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VFD Analog OUT

Created by: TOS133 at: 12/15/2021 3:39 PM (7 Replies)

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12/15/2021 3:39 PM	Rate (0)
TOS133 Member Joined: 12/15/2021 Last visit: 1/3/2022 Posts: 9 Rating: (0)	Hello, how can I automaticdrive VFD with Logo? PI controller need SP/PV. In my case there is no sensor or any measurment signal. I need VFD to drive my motor as automatic loop. 1 min full speed, 1min 30% speed, 1min 70%.... Any idea? Thank you! all best t

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12/15/2021 3:45 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 1/25/2025 Posts: 34557 Rating: (4313)	You can use analog MUX. PI contoller without feedback signal is not possible.
	Last edited by: ixo65 at: 12/15/2021 15:46:06
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This contribution was helpful to 1 thankful Users TOS133

12/15/2021 4:24 PM	Rate (1)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 1/25/2025 Posts: 34557 Rating: (4313)	In attachment a simple example. Attachment Variabel_setpoint_with automatic_loop_0BA8.Standard.zip (565 Downloads)

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This contribution was helpful to 1 thankful Users TOS133

12/15/2021 5:31 PM	Rate (0)
TOS133 Member Joined: 12/15/2021 Last visit: 1/3/2022 Posts: 9 Rating: (0)	ixo65 In attachment a simple example. ixo65 thank you! There are only 4 setpoints? What if I need 10 or more? Is it posible? And slowly up an down? Slowly from 300-1000 and backwards... All best! t
	Last edited by: TOS133 at: 12/15/2021 17:47:22
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This contribution was helpful to 1 thankful Users ixo65

12/15/2021 6:59 PM	Rate (0)
TOS133 Member Joined: 12/15/2021 Last visit: 1/3/2022 Posts: 9 Rating: (0)	ixo65 In attachment a simple example. There are only 4 setpoints? What if I need 10 or more? Is it posible? And slowly up an down? Slowly from 300-1000 and backwards... All best! t

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12/15/2021 7:04 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 1/25/2025 Posts: 34557 Rating: (4313)	Slowly is relative ... There's block with a ramp function. And more then 4 setpoints are possible. See this topic: Time varing analogue output profile

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This contribution was helpful to 1 thankful Users TOS133

12/15/2021 7:40 PM	Rate (0)
TOS133 Member Joined: 12/15/2021 Last visit: 1/3/2022 Posts: 9 Rating: (0)	ixo65 Slowly is relative ... There's block with a ramp function. And more then 4 setpoints are possible. See this topic: Time varing analogue output profile Thank you! I am all in to it know. Great support! all best t

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12/15/2021 7:46 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 1/25/2025 Posts: 34557 Rating: (4313)	Here's a simple example for the ramp function. You can change the speed in the parameter "Change of speed". - Value higher > changig speed faster. - Value lower > changig speed slower. Note: The speed in the simulation is not the same as in a real LOGO!. Attachment Simple_example_ramp_function_0BA8.Standard.zip (578 Downloads)

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