Yaskawa FSP Amplifier FlexWorks - Manual (Page 57)

Operating the FSP Amplifier Using FlexWorks
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4.8.1. Mechanical Analysis Window
Figure 30: Mechanical Analysis Window
Accurate measurement of the frequency characteristics depends on
the settings of the following parameters:
♦ Sampling Time [μsec] (Measurement Frequency [Hz],
Excitation Time [ms])
If the sampling time is shortened, a higher frequency can be
measured and the excitation time is shortened. However,
frequency resolution deteriorates and measurement accuracy is
reduced at low measuring frequency. The measuring frequency
and excitation time depend on the sampling time. To begin, set
the sampling time to a small value. Then, reset it to a more
appropriate value in accordance with the results produced.
♦ Excitation Amplitude [±%/Rated torque] Range: 1 to 300%.
Must be set to a value below the Torque Limit.
Select the size of the reference amplitude applying excitation to
the machine as a percentage of the ratio of size to rated torque.
A larger excitation amplitude tends to give more correct
measurements, but an excessively large amplitude can cause
overspeed (A.51) and overcurrent (A.10) alarms. Problems with