Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 144)

Span Your Valves
Chapter 9
9-27
3. Copy initial values PLC09-12 into DYC09-12 (N40:121-124) of your
PLC-5 data table with this exception:
Important: Enter a value corresponding to zero RPM into the word
DYC09-12 (N40:121-124) for output 1, 2, 3, or 4 that drives the
selected screw RPM valve.
ATTENTION: A value of zero does not necessarily correspond
to zero RPM. For example, a bi-directional valve would require
a set-output of 50% (5000) to obtain zero RPM.
4. Enable set-output by changing DYC01-B08 (B34/392) from 0 to 1.
This forces the QDC module to apply the values in DYC09-12
directly to its outputs 1-4, respectively.
5. Adjust the set-output value in DYC09-12 (N40:121-124) that
corresponds to the selected RPM valve, and observe the actual screw
RPM reported in SYS27 (N40:179).
For a bi-directional valve with a spool offset:
If this RPM is greater than zero, adjust the set-output value to the
screw RPM valve until the screw stops.
For a uni-directional valve with no response at low signal level:
If this screw RPM is zero, adjust the set-output value to the screw
RPM valve until the screw begins rotating. Then re-adjust this
value until the screw just stops.
For a uni-directional valve with a screw RPM greater than
zero but with zero output to the valve: This is lowest RPM.
6. Once satisfied that you obtained the lowest possible RPM or the
highest possible signal at zero RPM, copy the RPM observed in
SYS27 into PLC45 (N44:401), the Minimum RPM Control Limit.