Rockwell Automation 1771-QDC, D17716.5.85(Passport) MNL. PLASTIC MOLDING MODULE - Manual (Page 124)

Span Your Valves
Chapter 9
9-7
Span your flow valve for optimum velocity performance in three parts:
Confirm critical values
Span your injection flow valve
Test valve linearity with a velocity vs. position profile
Important: You may omit the subsection Span Your Injection Flow Valve
below if you have information from molding machine OEMs or hydraulic
valve manufacturers on spanning the working range of valves. If available
for your machine’s injection flow valve, enter valve spanning values into
velocity control limits INC45-48 and proceed to Test Valve Linearity.
First, confirm your critical values.
Confirm Critical Values
Confirm that your recorded configuration values (chapter 7) and profile
values (chapter 8) are correct for the velocity vs. position profile.
Important: Use the following configuration and profile values:
On Worksheet Confirm Your Configuration With These Words or Bits ProĆSet Addr.
7ĆA
(chapter 7)
QDC module output to which you connected your
flow control valve
INC02ĆB02, B01, B00
your selection
B38/16, 17, 18
SetĆoutput values for outputs to unselected valves INC09Ć12 = your values N44:5, 6, 7, 8
All ramping is disabled with zero ramp rates INC17Ć20 = 0
INC25Ć28 = 0
N44:13Ć16
N44:21Ć24
Velocity limits:
Minimum Velocity Control Limit
Maximum Velocity Control Limit
Selected Velocity Valve, Output for Minimum
Selected Velocity Valve, Output for Maximum
INC45 = 0
INC46 = max velocity per valve specs
INC47 = your value
INC48 = your value
N44:41
N44:42
N44:43
N44:44
7ĆC EndĆofĆprofile setĆoutput values HDC33Ć36 for zero output N44:209Ć212
8ĆA
(chapter 8)
Velocity units are inches (mm)/sec IPC03ĆB14 = 1 B38/110
OpenĆloop control IPC04ĆB03 = B02 = B01 = B00 = 1 B38/112Ć115
Expert Response Compensation (ERC) is disabled IPC04ĆB11 = B10 = B09 = B08 = 1 B38/120Ć123
Velocity setpoints IPC09,13,17,21,25,29,33,37,41,45,49
all equal to max velocity per valve specs
start @ N44:65
end @
N44:105
EndĆof segment position setpoints IPC11, 15, 19, 23, 27, 31, 35, 39, 43, 47,
equal segments over length of travel
start @ N44:67
end @
N44:103
8ĆB Logical bridge to stop and set outputs HPC03ĆB08 = 1 B38/296
Span Your Injection
Velocity Valve