Rockwell Automation 1771-QDC, D17716.5.87(Passport) CLAMP AND EJECT MODE - Manual (Page 162)

Span Your Clamp and Ejector Valves
Chapter 9
9-26
If the actual velocity is still not representative of your setpoint, your flow
valve is not linear over the range of your setpoint
If: And Your
Selected Valve is:
Then:
OPS12 was less than OPC12 Direct Acting Increase FOC48, SOC48, TOC48, and
OSC48 by 5%
Reverse Acting Decrease FOC48, SOC48, TOC48, and
OSC48 by 5%
OPS12 was more than
OPC12
Direct Acting Decrease FOC48, SOC48, TOC48, and
OSC48 by 5%
Reverse Acting Increase FOC48, SOC48, TOC48, and
OSC48 by 5%
Repeat steps 3 through 6 as necessary.
What You Have Accomplished
The valve spanning procedure you just completed has:
defined the range of velocity available during any clamp open profile
informed the QDC module of the signal level needed to drive the
selected clamp velocity valve(s) for any requested open-loop velocity:
% of Signal Level Entered In: Drives the Selected Valve to Produce:
FOC47, SOC47, TOC47, OSC47 Velocity (usually 0) in FOC45, SOC45, TOC45, and OSC45
FOC48, SOC48, TOC48, OSC48 Velocity in FOC46, SOC46, TOC46, and OSC46
Now, for all open-loop velocity-controlled clamp open profiles, the QDC
module:
drives the selected clamp velocity valve between the signal limits
imposed by FOC47 and FOC48, or SOC47 and SOC48, or TOC47 and
TOC48, or OSC47 and OSC48.
assumes a linear relationship between clamp speed and the signal
outputs