Rockwell Automation 1771-QDC, D17716.5.93(Passport) PLASTIC MOLDING MODULE - Manual (Page 222)

Span Your Valves
Chapter 9
9-56
12. Disable set-output by transitioning DYC01-B08 (B34/392) to 0.
13. Download your changes in EAC to the QDC module.
Important: If downloading from your programming terminal, download
EAC followed by EPC with download bits B21/21 and 23 (chapter 4).
Test Valve Linearity with an Ejector Pressure Profile
1. Jog your ejector to the fully retracted position.
2. Enable the ejector profile by setting DYC02-B14 (B34/414) to 1.
The ejector should move through its advance and retract stroke. If no
motion, verify that:
- no overtravel alarms are set. The QDC module inhibits ejector
profiles if SYS07-B00 through SYS07-B05 are set
- there are no programming error codes in SYS61 and SYS62
3. Upon completion of the ejector profile, observe the pressures reported
for ejector advance and ejector retract segment 1 in EPS10 (N45:182)
and EPS34 (N45:206). If observed pressures are not approximately
equal to the setpoints entered in EPC10 and EPC34, then check:
- was your valve and solenoid alignment the same for ejector profile
execution and ejector action in set-output?
If the observed pressures in EPS10 and EPS34 (N45:182 and 206) are still
not within 20% of setpoints EPC10 and EPC34 (N45:126 and 150), your
pressure valve is not linear over the desired range. Correct as follows:
If: And Your Selected
Valve is:
Then change EAC44 (N45:40)
or ERC44 (N45:100) as follows:
EPS10 was less than EPC10 Direct Acting Increase EAC44 by 5%
Reverse Acting Decrease EAC44 by 5%
EPS10 was more than EPC10 Direct Acting Decrease EAC44 by 5%
Reverse Acting Increase EAC44 by 5%
EPS34 was less than EPC34 Direct Acting Increase ERC44 by 5%
Reverse Acting Decrease ERC44 5%
EPS34 was more than EPC34 Direct Acting Decrease ERC44 5%
Reverse Acting Increase ERC44 by 5%
To do this: change EAC44 or ERC44, download the EAC or ERC block,
and repeat steps 1-3. Do this as necessary.
Important: If downloading from your programming terminal, download
EAC or ERC followed by EPC with download bits B21/21 or 22, and 23.