Emerson Control Techniques Epsilon Eb Series Reference Manual page 144

Inertia Ratio
Inertia Ratio specifies the load to rotor inertia ratio and has a range of 0.0 to 50.0. A value of
1.0 specifies that load inertia equals the rotor inertia (1:1 load to motor inertia). The drives
can control up to a 10:1 inertia mismatch with the default Inertia value of 0.0. Inertial Ratio
mismatches of over 50:1 are possible with some minimal additional adjustments.
Note
If the exact inertia value is unknown, the value that is entered should be conservative,
because values higher than the actual can cause the motor to oscillate.
Friction
This parameter specifies the viscous friction component of the load and has a range of 0.0 to
100.0. The units are percent continuous torque increase per 100 RPM. This value is used to
tune the velocity and position loops, including feedforward compensation (if enabled). A
typical value would be between 0.0 and 1.0.
Note
If the value is unknown, use a conservative value or a zero value.
Response
The Response adjusts the velocity loop bandwidth with a range of 1 to 500 Hertz. In general,
it affects how quickly the drive will respond to commands, load disturbances and velocity
corrections. The effect of Response is greatly influenced by the status of the High
Performance Gains. With High Performance Gains enabled, the maximum value
recommended is 100 Hz.
Step 6: Assigning Inputs
Inputs are assigned in the Inputs tab which is divided into two windows. The "Input
Functions" window, on the left side, displays the input functions available, the function
polarity and the always active state. The "Input Lines" window, on the right side, displays the
four input lines, the debounce value and input function assignments.
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