Absolute Ratio: F2 - Omron K3NR Operation Manual

Absolute Ratio: f2

Absolute Ratio: f2
3-2
FUNCTION
SETTING
REFERENCE
Operation example
Basic Operation
Displays the absolute ratio of the frequencies of INA and INB in percentage. Ob-
tain display value D as follows:
f : Input frequency of INA (Hz)
A
f : Input frequency of INB (Hz)
B
α: Prescale value of INA
β: Prescale value of INB
Mode Unit of display
Absolute ratio %
Where,
Na: Number of pulses per revolution from A input
Nb: Number of pulses per revolution from B input
πda: Circumference (m) per revolution for A input
πdb: Circumference (m) per revolution for B input
Example:
Displaying absolute revolution rate using two rotary encoders each with
1,000 output pulses per revolution.
Prescale value of INA (α) = 1/1000 = 0.001 = 1.0000 x 10
Prescale value of INB (β) = 1/1000 = 0.001 = 1.0000 x 10
Y
Prescale value = X x 10
X (mantissa) of input A = 1.0000
Y (exponent) of input A = –3
X (mantissa) of input B = 1.0000
Y (exponent) of input B = –3
Refer to 4-2 Setting Mode.
f
B x β
x 100
D (%) =
f
A x α
Prescale value
Na and Nb or
π
da/Na and
π
db/Nb
(X: mantissa, Y: exponent)
Section 3-2
Measures the
rotation ratio of
the rolls.
–3
–3
25