2-62 Parameter Descriptions
7000-TD002A-EN-P – September 2007
Total Inertia [Total Inertia]
Linear Number: 82
Default Value: 1.00 sec
Minimum Value: 0.10 sec
Maximum Value: 50.00 sec
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the total inertia of the motor and load, which is defined as the time in seconds
required to accelerate to the rated speed at the rated torque. In conjunction with Speed Regulator
Bandwidth, it is used to calculate the gains for the speed regulator.
Speed Feedback Mode [Speed Fbk Mode]
Linear Number: 89
Default Value: Sensorless
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the type of speed feedback used. The available options are:
Sensorless Stator Frequency with Slip Compensation
Pulse Tach Tachometer/Encoder
The drive automatically switches to stator frequency feedback when a Tach Loss warning occurs. If the
Tach Loss warning is successfully cleared the drive switches back automatically to tachometer feedback
mode.
Speed Regulator Bandwidth [SpdReg Bandwidth]
Linear Number: 81
Default Value: 1.0 r/s
Minimum Value: 0.1 r/s
Maximum Value: 15.0 r/s
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the small signal bandwidth of the speed control loop. It is used in the calculation
of the speed regulator gains. This parameter affects only the response time of the speed regulator and
not the overshoot.
Speed Reference Step [Speed Ref Step]
Linear Number: 88
Default Value: 0.0 Hz
Minimum Value: 0.0 Hz
Maximum Value: 2.0 Hz
Access Level: Service
Read/Write: Read/Write
This parameter specifies the magnitude of the step that is added to the speed error to demonstrate the
step response of the speed loop. It is not saved and is initialized to zero at power up.
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