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Retaining vm setpoints on a logo power down

Created by: Waylon sims at: 5/20/2019 8:56 AM (8 Replies)

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5/20/2019 8:56 AM	Rate (0)
Waylon sims Posts: 12 Rating: (0)	Hi How is the easiest way to retain the vm setpoints when the power is removed from the logo ? [snip] Thanks waylon sims
Waylon sims Posts: 12 Rating: (0)	Last edited by: Jen_Moderator at: 05/20/2019 11:14:45 Division of questions into seperate topics.
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5/20/2019 9:37 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/17/2026 Posts: 36469 Rating: (4552)	Waylon sims How is the easiest way to retain the vm setpoints when the power is removed from the logo ? The VW area is not retentive. Do not read the setpoint in the LOGO! Program with an analog network input, but refer the setpoint to a parameter of a mathematical instruction using Parameter-VM-Mapping.

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5/20/2019 9:59 AM	Rate (0)
Waylon sims Posts: 12 Rating: (0)	do you have an example on the parameter mapping and math instriction
Waylon sims Posts: 12 Rating: (0)
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5/20/2019 10:18 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/17/2026 Posts: 36469 Rating: (4552)	Waylon sims do you have an example on the parameter mapping and math instriction Suppose the setpoint is stored in the VW100, see attachment. Tools > Parameter-VM-Mapping Attachment Untitled.PNG (718 Downloads)

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This contribution was helpful to 2 thankful Users Vgmar User6996

5/21/2019 5:40 AM	Rate (0)
Waylon sims Posts: 12 Rating: (0)	does this work when the power is removed from the logo ? i tested it but found the setpoint didnt save Attachment grow room.zip (306 Downloads)
Waylon sims Posts: 12 Rating: (0)
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5/21/2019 7:12 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/17/2026 Posts: 36469 Rating: (4552)	For the three setpoints in B004, B006 and B011 does it work. I have test it.

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5/21/2019 12:50 PM	Rate (0)
Toeternietoe Platinum Member Joined: 12/27/2006 Last visit: 11/17/2025 Posts: 1200 Rating: (116)	Can you explain what you want? In the VM memory are value's etc. that becoms from other places. That can be blocks etc in the same LOGO but also value of other LOGOs, ore even other equipment, like a HMI or PLC.

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5/23/2019 3:56 AM	Rate (0)
Waylon sims Posts: 12 Rating: (0)	When the power is removed from the logo then reinstalled the vm values and in from before the power was removed the set points are in lwe on the web I have confirmed they are not saving every time i removed the power setpoints in the vm are 0 and it looses the set ip address i need to fix this asap the customer has installed $80k of seed in the room controlled by the logo
Waylon sims Posts: 12 Rating: (0)
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5/23/2019 4:10 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/17/2026 Posts: 36469 Rating: (4552)	Then you should also give more information. How should I judge remotely such facilities and programs, if I does not know everything? That the LOGO! the IP address loses, I think simply not possible. That suggests other things. Which LOGO! is it exactly? Please write the exact order number and the FS version. Is perhaps an SD card with an old program state plugged in the LOGO!, where the setpoints were still all at 0? And an other IP address? The procedure I have described to you works 100%. If you write the setpoints in a parameter of the mathematical instruction, they are stored in the flash memory of the LOGO!. And are thus voltage failure safe.

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