Features - Omron K3NR Operation Manual

Features

1-1

Features

Operating mode
1 Displays rotational or circumferential speed of a single input.
2 to 5 Displays the calculation results of two rotational inputs.
6 Displays passing time calculated from the frequency and process length of a single input.
7 Counts and displays the number of pulses.
Measurement
Prescaling
Comparative Output
Selection
Linear Output
BCD Output
Communications Output
HOLD
2
The K3NR Frequency/Rate Meter displays desired values after converting input
pulses.
The K3NR has the following functions.
The internal system clock counts the ON/OFF time (T) of sensor input or other
input and automatically calculates the frequency. The number of revolutions is
calculated from the result of the frequency multiplied by 60.
Sensor input pulse ON/OFF time (T) =
• Rotational speed (rpm) = f x 60
• Circumferential speed = Circumference x revolutions
• Passing time = Length of processing/Circumferential speed
• Pulse counting
If there is any pulse input, the input will be automatically converted numerically
and displayed.
The number of input pulses is converted into a desired value.
Enables the K3NR to display the revolutions or rotational speed. It is necessary
to multiply the number of pulses per revolution or circumference by a certain fac-
tor. This factor is called the prescaling value.
Example:
rpm = f x 60 x a
f: Input pulse frequency (number of pulses per second)
a: Prescale value
If there are five pulses per rotation, the accurate rotational
speed can be calculated if a = 1/5 (– 0.2=2 x 10
Comparison output patterns can be selected from the standard, level, or zone
output depending on the application.
Refer to Comparative Output Patterns, page 80.
Refer to Linear Output Range, page 83.
A digital data output format where every four binary bits is numerically equivalent
to one decimal digit.
Refer to Section 7 BCD Output.
Refer to the Communications Manual.
HOLD is an external input which is used to stop the A/D process and freeze the
display. The comparative, linear, and BCD outputs are also retained.
Refer to 5-3 External Input Signals for details.
Function
1
Frequency (f) =
T
K3NR
Proximity Sensor
–1
Section 1-1
).