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Can I Set LOGO Memory as Retentive

Created by: Saan at: 7/9/2013 10:47 AM (10 Replies)

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7/9/2013 10:47 AM	Rate (0)
Saan Advanced Member Joined: 3/2/2012 Last visit: 12/8/2025 Posts: 5 Rating: (0)	Dear All Can I Set LOGO Memory as Retentive means If I set a M bit ON and power goes OFF will it retain its state or Not after power restoration. Kindly ans. Thanks & Regards Saan

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7/9/2013 11:00 AM	Rate (1)
William_B Posts: 5225 Rating: (1204)	Sir, Are you using a Set-Reset latch to change the state of the memory bit? Use the indirect method of setting the retentiveness in the latching relay block. Please view the image. Please let us know if this suggestion works for you. w Attachment retentive latch relay.jpg (1970 Downloads)
William_B Posts: 5225 Rating: (1204)
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This contribution was helpful to 1 thankful Users santhosh sundaram

7/9/2013 11:02 AM	Rate (0)
KM_AS Silver Expert Joined: 11/23/2011 Last visit: 1/12/2026 Posts: 202 Rating: (32)	Hello Saan, you can use for example a special function "pulse relay" after your M flag. When you doubleclick in the LOGO! Soft Comfort program on the pulse relay to open the block properties there is an checkbox "retentivity". After power restoration it retains its state. When you have other questions don't hesitate to ask. Greetings, KM_AS

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7/9/2013 11:02 AM	Rate (0)
Mc Muffin Posts: 495 Rating: (58)	If you set the retentivity in the block properties of e.g. a pulse relay then the LOGO! save the last state of this block in case of power off. You can simulate it in LOGO!Soft Comfort. There is a button that looks like two plugs which are connected in simulation mode. If you press this butten LOGO!SoftComfort simulates a power off.
Mc Muffin Posts: 495 Rating: (58)
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7/9/2013 11:06 AM	Rate (0)
Ste39 Posts: 4620 Rating: (710)	Hi Saan, Memory bits are not retentive, you must use a special function then double click on the block and mark retentive.
Ste39 Posts: 4620 Rating: (710)
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7/9/2013 12:25 PM	Rate (0)
Saan Advanced Member Joined: 3/2/2012 Last visit: 12/8/2025 Posts: 5 Rating: (0)	Dear All Thank you very much Sir I got the ans. How many Latching Relay can be use in a LOGO RC 12/24. Thanks & Regards Shaan

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7/9/2013 12:30 PM	Rate (0)
Saan Advanced Member Joined: 3/2/2012 Last visit: 12/8/2025 Posts: 5 Rating: (0)	Thanks

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7/9/2013 12:58 PM	Rate (0)
William_B Posts: 5225 Rating: (1204)	Saan Dear All Thank you very much Sir I got the ans. How many Latching Relay can be use in a LOGO RC 12/24. ..yes well -- it depends on the version of LOGO. The part number ends with an OBAx where x = version. View the attached image. The top portion you can select the hardware and see what resources are available. The bottom shows what the system tells you what has been used by your program, if you have selected hardware. Note that if you use "retentive" selection it will eat at the REM (memory), not just the function blocks used. Instead of giving all the answers to you.. experiment a bit with the selections and your program to get a feel for it. Have fun. w Attachment LOGO resources.jpg (1535 Downloads)
William_B Posts: 5225 Rating: (1204)
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7/9/2013 3:42 PM	Rate (0)
Toeternietoe Platinum Member Joined: 12/27/2006 Last visit: 11/17/2025 Posts: 1200 Rating: (116)	In LOGO!Soft Comfort: Press CTRL + H its same as > Tools > Select Hardware. Then you choice the LOGO you use, and you see a lot of info of the blocks, memory and so on of your LOGO!

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2/13/2017 2:41 PM	Rate (0)
Min_Moderator Posts: 4757 Rating: (122)	New question published by Poljo77 is split to a separate thread with the subject How can I make these addressees retentive in the LOGO memory?. Best regards Min_Moderator
Min_Moderator Posts: 4757 Rating: (122)
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