Rockwell Automation 9329 Drive Application Software Tension Control Gen. Units - Manual (Page 28)

FM – Tension Control
Drive Application Software – page 28 of 52
4.6.1 DiamCalc_EU
The DiamCalc_EU is the actual diameter of the center drive roll. This comes from
the Diameter Calculator Routine.
Usage – Connect the DiamCalc_In tag to the JSR instruction
4.6.2 DiamFr_EU
This is the Diameter where the taper tension stops decreasing. When the
DiamCalc_EU is equal to DiamFR_EU, then the actual web tension will equal Set
point Tension * TenRfTaper_Pct.
Usage – Input the Diameter value at which the taper tension stops decreasing. In the
Application Module, this is set to the full roll diameter value.
4.6.3 DiamStrtTaper_EU
This is the Diameter where the actual tension starts decreasing s set by the taper
tension percent. If the DiamCalc_EU is below this value the taper tension percent
will remain at 100%. When the DiamCalc_EU is greater than DiamStrtTaper_EU,
then the taper tension will decrease toward the TenRfTaperFR_Pct.
Usage – Input the Diameter value at which the taper tension starts decreasing.
4.6.4 TenRfTaperFR_Pct
This is the final value of the taper tension. The Taper Tension Output will equal this
value whenever the DiamCalc_EU is equal or greater to DiamFR_EU.
Usage – Input the Taper Tension Reference final value in percent.
4.6.5 TenRfTaper_Pct
This is the output of the taper tension reference routine. The output remains at 100%
until the diameter is equal to or greater than DiamStrtTaper_EU. When the diameter
is between the start diameter and full row diameter, the tension reference is reduced
on a linear basis between 100 percent and the value of full roll tension reference.
This output is multiplied by the Tension set point to generate a final tension reference
based on taper.