TheWaterboy
Lifetime Supporting Member + Moderator
I need some boilerplate language that I can have placed in the spec that will instruct a contractor that during final signoff of their cabinet project they need to provide just enough programming in the PLC to prove it all works from bit to action. Then I know when the cabinet is released to me I can install my program and it just works.
Historically we do our own programming for the resulting assembly and in that last 15 years I never had this issue because, I assume, it was generally understood it was needed to certify it works.
In in this most recent project the contract said, as it always has, "program by others" and they took that seriously. This meant to perform the functional test they hotwired all the IO never once running it through the PLC logic to test the PLC IO flow for bad modules etc. They also didn't provide SFP's for the network switch fiberoptic connections, and weren't even sure what they were, but that's for another time.
Maybe I have just been lucky but I've never had to spell this level of detail out before but it appears I have to going forward. Would anyone share the few sentences that have used to specify this with no ambiguity available to the contractor that I can incorporate into the specs for the next project.
Historically we do our own programming for the resulting assembly and in that last 15 years I never had this issue because, I assume, it was generally understood it was needed to certify it works.
In in this most recent project the contract said, as it always has, "program by others" and they took that seriously. This meant to perform the functional test they hotwired all the IO never once running it through the PLC logic to test the PLC IO flow for bad modules etc. They also didn't provide SFP's for the network switch fiberoptic connections, and weren't even sure what they were, but that's for another time.
Maybe I have just been lucky but I've never had to spell this level of detail out before but it appears I have to going forward. Would anyone share the few sentences that have used to specify this with no ambiguity available to the contractor that I can incorporate into the specs for the next project.