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Siemens logo!, Frequency converter and a three phase motor.

4/5/2024 8:43 AM	Rate (0)
AutoGen_2437244 Joined: 4/5/2024 Last visit: 4/11/2024 Posts: 2 Rating: (0)	I have a group project where we are using a frequency converter with a siemens logo plc and a potentiometer to control the frequency of a three phase motor, but we have no idea to program this! Could anyone help?

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4/5/2024 9:56 AM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 11/19/2024 Posts: 34240 Rating: (4263)	Which LOGO! exactly? Not every LOGO! has analog inputs. If the LOGO! has no analog inputs then need you a analog input expansion module AM2. Have you a analog output module?

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4/5/2024 10:26 AM	Rate (0)
Mr.V Silver Member Joined: 6/19/2019 Last visit: 10/29/2024 Posts: 705 Rating: (76)	Here is not much information, why potentiometer need connect to LOGO and then it must control VFD? i would connect potentiometer directly to VFD. Just write LOGO control logic when to start when to stop the VFD Write full information what need to control how to control and then maybe someone answer to your problem

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4/5/2024 5:42 PM	Rate (0)
Otobit Experienced Member Joined: 6/20/2010 Last visit: 11/13/2024 Posts: 96 Rating: (0)	It is not necessary to install a potentiometer, you would also have to put a voltage divider, you can generate analog output through an output card and with this program created in UDF. Attachment UDF_CURSORES_potenciometro.zip (360 Downloads)

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4/9/2024 9:00 AM	Rate (0)
AutoGen_2437244 Joined: 4/5/2024 Last visit: 4/11/2024 Posts: 2 Rating: (0)	We are using the Siemens plc with the name of ( Siemens LOGO! Series Logic Module for Use with LOGO! 8.4, 24 V dc Supply, Relay Output, 8-Input, Digital Input We need to make a logo program of the vfd working as a soft starter with a potentiometer and a 230v three phase motor, we don't have much time and need help asap!

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