15-7
IM 253710-01E
Motor Evaluation Function (Applicable to Motor Modules)
15
Selecting the frequency input range of the revolution sensor signal
The selection made here takes effect when the revolution sensor signal type is set to
[Pulse]. Two types of range settings are available: fixed range and auto range.
• Fixed range
Select from the following frequency input ranges:
2k-200kHz, 250-8kHz, 16-800Hz, and 1-40Hz.
• Auto range
Select [Auto] for the frequency input range setting to enable auto range. The range
changes automatically depending on the frequency of the input signal. The
switching conditions and precautions are indicated below. The different ranges
used in the auto mode are the same as those available for fixed range.
Frequency Input Range
Conditions for Stepping Up or Down the Range
2k-200kHz
Stepping down
There is at least one data point that is less than or equal to 2
kHz within the observation time.
No change
All data points are greater than 2 kHz within the observation
time.
250-8kHz
Stepping up
There is at least one data point that is greater than or equal
to 5 kHz within the observation time.
Stepping down
There is at least one data point that is less than or equal to
250 Hz within the observation time.
No change
• All data points are greater than 250 Hz and less than 5
kHz within the observation time.
or
• There is at least one data point that is less than or equal
to 250 Hz and another point that is greater than or equal
to 5 kHz within the observation time.
16-800Hz
Stepping up
There is at least one data point that is greater than or equal
to 312.5 Hz within the observation time.
Stepping down
There is at least one data point that is less than or equal to
15.625 Hz within the observation time.
No change
• All data points are greater than 15.625 Hz and less than
312.5 Hz within the observation time.
or
• There is at least one data point that is less than or equal
to 15.625 Hz and another point that is greater than or
equal to 312.5 kHz within the observation time.
1-40Hz
Stepping up
There is at least one data point that is greater than or equal
to 19.53125 Hz within the observation time.
No change
All data points are less than 19.53125 Hz within the
observation time.
Note
•
When a frequency below the lower limit of each frequency input range (16 Hz of range [16-
800Hz], for example) is input, [-----] may be displayed. During cursor measurement, zero may
be displayed.
•
When a signal with a frequency higher than the frequency input range is input, the frequency
cannot be measured correctly due to aliasing (see section 1.6). This may cause erroneous
operation to go undetected. Consequently, the measurement functions related to the
revolution sensor signal may not be determined correctly. Always input a signal within the
selected frequency input range.
15.2 Setting the Input Range of Revolution Sensor and Torque Meter Signals