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Forums13
Topics7,418
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Apr 9th, 2026
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Joined: May 2011
Posts: 6
stranger
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stranger
Joined: May 2011
Posts: 6 |
Hello,
Does anyone have the procedure for overspeeding a miprom 21 with a dc digital drive? I have to change out some govenors and not sure how to overspeed the car through the controller.
Any help would be appreciated.
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Joined: Feb 2013
Posts: 805
old hand
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old hand
Joined: Feb 2013
Posts: 805 |
Can't you just Tach the Governor, or is some entity wanting to see an over speed safety set? You can always lift the Brake by pushing in on the P and Brake relays, of course you will need a full load. To over speed the controller you would need a service tool, and change a number of parameters to fool the drive.
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Joined: Jun 2013
Posts: 72
journeyman
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journeyman
Joined: Jun 2013
Posts: 72 |
Do you have to perform a 5 year safety test ??
Could you not just spin the governors ??
Then set the safeties on inspection and check pull through etc
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Joined: May 2011
Posts: 6
stranger
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stranger
Joined: May 2011
Posts: 6 |
I have to replace a couple of governors that are worn out and have to much play in them. The inspector is going to want to see the elevator overspeed during inspection as per my conversation with him. I do have a service tool but do not know what parametors to change. I have moved the car before by pushing in the brake relays but just for short spurts. Will that work if i just hold them in for longer periods or will the contoroller fault out dropping voltage to those relays. This inspection wont be for a couple months but i do want to be prepared. Thanks
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Joined: Jan 2014
Posts: 12
stranger
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stranger
Joined: Jan 2014
Posts: 12 |
you should just be able to turn the speed up with your tool, under msu adjust. I'll double check my book when I can, but it should be pretty simple.
We have to overspeed care here when we replace to governors too.
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Joined: Nov 2025
Posts: 1
stranger
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stranger
Joined: Nov 2025
Posts: 1 |
Any updates, I’m in the same situation where our state inspector wants to see an Overspeed to set safeties. Not familiar with this controller but we do have a service tool to change parameters if need to. Thanks and appreciate all help.
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Joined: Feb 2013
Posts: 805
old hand
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old hand
Joined: Feb 2013
Posts: 805 |
There is nothing in the service tool telling you how to overspeed the car with the controller. The easiest way is to hold P and the Brake relay in by hand with a full load in the car. The service tool does have an option to run the car and counterweights into the buffer at full. speed. It is a process that invloves jumping out rail switches and jumping the ETS, and NTS Boards out.I don't recomend attemting this if you aren't extremly familiar with the Miprom 21 controller.
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HW PM
by Chris, January 13
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