Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE User Manual
Page 173
Span Your Valves
Chapter 9
9-16
3.
Convert the minimum and maximum flow obtained from your flow
curve to clamp cylinder velocity. This is done by:
Clamp Cylinder Velocity (in/sec) =
Flow (in
3
/sec)
Area (in
2
)
- where area is the inside diameter of the cylinder. This area may
be different for the rod and piston ends of the cylinder:
Area for Rod End =
I.D. of cylinder
2
Rod diameter
2
π
2
2
Area (no Rod) =
I.D. of cylinder
2
π
2
π
- The flow assumes no restrictions on the cylinder exhaust port.
4.
Enter the minimum velocity (usually 0) from this calculation into
FCC45, SCC45, and TCC45. Enter the maximum velocity into
FCC46, SCC46, and TCC46.
5.
Divide the voltage/current corresponding to minimum velocity by the
full range of the valve(s) input signal to determine the percent signal
output for minimum. Enter this value into FCC47, SCC47, TCC47.
6.
Divide the voltage/current corresponding to maximum velocity by the
full range of the valve(s) input signal to determine the percent signal
output for maximum. Enter this value into FCC48, SCC48, TCC48.
7.
Download changes in FCC, SCC, and TCC to the QDC module.
Important: If downloading from your programming terminal, download
FCC, SCC, TCC, and CPC in that order (chapter 4).
To download:
Set B21/
FCC
2
SCC
3
TCC
4
CPC
6