timing in minutes , just write the no. of minutes "without s5t# format" in I/O field and show the result of time output in output field in HMI

thanks in advance