What changed from Millenium I to Millenium II?
Physical dimensions of the controller have NOT changed. Just about everything else has. The software and programming cable have both changed. The display is bigger and now has a programmable backlight, and the program memory has doubled. We have also added Custom function blocks like pump rotation archiving and math functions. Sequential Flow Control blocks have also been added. The Millenium II can NOT be programmed from the front face of the controller like the Millenium I.