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Crane Hoist Application

Created by: Shahide043 at: 5/13/2014 10:26 AM (7 Replies)

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5/13/2014 10:26 AM	Rate (0)
Shahide043 Posts: 57 Rating: (0)	Hi Everybody, I am commissioning a Sinamics S-120 Drive with CU 320-2DP for Crane hoist application. Starting is smooth but at the time of stopping the load is descending down by few inches and then stops but not stopping at actual stoping point. Hence i need help to resolve the problem. Thanks & regards
Shahide043 Posts: 57 Rating: (0)
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5/13/2014 12:38 PM	Rate (0)
Deleted User Posts: 767 Rating: (69)	Hello Shahide043, From your description, the brake may not be activated completely to hold load against gravity before drive system stops providing enough current to provide motor torque. Recommend determining closing time for brake from manufacturer data specification to help estabish amount of time needed for brake to close fully, Best Regards, Deputy
Deleted User Posts: 767 Rating: (69)
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5/13/2014 1:08 PM	Rate (0)
Graeme Platinum Member Joined: 6/4/2008 Last visit: 10/4/2024 Posts: 1497 Rating: (324)	Yep, exactly as Deputy described, you need to determine brake closing time from data sheet or by experiment. If you increase the brake closing time delay in P1217 (Normally, no more than double is required), this gives the brake time to close before the drive shuts off. Regards, Graeme

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5/13/2014 2:17 PM	Rate (0)
eray1907 Posts: 14 Rating: (0)	which type of V/f control use?
eray1907 Posts: 14 Rating: (0)
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5/13/2014 2:33 PM	Rate (0)
Shahide043 Posts: 57 Rating: (0)	Hi, What do you mean by the above question????
Shahide043 Posts: 57 Rating: (0)
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5/13/2014 2:51 PM	Rate (0)
eray1907 Posts: 14 Rating: (0)	Sorry my mistake messed up S 120 with G 120
eray1907 Posts: 14 Rating: (0)
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5/14/2014 6:27 AM	Rate (0)
Shahide043 Posts: 57 Rating: (0)	OK
Shahide043 Posts: 57 Rating: (0)
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5/14/2014 8:20 AM	Rate (0)
Shahide043 Posts: 57 Rating: (0)	Hi, It will of great help if you attach a back-up of Sinamics S-120 CU 320-2DP regarding the same application for reference and understanding. Thanks & Regards
Shahide043 Posts: 57 Rating: (0)
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