Just swapped out an old relay logic controller for a new programmable one on a 90s Otis

The old system had about 40 relays and took me two full days to trace a single floor skip issue. The new PLC I put in last week has maybe 10 components total. I found the fault in under an hour because the diagnostic screen just told me. Has anyone else made this switch on an older unit and seen the same time save?

2 comments

2 Comments

davidwright1d ago

Man, I feel that. I spent half a day once just listening for a click in a relay rack, only to find a wire had worn through under a cable tie. The new stuff just shows you "Input 7 Fault" on a screen. Makes you wonder what we did with all that extra time, doesn't it? Probably just looked for more relays to check.

dakotal161d ago

Yeah @davidwright, a good flashlight was my best tool for that lol