Rockwell Automation 9329 Drive Application Software Inertia Comp Imperial Units User Manual

Page 15

FM – Inertia Compensation

Drive Application Software – page 15 of 28

4.4.8 JGainQuad1Quad2

This input parameter is the inertia compensation gain for operational quadrants 1 & 2.
This parameter is entered as a real number where 1.0 = 100% gain.
Quadrant 1 – Positive Speed, Positive Inertia Torque (acceleration forward)
Quadrant 2 – Negative Speed, Positive Inertia Torque (deceleration reverse)
Usage – Typically set to 1.0, however if strip tension deviations occur in quadrant 1 &
2 only, inertia compensation can be adjusted slightly to reduce tension deviations by
adjusting slightly above or below a value of 1.0.

4.4.9 JGainQuad3Quad4

This input parameter is the inertia compensation gain for operational quadrants 3 & 4.
This parameter is entered as a real number where 1.0 = 100% gain.
Quadrant 3 – Negative Speed, Negative Inertia Torque (acceleration reverse)
Quadrant 4 – Positive Speed, Negative Inertia Torque (deceleration forward)
Usage – Typically set to 1.0, however if strip tension deviations occur in quadrant 3 &
4 only, inertia compensation can be adjusted slightly to reduce tension deviations by
adjusting slightly above or below a value of 1.0.

4.4.10 Friction_Pct

This input parameter determines the kinetic friction losses in percent of rated motor
torque.
Usage – Tune for best operation (See section 6, Tuning / Start-up).

4.4.11 Windage_PctRPM

This input parameter determines the windage losses in percent of rated motor torque
per motor speed in RPM.
Usage – Tune for best operation (See section 6, Tuning / Start-up).

4.4.12 MtrTrqRated_lbft

This input parameter is the motor rated torque in pound-feet

Usage – Set equal to the motor rated torque in pound-feet.

4.4.13 ReverseRotation

This input parameter negates the DrvTrqRfJLos_PU return parameter below.
Usage – For center winder applications, set false for over wind operation and true for
under wind operation. (Assuming positive rotational speed produces positive line
speed during over wind operation.) For constant diameter applications, set false.

4.4.14 J_lbft2

This return parameter is the total reflected inertia in Pound-Feet2.
Usage – Monitor or display only.

4.4.15 TrqRfJ_Pct

This return parameter is the inertia torque component in percent of rated motor
torque.
Usage – Monitor or display only.

4.4.16 TrqRfLoss_Pct

This return parameter is the friction and windage losses torque component in percent
of rated motor torque.

RPM

MtrSpdBase

HorsePower

lbft

MtrTrqRate

5250