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Forums13
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Apr 9th, 2026
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Joined: May 2013
Posts: 246
enthusiast
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enthusiast
Joined: May 2013
Posts: 246 |
I’ve got a tac32T dropping the safety string at the safpld input. I can’t find this anywhere in the prints. It’s after all the other safety inputs but before the safsp. I’m thinking circuit is internal to the IOE board and possibly has something to do with the door bypass switches ( like the inspection switch I’ve had issues with on other tac32’s). I do get I/o mismatch faults and faults having to do with car running high speed while on inspection. I can’t remember fault numbers. I do have an ioe board ordered but does anyone know what this input has to do with exactly?
If all else fails, read the instructions
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Joined: Dec 2015
Posts: 1,769 Likes: 12
ElevatorPractitioner
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ElevatorPractitioner
Joined: Dec 2015
Posts: 1,769 Likes: 12 |
The PLD is a programmable logic device made up of gates to perform the monitor functions required by code that are normally done with relay contacts. It can open the safety string if one of these monitors fail. It is possible the device itselton the IOE is bad but most of the problems I’ve had with PLD dropping have been from software. What version generic, SP, & NP software are you running?
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Joined: May 2013
Posts: 246
enthusiast
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enthusiast
Joined: May 2013
Posts: 246 |
Not sure what software, I haven’t payed attention but will look this week. I have also seen this safpld input flicker on and off.
If all else fails, read the instructions
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Joined: Feb 2018
Posts: 153
20 yr tech
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20 yr tech
Joined: Feb 2018
Posts: 153 |
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HW PM
by Chris, January 13
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