Omron K3HB-C User Manual page 90

Explanation of Functions
Prescaling enables input values to be displayed using any unit by multiplying the input pulse frequency or
count by a specific coefficient.
Example:
This example shows the prescale value and the prescale set values for displaying the speed of a rotary
encoder that outputs 500 pulses per second. (The K3HB-R is used in function F1.)
Prescaling
func
0
f1
0."
Displays "
L
ps.ax
0
1.0000
"T" is lit.
ps.ax
0
1.0000
ps.ax
0
2.0000
ps.ay
0
10 0
ps.ay
0
10 00
ps.ay
0
10 -3
Prescaling
D = fa 60
fa: Frequency A (Hz)
: Prescale value A
D: Measurement value (rpm)
Prescale value ( ) = 1/500 = 0.002 = 2.0
Prescale value of Input A, X (mantissa): ps. ax = 2. 0000
Prescale value of Input B, Y (exponent): ps. ay = 10 -3
Parameter Setting Procedure: Prescale Settings for Input A
The following procedure uses the K3HB-R as an example.
A Press the L [LEVEL] Key for at least 3 s in RUN level to move to
L
the initial setting level.
3 s min.
0" is displayed on the level/bank display to indicate the initial
• "
L
setting level.
B Press the M [MODE] Key several times to switch the PV display
M
to "ps. ax."
• Teaching is possible for the prescale AX (mantissa) scaling
input value. "T" is lit to indicate that teaching is possible.
• Refer to P.5-30 for the teaching method.
C Press the S [SHIFT] Key to make the SV display flash.
S
• The setting can be changed when the SV display starts to
flash.
D Use the U [UP] and S [SHIFT] Keys to change the set value.
U
E Press the M [MODE] Key to switch the PV display to "ps. ay."
M
F Press the S [SHIFT] Key to make the SV display flash.
S
• The setting can be changed when the SV display starts to
flash.
G Use the U [UP] and S [SHIFT] Keys to change the set value.
U
5.5 Setting Prescale Values
3
10
5-29