Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 141)

Load Initial Profile Values
Chapter 8
8-20
Pack/Hold Profile Block Identifier
(HPC01)
Bits 07-00 of this word identify it as the first word in a series used to
define the pack/hold profile. These bits must be set to 00001100.
We entered these bits on Worksheet 8-C.
Profile Offset Sign
(HPC03)
Profile offsets let you shift the amplitude of entire profiles up or down, if
necessary. The offset sign determines the direction of shift.
- BIT 15 selects the profile offset sign for the hold profile.
- BIT 13 selects the profile offset sign for the pack profile.
We set these bits to 0 for positive offset on Worksheet 8-C.
Logical Bridges
(HPC03)
Logical bridges control the action taken by the QDC module when it
completes a profile or movement.
The following bits of HPC03 determine whether the QDC module stops or
continues when entering and/or leaving the pre-decompression movement.
- BIT 09 determines if the QDC continues to the plastication profile
after the pre-decompression movement, or stops and sets outputs.
- BIT 08 determines if the QDC continues to the pre-decompression
movement after the hold profile, or stops and sets outputs.
0 = continues to next phase
1 = stops and sets outputs
We set these bits to 1 to stop and set outputs on Worksheet 8-C.
Important: All other bit selections in HPC03 should be zero.
Expert Response Compensation
(HPC04)
- BITS 10 and 08 determine whether you apply Expert Response
Compensation (ERC) to pack and hold profiles. ERC is an exclusive
algorithm that adjusts for changes in your machine, hydraulics, raw
materials, and other process variables. It compensates for abrupt
upsets and long term deviations.
0 = Expert Response Compensation ON
1 = Expert Response Compensation OFF
We set these bits to 1 (ERC = Off) on Worksheet 8-C.
Determine Bit Selections
for Worksheet 8ĆC