Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 190)

Span Your Valves
Chapter 9
9-33
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 value of DYC09-12 (N40:121-124) that corresponds to the
selected ram (screw) pressure valve, and observe actual pressure
reported in SYS26 (N40:178).
For a bi-directional valve with a spool offset:
If this pressure is greater than zero, adjust the set-output value to
the ram (screw) pressure valve to obtain zero pressure. Stop
adjusting when you observe the smallest pressure attainable.
For a uni-directional valve with no response at low signal level:
If this pressure is zero, adjust the set-output value to the ram
(screw) pressure valve until the observed pressure just exceeds
zero. Then re-adjust this value until you just observe zero again.
For a uni-directional valve with a pressure actual greater than
zero but with zero output to the valve: This is lowest pressure.
6. Once satisfied that you obtained the lowest possible pressure or the
highest possible signal at zero pressure, copy the actual pressure
observed in SYS26 into the minimum pressure control limit: PKC41
(N44:157) for pack, HDC41 (N44: 217) for hold.
7. While maintaining this minimum pressure, observe the actual
set-output value SYS41-44 (N40:193-196) that corresponds to your
ram (screw) pressure valve. Copy this value into the selected
pressure valve, output for minimum: PKC43 (N44:159) for pack,
HDC43 (N44:219) for hold.
8. Modify the value in DYC09-12 (N40:121-124) that corresponds to
the ram (screw) pressure valve in 5% steps while observing rising
pressure in SYS26 (N40:178). Stop adjusting it when the observed
pressure no longer increases with a change in the set-output value.
Now the pressure in SYS26 is the maximum obtainable pressure.
9. Copy the pressure in SYS26 (N44:178) into the maximum pressure
control limit: PKC42 (N44:158) for pack, HDC42 (N44:218) for hold
10. While maintaining this maximum pressure, observe the actual
set-output value in SYS41-44 (N40:193-196) that corresponds to your
selected ram (screw) pressure valve. Copy this value into the selected
pressure valve, output for maximum: PKC44 (N44:160) for pack,
HDC44 (N44:220) for hold.
11. Disable set-output operation. Toggle DYC01-B08 (B34/392) to 0.