Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 160)

Span Your Valves
Chapter 9
9-3
We recommend that you first span your low pressure close pressure valve
for optimum pressure performance. You do this in five parts:
Confirm critical values
Span your low pressure close pressure valve
Test value linearity with a low pressure close (LPC) profile
Set up tonnage (hydraulic clamps) or holding pressure (toggle clamps)
Set the profile pressure alarm
Important: You may omit the next four 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 low pressure close valve,
enter the values into pressure control limits LPC41-44 and proceed to Set
the Profile Pressure Alarm.
Confirm Critical Values
Important: Confirm that your configuration values (chapter 7) and profile
values (chapter 8) for the low pressure close profile are as follows:
On Worksheet: Confirm Your Configuration: With These Words or Bits: ProĆSet Addr.
7ĆD QDC module output to which you connected your
selected pressure control valve
LPC02ĆB06, B05, B04
your selection
B37/214, 213, 212
Your unselected setĆoutput values for outputs 1Ć4 LPC09ĆLPC12 = your values N43:185Ć188
All ramping is disabled with zero ramp rates LPC17ĆLPC20 = 0
LPC25ĆLPC28 = 0
N43:193Ć196
N43:201Ć204
Pressure limits:
Minimum Control Limit
Maximum Control Limit
Selected Pressure Valve, Output for Minimum
Selected Pressure Valve, Output for Maximum
LPC41 = 0
LPC42 = your value
LPC43 = your value
LPC44 = your value
N43:217
N43:218
N43:219
N43:220
8ĆA Start LPC on zone overrun CPC03ĆB11 = 0 B37/299
Expert Response Compensation (ERC) is
disabled
CPC04ĆB15 = 1 B37/319
OpenĆloop control CPC04ĆB07 = 1 B37/311
Pressure setpoint CPC37 = your value N43:273
Start LPC position CPC61 = your value N43:297
Mold safe position CPC62 = your value N43:298
If these are not your current values, we suggest that you correct them now
using the download procedure discussed in chapter 4.
Span Your Low Pressure
Close Valve