Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 107)

Load Initial Configuration Values
Chapter 7
7-31
As you read the following sections, fill in the values for the mentioned
words in the worksheets. Depending on the clamp and ejector profiles
required by your application, ramp rates may be necessary to provide
smooth actuator motion. The QDC module provides you with
multi-stepped profiles to reduce the need for ramp rates. We recommend
starting with a value of zero for all ramp rates and altering them only if
rough, jerky motion occurs during profile tuning.
ATTENTION: Using ramps inhibits effective closed-loop
control, ERC calculations, and reduces QDC module control
capability. Use ramps only if machine operation mandates.
Acceleration Ramp Rates
(FCC17 Ć 20, SCC17 Ć 20, TCC17 Ć 20, LPC17 Ć 20, FOC17 Ć 20,
SOC17 Ć 20, TOC17 Ć 20, OSC17 Ć 20, EAC17 Ć 20, ERC17 Ć 20)
The QDC module utilizes these acceleration ramp rates when moving its
outputs from one setpoint to a higher setpoint during execution of the
appropriate profile. These ramp rates are effective for both selected and
unselected valves. A ramp rate of zero disables ramping, and the QDC
module “steps” directly from setpoint to setpoint.
Enter 0 for all Acceleration Ramp Rates. The valve spanning procedures
presented in chapter 9 require no ramping. A detailed discussion of this
type of setpoint is presented in chapter 10 to assist you in selecting the
correct, final values required by your application. Additional information
may also be obtained by referencing Section 3 of the Plastic Molding
Module Reference Manual (pub. no. 1771-6.5.88).
Deceleration Ramp Rates
(FCC25 Ć 28, SCC25 Ć 28, TCC25 Ć 28, LPC25 Ć 28, FOC25 Ć 28,
SOC25 Ć 28, TOC25 Ć 28, OSC25 Ć 28, EAC25 Ć 28, ERC25 Ć 28)
The QDC module utilizes these deceleration ramp rates when moving its
outputs from one setpoint to a lower setpoint during execution of the
appropriate profile. These ramp rates are effective for selected and
unselected valves. A ramp rate of zero disables ramping, and the QDC
module “steps” directly from setpoint to setpoint.
Enter 0 for all Deceleration Ramp Rates. The valve spanning procedures
presented in chapter 9 require no ramping. A detailed discussion of this
type of setpoint is presented in chapter 10 to assist you in selecting the
correct, final values required by your application. Additional information
Set your Accel/Decel
Ramp Rates