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Run micromaster 420 via PWM, how to configure

Created by: Milosh at: 4/30/2012 4:54 PM (9 Replies)

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4/30/2012 4:54 PM	Rate (0)
Milosh Silver Member Joined: 8/16/2010 Last visit: 6/18/2025 Posts: 640 Rating: (12)	Hi all. How to configure micromaster 420 inverter to work with pulses, PWM output from S7-1200. Which parameters I need to configure? Which frequency I need to use? Regards, Miloš

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4/30/2012 7:30 PM	Rate (0)
Graeme Platinum Expert Joined: 6/4/2008 Last visit: 8/5/2025 Posts: 1518 Rating: (327)	Hi, this is not possible. The Micromaster range of drives create their own pulse waveforms internally. All the user needs to do is to give the drive either digital input commands, or via Profibus communications. Also, the drive needs a setpoint from Profibus, Analogue input or via fixed frequencies which can also be selected digitally. Regards, Graeme

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5/4/2012 2:12 PM	Rate (0)
Milosh Silver Member Joined: 8/16/2010 Last visit: 6/18/2025 Posts: 640 Rating: (12)	Finally work. I use PWM outputs from PLC, and passive filter. Now freq. regulators works good. I set PWM cycle time to 720 us about 1,4kHz.

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5/5/2012 1:16 AM	Rate (0)
Graeme Platinum Expert Joined: 6/4/2008 Last visit: 8/5/2025 Posts: 1518 Rating: (327)	Hi, I'm glad you got your application working, but please describe your setup so we can all understand and maybe learn something. Regards, Graeme

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This contribution was helpful to 1 thankful Users playerslight

5/5/2012 7:09 AM	Rate (0)
Milosh Silver Member Joined: 8/16/2010 Last visit: 6/18/2025 Posts: 640 Rating: (12)	OK. TIA Settings. 1. Enable PWM 2. Use Microseconds as timebase 3. Cycle time 720 us 4. format Thousends 5. Q0.0 is pwm output Micromaster settings: 1. on pin 3 ADC via passive filter comes Q0.0 output 2. on pin 5 q0.1 as run command 3. Parameter P0700=2, P0701=1, P0725=PNP

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This contribution was helpful to 1 thankful Users Graeme

5/5/2012 8:50 AM	Rate (1)
Vithani Platinum Expert Joined: 7/8/2009 Last visit: 6/7/2025 Posts: 1977 Rating: (479)	Milosh OK. TIA Settings. 1. Enable PWM 2. Use Microseconds as timebase 3. Cycle time 720 us 4. format Thousends 5. Q0.0 is pwm output Micromaster settings: 1. on pin 3 ADC via passive filter comes Q0.0 output 2. on pin 5 q0.1 as run command 3. Parameter P0700=2, P0701=1, P0725=PNP Do you mean using PWM output as setpoint?
	I dont Like people driving Fast, thats the reason I overtake them ;)
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This contribution was helpful to 1 thankful Users Graeme

5/5/2012 9:01 AM	Rate (0)
Milosh Silver Member Joined: 8/16/2010 Last visit: 6/18/2025 Posts: 640 Rating: (12)	Yes.

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This contribution was helpful to 1 thankful Users Graeme

5/5/2012 1:16 PM	Rate (0)
Graeme Platinum Expert Joined: 6/4/2008 Last visit: 8/5/2025 Posts: 1518 Rating: (327)	Aah, that makes sense now. Thanks for sharing!!

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1/13/2015 5:50 PM	Rate (0)
tony311 Posts: 31 Rating: (0)	Pasive Filter?
tony311 Posts: 31 Rating: (0)
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2/6/2015 3:05 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4760 Rating: (122)	New question published by umair6646 is split to a separate thread with the subject MM420 using fixed frequencies, by using 3 digital inputs. Best regards Min_Moderator

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