'Cause I lost that battle to politics. We mostly have ABB ACH-550s, and they all have it. But, to standardize, since there are old Grahams out there, and tiny new japanese drives that come in on packaged units, we settled on the H720.
I am now trying to figure out how to get reliable status from motors with ECMs.
Our ABB VFD rep recommended we setup the VFDs for a relay output to supervise current and get the status over communications. This way you have a virtual CS providing proof through communications.
"The bitterness of poor quality remains long after the sweetness of low price is forgotten". --Benjamin Franklin
"Don't argue with an idiot, they will drag you down to their level and beat you with experience". --Mark Twain http://www.campbellmechanical.com