I have a

LOGO 12/24 with analog expansion module

An hydraulic movable “shuttle car”

An analog position sensor to read the position of the “shuttle car” position (0-10 volt)

and I am trying to do the following:

When a user double tab a input (button) within 2 seconds the following must happen:

The “shuttle car” must run thru center (pre calibrated, stored analog value) a stop at the same distance from center, but on the other side. The user will press can press on the button that starts the shuttle car in the right direction

Example 1

Shuttel car is at value 600

Center point is stored as 500

Input 1 is clicked 2 times within 2 seconds

Shuttel car must now move to analog value 400 is reached (500 – (600-500)) by turning on X1 until reached

If button 2 is clicked 2 times nothing happens, except 2 short movement toward analog value 1000 (Since it is already on that side of center)

Example 2:

Shuttel car is at value 123

Center point is stored as 423

Input 2 is clicked 2 times within 2 seconds

Shuttel car must now move to analog value 723 (423 + (423-123)) by turning on X2 until reached

If button 1 is clicked 2 times nothing happens, except 2 short movement toward analog value 0 (Since it is already on that side of center)

Hope you can help, I can make it in C++ and other program, but now I only have the LOGO 8.4

PLS see atached drawing

Hello tue_andersen,

I've added something quickly. It's not complete, but I think it solves most of the problems.

As the middle (pre-calibrated, saved analog value) is not described further, I've labeled it AI2 in the program.

I can't follow you with button 2, though. But it shouldn't be any more difficult for you to be able to pick up the direction from B004 and B005.

Regards Ella_68

(translated with google)

Thanks ALOT

I have made attached from your input... It might help somebody else :-)

Have a great day