Parker ac890 - Page 507

D-111 Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
Parameter Descriptions
PERIOD
PREF: 111.01
Default: 10.000 s
Range: 0.001 to 30.000 s
The wave form period in seconds.
ACTIVE
PREF: 111.06
Default: FALSE
Range: FALSE / TRUE
Diagnostic. TRUE when either ENABLE SPEED or ENABLE PHASE are active.
RUN TR FUNC TEST
PREF: 111.12
Default: FALSE
Range: FALSE / TRUE
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
PREF: 111.13
Default: 100
Range: 1 to 1000
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
PREF: 111.14
Default: 10.00 %
Range: 0.00 to 100.00 %
Sets the amplitude of the pseudorandom torque pulses applied for the test. The larger the amplitude, the better the signal to
nois
e 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.