9ć19, Span your injection pressure valve, Span your valves chapter 9 – Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE User Manual
Page 176: Confirm critical values
Span Your Valves
Chapter 9
9-19
Span your injection pressure valve for optimum pressure performance.
You do this in four parts:
Confirm critical values
Span your injection pressure valves
Test valve linearity with a pressure vs. time injection profile
Set profile pressure alarms
Important: You may omit the next three parts of this section if you have
the right information on valve spanning. Many injection molding machine
OEMs and hydraulic valve manufacturers provide data on spanning the
working range of valves used on their machines. If this information is
available from your OEM for your machine’s injection pressure valve(s),
enter the values into pressure control limits INC41-44 and proceed to Set
Profile Pressure Alarms.
Confirm Critical Values
Important: Confirm that all entries you made for configuration values
(chapter 7) and profile values (chapter 8) are as follows:
On Worksheet
Confirm Your Configuration
With These Words or Bits
ProĆSet Addr.
7ĆE, 7ĆG
QDC module output to which you connected
your pressure control valve
INC02ĆB06, B05, B04
B38/20, 21, 22
SetĆoutput values for 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
Pressure limits:
Minimum Pressure Control Limit
Maximum Pressure Control Limit
Selected Pressure Valve, Output for Min
Selected Pressure Valve, Output for Max
INC41 = 0
INC42 = system pressure
INC43 = your value
INC44 = your value
N44:37
N44:38
N44:39
N44:40
EndĆofĆprofile setĆoutput values
HDC33Ć36 for zero output
N44:209Ć212
8ĆB, 8ĆC
Pressure vs Time algorithm
IPC03ĆB01 = B00 = 1
B38/96Ć97
OpenĆloop control
IPC04ĆB03 = B02 = B01 = B00 = 1
B38/112Ć115
Expert Response Compensation (ERC) = Off
IPC04ĆB11 = B10 = B09 = B08 = 1
B38/120Ć123
Pressure setpoints
IPC10,14,18,22,26,30,34,38,42,46,50
all equal to oneĆhalf system pressure
start @ N44:66
end @ N44:106
Time setpoints
IPC12,16,20,24,28,32,36,40,44,48
all equal to 1 second (100)
start @ N44:68
end @ N44:104
Transition setpoints
Time limit
Ram (screw) position
Ram (screw) pressure
Cavity pressure
Minimum position for pressure transition
IPC60 = 10 seconds (1000)
IPC61 = zero to inhibit
IPC62 = zero to inhibit
IPC63 = zero to inhibit
IPC64 = zero to inhibit
N44:116
N44:117
N44:118
N44:119
N44:120
Logical bridge to stop and set outputs
HPC03ĆB08 = 1
B38/296
Span Your Injection
Pressure Valve