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s7 1200 and mm430 analog input

Created by: jnb at: 4/5/2014 10:32 AM (2 Replies)

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4/5/2014 10:32 AM

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Experienced Member

Joined: 7/23/2013

Last visit: 6/16/2023

Posts: 14

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Hi

I am beginner and this is my first time commissioning a VFD.

The mm430 is controlled only using analog inputs from the s7 1200 plc through a pid compact block (output address qw144).

The problem I face is I can enable the VFD to run but the frequency shows 0.00. The analog inputs are connected to terminals 10 and 11 ( Analog input 2)

The parameters I entered are as follows:

P0003	3
P0010	1
P0100	0
P0304	440
P305	136
P307	74.6
P310	50
P335	0
P640	110
P700	2
P756	0	0
P757	0	0
P758	0	0
P759	10	10
P760	100	100
P761	0	0
P1000	2
P1080	50
P1120	10
P1121	10
P1135	5
P1300	0
P1500	0
P1910	1
P3900	1

what do i need to change to send values from plc to mm430. Where Am I going wrong ? Should I change p1000 to 7 and/or anything else?

Thanks

5/11/2014 7:53 PM	Rate (0)
Vithani Platinum Expert Joined: 7/8/2009 Last visit: 6/7/2025 Posts: 1977 Rating: (479)	Yes P1000 - 2 is for AI 1 and P1000 - 7 for AI 2 Every thing else should be ok For troubleshooting, please check r752 for actual analog sensed by drive Also check p2000
	Last edited by: Vithani at: 5/11/2014 7:55 PM I dont Like people driving Fast, thats the reason I overtake them ;)
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5/13/2014 1:56 PM	Rate (0)
jnb Experienced Member Joined: 7/23/2013 Last visit: 6/16/2023 Posts: 14 Rating: (0)	Thanks for the help. Found the problem. the polarity for the ADC input was reversed rookie mistake Thanks again. Regards Jassim

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s7 1200 and mm430 analog input

Created by: jnb at: 4/5/2014 10:32 AM (2 Replies)

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3 Entries

jnb

Vithani

Last edited by: Vithani at: 5/11/2014 7:55 PM

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