Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 104)

Load Initial Configuration Values
Chapter 7
7-28
Unselected Valve SetĆoutput Values
(FCC09 Ć 12, SCC09 Ć 12, TCC09 Ć 12, LPC09 Ć 12, FOC09 Ć 12, SOC09 Ć 12,
TOC09 Ć 12, OSC09 Ć 12, EAC09 Ć 12, ERC09 Ć 12)
Earlier in this chapter, you told the QDC module which of its four outputs
were being used to control pressure and flow profiles. Your machine
hydraulics probably require that the remaining valves connected to your
QDC module assume a certain state when one of the two selected valves is
being used for control.
Words 09 through 12 of the respective configuration blocks define these
set-output values. The QDC module sets its outputs for all unselected
valves to the values in these words each time it initiates execution of the
appropriate profile. The QDC module ignores the unselected valve
set-output value associated with the “selected” profile valve.
Important: If the QDC module is commanded to initiate execution of any
of the four Clamp Open profiles when the ejector profile is in progress, the
executing Clamp Open profile takes control of all the unselected valves in
the ejector profile and the QDC module does not access the data in words
09 through 12 for either EAC or ERC unless the interrupting Clamp Open
profile is completed before the ejector profile is completed. Likewise, if
the QDC module is commanded to initiate execution of an Ejector Profile
during its execution of any of the four Clamp Open profiles, the executing
Clamp Open profile surrenders control of only the “selected” ejector
profile valve. In general, clamp open profile unselected valve values
take precedence over ejector profile unselected valve values.
Determine Unselected Valve
SetĆoutput Values