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

Page 202

Span Your Valves

Chapter 9

9-45

Test Valve Linearity with a Clamp Open Pressure Profile

Jog your clamp to the full open position.

Enable first clamp open by setting DYC02-B10 (B34/410) = 1. The
clamp should move from its start position through the first clamp
open and open slow profiles. If no motion, verify that:

- no overtravel alarms are set. The QDC module inhibits clamp

open if SYS07-B00 through SYS07-B05 are set

- no programming error codes exist in SYS61 and SYS62

Upon completion of clamp open, observe the pressure reported for 1st
clamp open segment 2 (OPS13, N43:721). If the observed pressure is
not about equal to the setpoint you entered in OPC13, then check:

- was your valve and solenoid alignment the same for clamp open

profile execution and clamp open action in set-output?

If the observed pressure OPS13 is still not within 20% of OPC13, your
pressure is not linear over the desired range. Correct as follows:

If:

And Your Selected

Valve is:

Then change FOC44

(N43:340) as follows:

OPS13 was less than OPC13

Direct Acting

Increase in 5% steps

Reverse Acting

Decrease in 5% steps

OPS13 was more than OPC13

Direct Acting

Decrease in 5% steps

Reverse Acting

Increase in 5% steps

To do this: change FOC44, download the FOC and OPC blocks, and repeat
steps 1-3. Do this as necessary.

Important: If downloading from your programming terminal, download
FOC followed by OPC with download bits B21/16 and 20 (chapter 4).

Copy final FOC44 (N43:340) into SOC44, TOC44 and OSC44
(N43:400, 460, and 520), and download these changes.

Important: If downloading from your programming terminal, download
FOC, SOC, TOC and/or OSC followed by OPC (chapter 4).

To download:

Set B21/

FOC

SOC

TOC

OSC

OPC