IM 701240-01E
5-42
Setup Items for Each Measurement Item
Number of Rotations
Pulse/Rotation (Pulse/Rotate)
Set the number of pulses per rotation in the range of 1 to 99999 pulses.
Duty Cycle or Pulse Width
Measure Pulse
Set the polarity of the pulse to be measured to positive or negative.
•
Duty
Positive:
Measures the ratio of the positive pulses.
Negative: Measures the ratio of the negative pulses.
•
Pulse Width
Positive:
Measures the width of the positive pulse.
Negative: Measures the width of the negative pulse.
Tp
Ta
Tb
Tp
Ta
Tb
• When Positive is selected
• When Negative is selected
Pulse width:
Measures the width of Tp
Duty:
Measures Ta/Tb
Pulse width:
Measures the width of Tp
Duty:
Measures Ta/Tb
Precautions to Be Taken When Measuring the Duty Cycle
The output is set to 0% or 100% when either of the conditions below is met when measuring
the duty cycle.
•
When there is no pulse input after a time equal to 4 times the period (T) of the pulse that
was input immediately before.
•
When there is no pulse input for 20 s.
When the polarity is set to Positive, the output is set to 0% when the pulse input is low when the
condition is met and 100% when the pulse input is high. When the polarity is set to Negative, the
output is set to 0% when the pulse input is high when the condition is met and 100% when the
pulse input is low.
T: Pulse period
The output is set to 0% when a time equal to
T
×
4 or 20 s elapses after the last pulse was input.
0% (when the polarity is positive)
Status when the condition is met: Low
Power Supply Frequency
Center Frequency
Set the center value of the power supply frequency to 50 Hz, 60 Hz, or 400 Hz.
Pulse Integration
Unit/Pulse
Set the physical amount per pulse in the range of –9.9999E+30 to 9.9999E+30.
Over Limit Reset
Select ON to reset the pulse count automatically when the range is exceeded. Select OFF to not
reset the pulse count. The default setting is OFF.
Executing Manual Reset
To reset the pulse count manually, select Exec.
Unit
As necessary, enter the unit of pulse integration to be displayed on the screen using up to 4
characters.
5.17 Setting the Frequency (Number of Rotations, Period, Duty Cycle, Power Supply Frequency, Pulse
Width, Pulse Integration, and Velocity) Measurement