Parker AC890 Product Manual page 400

Parameter Descriptions
PERIOD
The wave form period in seconds.
ACTIVE
Diagnostic. TRUE when either ENABLE SPEED or ENABLE PHASE are active.
RUN TR FUNC TEST
Use this parameter to start the test. Wait until the motor is turning at steady speed, then set it to TRUE. When the test is
finished it will be automatically returned to FALSE.
NO OF MEASRMENTS
This parameter sets the number of times the pseudorandom torque sequence is applied to the motor. The sequence duration is
typically around 2 seconds, the test will last for 2 seconds times the number of measurements set here. The results will
normally be contaminated with noise. The more measurements are taken, the better the signal to noise ratio. Typically 100 to
1000 measurements will be required, depending on the complexity of the system.
TORQUE AMPLITUDE
Sets the amplitude of the pseudorandom torque pulses applied for the test. The larger the amplitude, the better the signal to
noise ratio. However, the current loop must be operating in linear mode for the test to be valid, so do not choose an amplitude
that would drive the current loop into saturation.
890SD Standalone Drive - Frames G, H & J
PREF: 111.01
PREF: 111.06
PREF: 111.12
PREF: 111.13
PREF: 111.14
Default: 10.000 s
Default: FALSE
Default: FALSE
Default: 100
Default: 10.00 %
Range: 0.001 to 30.000 s
Range: FALSE / TRUE
Range: FALSE / TRUE
Range: 1 to 1000
Range: 0.00 to 100.00 %
D-109
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