2-33
IM DL850E-01EN
• Velocity (Velocity)
Velocity (km/h) = distance per pulse l (km) ÷ Tw (s) × 3600
Velocity (m/s) = distance per pulse l (m) ÷ Tw (s)
You can define unique distances and units (angular velocity and other units).
Measurable range: F (= 1/Tw) = 0.01 Hz to 200 kHz
Tw(s)
Distance per pulse (l)
Settings for Each Item
When Measuring Revolutions
Pulse/Rotation Setting (Pulse/Rotate)
Set the number of pulses per revolution to a value from 1 to 99999.
When Measuring Duty Ratios or Pulse Widths
• Measured Pulse Setting (Measure Pulse)
Set the type of pulse to measure to Positive or Negative.
When Measuring Duty Ratios
• Positive: The rising-pulse percentage is measured.
• Negative: The falling-pulse percentage is measured.
When Measuring Pulse Widths
• Positive: The rising-pulse width is measured.
• Negative: The falling-pulse width is measured.
Tp
Ta
Tb
Tp
Ta
Tb
When Positive Is Selected
When Negative Is Selected
Pulse width:
The width of Tp is
measured.
Duty:
Ta/Tb is measured.
Notes about Duty Ratio Measurement
During duty ratio measurement, the output changes to 0% or 100% when one of the following conditions is
met:
• A pulse is not received for a period of time equal to four times the period of the previous pulse (T).
• A pulse is not received for 20 seconds.
When Measure Pulse is set to Positive if one of the above conditions is met and the pulse input is low, the
ratio is 0%; if the pulse input is high, the ratio is 100%. When Measure Pulse is set to Negative if one of the
above conditions is met and the pulse input is high, the ratio is 0%; if the pulse input is low, the ratio is 100%.
T: Pulse period
0% (when Measure Pulse is set to Positive)
Status when the condition is met: Low
The output is set to 0% when a time equal
to T × 4 or 20 s elapses after the last pulse
was input.
2 Vertical Axis