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A hoist manufacturer has used Siemens Micro Master 440 on the Vertical material handling for a 15 Tone hoist ,(30 kW motor). There is a problem when l...

Goals and Symptoms

A hoist manufacturer has used Siemens Micro Master 440 on the Vertical material handling for a 15 Tone hoist ,(30 kW motor). There is a problem when load is lifting to a certain height and stop in the air and than operator decide t o lift it up more the load comes down. There is a Mechanical brake keep the load in steady state and they put 1.5 Sec delay on it when the command on lifting in the air received to preventing coming down.The costumer says Hoist is working under FEM standard group 4M. Solving the problem we are proposing ATV58, regarding to situation do you have any idea help us to complete our proposal.

Facts and Changes

Hoist

Causes and Fixes

The best way is to use an ATV58F with encoder and braking function.

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