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SINAMICS V20 communication problem

4/2/2024 12:11 PM	Rate (0)
RM2024 Joined: 2/12/2024 Last visit: 12/5/2024 Posts: 7 Rating: (0)	Good morning, I've wired the SINAMICS V20 as depicted in the screenshot below, connected to an S7-1200 CPU. However, when I send a 20Hz signal from the PLC, the VFD fails to read it. Strangely, it only operates at 50Hz regardless of the analog value set in the PLC when the enable signal is 1. can someone give me some help please? Attachment Capture d'écran 2024-04-02 131007.png (356 Downloads)

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4/4/2024 12:05 PM	Rate (0)
SINAMICS_TO Bronze Member Joined: 4/24/2008 Last visit: 12/13/2024 Posts: 213 Rating: (16)	I suggest to use one of the examples from V20. Like this one https://support.industry.siemens.com/cs/ww/de/view/109480894/en

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4/5/2024 1:58 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 1/10/2025 Posts: 5980 Rating: (823)	Hello M2024, you can use macros of V20 to set up the parameters to use V20 in predefined setups. You can also use this predefined settings and adapt them according to your needs. See section 5.5.1.3 of V20 operating instruction manual, i.e. macro Cn002. https://support.industry.siemens.com/cs/ww/en/view/109824500
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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4/26/2024 10:15 AM	Rate (0)
RM2024 Joined: 2/12/2024 Last visit: 12/5/2024 Posts: 7 Rating: (0)	But it should work without using USS if I'm just sending wired voltage from the plc right?

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4/26/2024 10:23 AM	Rate (0)
RM2024 Joined: 2/12/2024 Last visit: 12/5/2024 Posts: 7 Rating: (0)	the external control can be a plc? because I'm already using this configuration, but as I explained whenever I have the digital input on/off= 1 the VFD works in 50Hz even if i'm sending 5V

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4/30/2024 9:15 AM	Rate (0)
RM2024 Joined: 2/12/2024 Last visit: 12/5/2024 Posts: 7 Rating: (0)	IT works ! we should configure P0757 To P0761 and P2000 properly.

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