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problem with setpoint speed

Created by: AutoGen_3834302 at: 10/8/2024 6:12 AM (8 Replies)

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10/8/2024 6:12 AM	Rate (0)
AutoGen_3834302 Posts: 6 Rating: (0)	good afternoon, I don't know how to save the set speed of revolutions on my frequency converter g120 with each switch on, because the basic start value for each stop of the frequency converter is 0, I want to set 800 1/min and with a maximum value of 1500 1/min
AutoGen_3834302 Posts: 6 Rating: (0)
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10/8/2024 9:45 AM	Rate (0)
Tractor Gold Expert Joined: 3/27/2008 Last visit: 8/23/2025 Posts: 1212 Rating: (148)	Look at the 'Motor Potentiometer Function', here the last setpoint can be saved, and at next switch on the drive will go to that setpoint. Tractor
	Tractor
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This contribution was helpful to 1 thankful Users AutoGen_3834302

10/8/2024 1:11 PM	Rate (0)
AutoGen_3834302 Posts: 6 Rating: (0)	I do not use a potentiometer. Is there a parameter that can be used to change the setpoint value rotation? The minimum and maximum speed values are entered correctly
AutoGen_3834302 Posts: 6 Rating: (0)
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10/8/2024 1:59 PM	Rate (0)
Tractor Gold Expert Joined: 3/27/2008 Last visit: 8/23/2025 Posts: 1212 Rating: (148)	Have a look here: SINAMICS G120 (CU2x0x-2): Extended functions of motorized potentiometer (MOP) 'Motor Potentiometer' Is a term used by Siemens, using two digital inputs to set a speed: A contact closure at a digital input can increase the speed, open the input and the increasing speed stops or is held at that point. The second digital input when closed will decrease the speed or frequency, and hold that frequency when opened. Parameters: P1030, configuration of the MOP ( Motor Potentiometer). Saving the setpoint, configure the ramp etc. P1035, signal source for 'increase speed'. P1036, signal source for 'decrease speed'. P1037, Maximum setpoint P1038, Minimum setpoint. Tractor
	Last edited by: Moderator_Lan at: 10/08/2024 14:04:11 link optimized Tractor
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10/8/2024 2:26 PM	Rate (0)
AutoGen_3834302 Posts: 6 Rating: (0)	thanks for the explanation, I want to show the problem more clearly on the photo. The Setpoint values say "0" although it should be "1500" as indicated in the parameters. I checked all the parameter values, they are correct Attachment IMG_20241008_172521.jpg (210 Downloads)
AutoGen_3834302 Posts: 6 Rating: (0)
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10/8/2024 3:52 PM	Rate (0)
Tractor Gold Expert Joined: 3/27/2008 Last visit: 8/23/2025 Posts: 1212 Rating: (148)	Hi showing in the pic is SP (Set Point) "zero rpm". From this it looks as if the 'run command' has not been issued? Tractor
	Tractor
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10/8/2024 4:30 PM	Rate (0)
AutoGen_3834302 Posts: 6 Rating: (0)	була подана команда «старт», але відповіді немає
AutoGen_3834302 Posts: 6 Rating: (0)
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10/9/2024 6:52 AM	Rate (0)
Moderator_Lan Moderator Joined: 7/30/2024 Last visit: 8/29/2025 Posts: 936 Rating: (16)	Hello AutoGen_3834302, Please try to discuss your question in English language. This is an international community and we try to focus on one language. Posting in English will help to generate more replies to your question. This is the translation of your post: AutoGen_3834302 the "start" command was sent, but there is no response Kind regards, Moderator_Lan

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10/9/2024 7:30 AM	Rate (0)
AutoGen_3834302 Posts: 6 Rating: (0)	I use a frequency converter g120, after a short circuit on the motor and replacing the motor with another one, I noticed that the frequency converter stopped working in automatic mode, while the central processor siemens s7-300 gives the "start" command. At the same time, I noticed that in automatic mode, the SetPoint value is equal to 0 from the time of the "stop" command, although on other frequency converters this value is greater than 0. There are no problems with the connection to the g120, it works through the PLC in manual mode, all the available parameters on the frequency converter are correct, but the p1042 parameters require level 4 permission, which I do not have. I don't know how to solve this problem
AutoGen_3834302 Posts: 6 Rating: (0)	Last edited by: AutoGen_3834302 at: 10/09/2024 08:14:35
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