[?]: DEFINE DIRECTION ROTATION OF GEAR

[macminh]

i used CP1L and one proximity sensor.
Now i want to write a programmer to define direction rotation of gear.
But i don't know how can i write.
Note:i want use one proximity sensor only not two proximity sensor.
(it is easy to write the programmer If i use two proximity to define direction rotation of gear)
Now i need you help me.

[Rune]

Is this even possible ? If i should make a safe detektion, I would spent 2 sensors, but please let me know if you solve the problem !

[CoMod]

From Simatic Help File

Example 2: Detecting the Direction of a Conveyor Belt

The following figure shows a conveyor belt that is equipped with two photoelectric barriers (PEB1 and PEB2) that are designed to detect the direction in which a package is moving on the belt. Each photoelectric light barrier functions like a normally open contact.



Ladder Logic Program for Detecting the Direction of a Conveyor Belt

Network 1: If there is a transition in signal state from 0 to 1 (positive edge P) at input I 0.0 and,
at the same time, the signal state at input I 0.1 is 0,
then the package on the belt is moving to the left.



Network 2: If there is a transition in signal state from 0 to 1 (positive edge P) at input I 0.1 and,
at the same time, the signal state at input I 0.0 is 0,
then the package on the belt is moving to the right.
If one of the photoelectric light barriers is broken, this means that there is a package between the barriers.



Network 3: If neither photoelectric barrier is broken, then there is no package between the barriers.
The direction pointer shuts off.

[macminh]

From Simatic Help File
...

i want to use one proximity sensor to define the direction rotation of gear

[Rune]

Hi Macminh

I think I have a suggestion for you, but it requires a speciel detection device for your sensor, when using only a 0 / 1 output. You need a disc with 3 "tabs" on. 1 long, and 2 or 3 short, and perhaps differet distance betvens them all, then you should be able to write a program, using some timers...

Dont know how to insert a picture, but please let me know if you have any questions.

[macminh]

Hi Macminh

I think I have a suggestion for you, but it requires a speciel detection device for your sensor, when using only a 0 / 1 output. You need a disc with 3 "tabs" on. 1 long, and 2 or 3 short, and perhaps differet distance betvens them all, then you should be able to write a program, using some timers...

Dont know how to insert a picture, but please let me know if you have any questions.

thank you for reply, but i understand not more.you can explain more to me.
you can guide me manufacture it

[Rune]

The solution i suggested is the same at shown in picture no. 4. From siemens eksample. One sensor, and differet detection points on a disc on the output shaft. The program, shold then be able to detect way of rotation, because you have different timers, between the detection points on the disc.

[macminh]

The solution i suggested is the same at shown in picture no. 4. From siemens eksample. One sensor, and differet detection points on a disc on the output shaft. The program, shold then be able to detect way of rotation, because you have different timers, between the detection points on the disc.

i want to count the number of gear and detect way of rotation.
With your suggestion i detect the way of rotation only,count the number of gear is not enough

[macminh]

i want to count the number of gear and detect way of rotation.

Which the rotational speed and diameter?

i don't know the rotation speed, but it is slow
the diameter is 40 centimetre