28
3-3
Error Ratio:
f3
Application example
Measures the speed
of the conveyor belts
and the error ratio in
the rotation of the
conveyor belts.
Basic Operation
Displays the error ratio of the frequency of INA and INB in percentage. Obtain
display value D as follows:
D (%) =
x 100
f
B
x
β
– f
A
x
α
f
A
x
α
f
A
: Input frequency of INA (Hz)
f
B
: Input frequency of INB (Hz)
α
: Prescale value of INA
β
: Prescale value of INB
Mode
Unit of display
Prescale value
Error ratio
%
Na and Nb or
π
da/Na and
π
db/Nb
Where,
Na: Number of pulses per revolution from A input
Nb: Number of pulses per revolution from B input
π
da: Circumference (m) per revolution for A input
π
db: Circumference (m) per revolution for B input
Example:
Displaying error ratio of two conveyor speeds (m/min) using two rotary en-
coders each with 100 output pulses per revolution and a circumference of
0.125 m.
Prescale value of INA (
α
) = 0.125/100 = 0.00125 = 1.2500 x 10
–3
Prescale value of INB (
β
) = 0.125/100 = 0.00125 = 1.2500 x 10
–3
Prescale value = X x 10
Y
(X: mantissa, Y: exponent)
X (mantissa) of input A = 1.2500
Y (exponent) of input A = –3
X (mantissa) of input B = 1.2500
Y (exponent) of input B = –3
Refer to
4-2 Setting Mode
.
FUNCTION
SETTING
REFERENCE
Error Ratio:
f3
Section 3-3
Содержание K3NR
Страница 1: ...Cat No N093 E1 1A Frequency Rate Meter K3NR ...
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Страница 148: ...Cat No N093 E1 1A K3NR Frequency Rate Meter OPERATION MANUAL ...