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Logic for RPM ,Direction of rotation

Created by: 1986MRPATTATHIL at: 3/10/2022 10:13 PM (10 Replies)

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3/10/2022 10:13 PM	Rate (0)
1986MRPATTATHIL Regular Member Joined: 3/23/2018 Last visit: 7/14/2025 Posts: 20 Rating: (0)	Hi Gurus out there... Can anybody share a logic to find RPM and Direction of rotation of something using Proximity sensors. Thanks.

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3/11/2022 5:05 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/2/2025 Posts: 35912 Rating: (4496)	The gurus can't help. Why? You don't wrote which PLC you use. We have no crystal ball ...

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This contribution was helpful to 3 thankful Users Jen_Moderator jacek d Ella_68

3/11/2022 1:43 PM	Rate (0)
1986MRPATTATHIL Regular Member Joined: 3/23/2018 Last visit: 7/14/2025 Posts: 20 Rating: (0)	Offcourse there's one crystal ball here and that's you ..😉..for your Information i use Logo 8.
	Last edited by: 1986MRPATTATHIL at: 03/11/2022 13:46:33 Last edited by: 1986MRPATTATHIL at: 03/11/2022 13:54:15
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3/11/2022 6:06 PM	Rate (0)
Ella_68 Gold Member Joined: 6/11/2019 Last visit: 8/31/2025 Posts: 2623 Rating: (122)

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3/12/2022 9:19 PM	Rate (0)
1986MRPATTATHIL Regular Member Joined: 3/23/2018 Last visit: 7/14/2025 Posts: 20 Rating: (0)	Hi ixo65 i mentioned which controller I am using...☹️

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3/14/2022 2:34 PM	Rate (0)
Mr.V Silver Member Joined: 6/19/2019 Last visit: 8/22/2025 Posts: 743 Rating: (79)	Hello, If you seach in this forum already exist topics how measure RPM with LOGO!, try use seach field :) Also you can see video in Youtube there are examples :) link for one video how to measure frequency maybe this help you link HERE 1986MRPATTATHIL Hi ixo65 i mentioned which controller I am using...☹️
	Last edited by: Jen_Moderator at: 03/15/2022 10:13:58 Embedded video.
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This contribution was helpful to 1 thankful Users 1986MRPATTATHIL

3/14/2022 3:19 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/2/2025 Posts: 35912 Rating: (4496)	Only Logo 8 is not enough information. Please write the complete article number and the firmware version.

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This contribution was helpful to 1 thankful Users Ella_68

6/8/2025 4:19 AM	Rate (0)
1986MRPATTATHIL Regular Member Joined: 3/23/2018 Last visit: 7/14/2025 Posts: 20 Rating: (0)	Hi all, Can i use this logic to calculate RPM. I3- Proximity sensor input. Engine shaft has four sensing block( In an complete rotation proximity sensor will produce 4 pulses) Value dsplayed= (Counter value/4)x60 (Each second counter is reset) out Attachment LOGIC.png (198 Downloads)
	Last edited by: 1986MRPATTATHIL at: 06/08/2025 04:23:20 Last edited by: 1986MRPATTATHIL at: 06/08/2025 04:28:19
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6/8/2025 6:16 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/2/2025 Posts: 35912 Rating: (4496)	What is the expected speed? There are two ways to determine the speed. For low speeds, one option is better, for higher speeds, the other option is better.

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6/8/2025 3:16 PM	Rate (0)
1986MRPATTATHIL Regular Member Joined: 3/23/2018 Last visit: 7/14/2025 Posts: 20 Rating: (0)	The Shaft maximum RPM is 1500. Also please check the attached image.I think this is simple and efficient logic.If anybody has a better logic please suggest or help. Attachment logic.png (198 Downloads)
	Last edited by: 1986MRPATTATHIL at: 06/08/2025 16:20:04
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