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Topic Title: Inverter fault reset by operator button
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Created On: 16 November 2010 01:52 PM
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 16 November 2010 01:52 PM
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badflaw

Posts: 2
Joined: 16 November 2010

Hello I am a Maintenance Technician working on a new piece of packaging /conveyingquipment.

The system controls a multitude of belts from a PLC . There is a HMI on the system.

One of the belts stopped with no errors on the HMI. The belt started again when we pressed a start button. Then stoppe donce more
After looking in the electrical panel we found a overcurrent was coming on the inverter a few seconds after every start.

What concerns me is that an unskilled person can unknowingly repeatedly start the belt after an electrco/mechanical fault. For me this has safety concerns and it also allows mechanical damage to occur.
Also the fact that no visable alarm is displayed warning operators and all the other associated belts keep running ,causing jamming up of products.

I want to challenge the machine manufacturers to change the mod eof operation at their cost, but I wanted to get my facts right first. Do you know if there are any best practices/ regulations which would help the cause?

Thankyou in advance
 16 November 2010 05:04 PM
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alancapon

Posts: 5763
Joined: 27 December 2005

For information, this post has also been placed in the "wiring and the regulations" forum.

Regards,

Alan.
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