Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 92)

Load Initial Configuration Values
Chapter 7
7-23
Selected Velocity Valve, Output for Maximum
(INC48 )
The QDC module uses this word with Maximum Velocity Control Limit
(INC46) above. Enter the %-signal output that the QDC module uses to
drive the selected velocity valve for maximum profile velocity. The QDC
module expects a velocity equal to INC46 when setting the selected
velocity valve to this %-output.
The QDC module uses this setpoint to drive the selected velocity valve
when attempting to attain maximum ram (screw) velocity. It should drive
the selected velocity valve to a spool position that provides full hydraulic
flow into the hydraulic cylinder during injection.
Determine the Output for Maximum value as follows:
9999 (100%) for uni-directional direct acting valves
0 (0%) or 9999 (100%) for bi-directional valves depending on direction
0 (0%) for uni-directional reverse acting valves
If your selected
velocity valve is:
Then the value in
INC48 should be
And during the profile, the QDC module
does NOT drive the valve with a % output
Direct acting greater than value in INC47 greater than value in INC48
Reverse acting less than value in INC47 less than value in INC48
Record the initial Output for Maximum value on Worksheet 7-A.
Important: The valve spanning procedures in chapter 9 require these
initial velocity control limits. For additional information, refer to section
3 of the Plastic Molding Module Reference Manual (publication
1771-6.5.88).
Minimum RPM Control Limit
(PLC45)
The value in this word corresponds to the minimum controllable RPM
during the plastication profile. The QDC module uses this word with the
Selected RPM Valve, Output for Minimum (word 47) below. The QDC
module expects this RPM when setting the selected RPM valve to the
percentage output you enter in word 47.
We recorded zero on Worksheet 7-D.
Set RPM Control Limits