STL Timer Instructtion (Step 7)

Hi,

I have a question about a Timer

When u write this:

A Input_1
A Input_2
L S5T#5s
SD T1

A T1
= Q0.1


Input Q0.1 comes high when Both inputs are 5 seconds high. RLO is High => SD1 Is setted.

The time 5s is loaded before SD T1. Should it work in the inverse way also ?

A Input_1
A Input_2
SD T1
L S5T#5s

A T1
= Q0.1


What is the best way to work ? I never tried the second method.

Combo said:

Should it work in the inverse way also ?

Click to expand...

Generally not. (however there're very specific circumstances that it will)

Combo said:

I never tried the second method.

Click to expand...

And better never try it.

With the instruction SD T1 you start an on-delay timer with the time information stored in accu 1. If you would load the time value after the SD T1 instruction, there's no telling what time setting the timer will use. Conclusion: don't ever use that second method.

Kind regards,