Rockwell Automation 9329 Drive Application Software User Manual
Page 17
FM – Diameter Calculation
Drive Application Software – page 17 of 30
4.4.17 DiamRate_inRev
This input controls the max rate of change for the diameter calculator. The value is
entered in inches per revolution of the spindle (roll). The maximum rate of change
required for the process should entered in the tag. The change in diameter per
revolution is the product thickness * 2. This input is used only for limitation of the
diameter calculator. The formula below calculates the minimum value that should be
used for DiamRate_inRev. Actual values should be at increased at least 5% to avoid
unwanted limitation of the diameter calculator.
Usage – Set the input for the maximum rate of change for the application.
4.4.18 DiamIncEnbl
This input sets the function of the diameter calculator. If the input is low, the diameter
calculator cannot increase. If the input is set high, the diameter calculator can
increase. The setting of this input has not effect on the diameter preset functions.
Usage – Set this bit high for winder applications. This bit is typically set low for
unwind applications.
4.4.19 DiamDecEnbl
This input sets the function of the diameter calculator. If the input is low, the diameter
calculator cannot decrease. If the input is set high, the diameter calculator can
decrease. The setting of this input has not effect on the diameter preset functions.
Usage – Set this bit high for unwind applications. This bit is typically set low for
Winder applications.
4.4.20 DiamCalc_in
This output is the actual calculated diameter in inches. If DiamMeasEnbl is high, this
is the limited measured diameter value.
Usage – This output is typically be used for scaling and calculation in the winder
application and for display of the running diameter.
4.4.21 RadiusCalc_ft
This output is the calculated roll radius in feet.
Usage – Typically used for calculating required motor torque or converting from FPM
to RPM
1000
*2
kness_mils
MaxWebThic
nRev
DiamRate_i
=
2
12in
n
DiamCalc_i
24
n
DiamCalc_i
_ft
RadiusCalc
=
=
ft
Radius
lb
Tension
lbft
Torque
_
*
_
_
=