Functions and Oper
ations
Section 5 Functions and Operations
5-12
■
F4: Rotational Difference
Measuring the Rpm/Circumferential Speed Difference (Absolute
Difference) between Two Conveyors
•
Basic Operation
The difference between the speed of input A and the speed of
input B is displayed.
The measurement value can be obtained using the following
formula:
D
=
fb
×
60
×
β
−
fa
×
60
×
α
fa
: Frequency A (Hz)
fb
: Frequency B (Hz)
α
: Prescale value A
β
: Prescale value B
D
: Measurement value
Example:
This example shows the prescale values and the prescale set
values for displaying the difference between speeds using two
rotary encoders, each of which outputs 60 pulses per rotation.
Prescale value of Input A (
α
) = 1/60 = 0.01666 ...
≈
1.6666
×
10
−
2
Prescale value of Input B (
β
) = 1/60 = 0.01666 ...
≈
1.6666
×
10
−
2
Prescale value of Input A, X (mantissa):
ps.
ax
=
1.
6666
Prescale value of Input A, Y (exponent):
ps.
ay
=
10 -2
Prescale value of Input B, X (mantissa):
ps.
bx
=
1.
6666
Prescale value of Input B, Y (exponent):
ps.
by
=
10 -2
HH
H
L
PASS
LL
Encoder
Alarm outputs
Operation Configuration (Application)
Summary of Contents for K35-2
Page 2: ......
Page 24: ...Outline Section 1 Outline 1 8 ...
Page 25: ...2 1 Preparations Section 2 Preparations 2 1 Mounting 2 2 2 2 Using I O 2 4 ...
Page 54: ...Basic Application Methods Basic Application Methods Section 3 Basic Application Methods 3 18 ...
Page 62: ...Initial Setup Section 4 Initial Setup 4 8 ...
Page 148: ...Functions and Operations Section 5 Functions and Operations 5 86 ...
Page 149: ...6 1 Troubleshooting Section 6 Troubleshooting 6 1 Error Displays 6 2 6 2 Countermeasures 6 3 ...
Page 152: ...Troubleshooting Section 6 Troubleshooting 6 4 ...
Page 185: ......