Omron K3HB Datasheet page 18

Operation
■ Functions (Operating Modes)
F1 to F3
Function name Function No.
f1
Individual inputs
Phase differential inputs f2
f3
Pulse counting input
Function
F1 Counts input A as incremental pulses and input B as
Individual decremental pulses. The count is incremented on the
inputs rising edge of input A and decremented on the rising
edge of input B. If both inputs rise at the same time, the
count is not changed. The count is incremented when
input B is later than input A and decremented when input
B is earlier than input A.
H
Input A
L
H
Input B
L
H
HOLD input
L
Count 0
F2 This function is normally used when connected to an
Phase dif- incremental rotary encoder. The count is incremented on
ferential in- the falling edge of input B when input A is OFF. The count
puts is decremented on the rising edge of input B when input
A is OFF.
H
Input A
L
H
Input B
L
HOLD
H
input L
Count
0
F3 Counted on the rising edge of input A
Pulse
H
Input A
counting
L
input
HOLD
H
input L
1
Count 0
Note: 1. Meaning of H and L in Display
Symbol Input method No-voltage input
H
L
2. Requires at least half the minimum signal width. If there is less than half, a ±1 count error may occur.
Input Type Setting
No-contact or voltage pulse input 00
Contact
18
Up/Down Counting Pulse Indicator
Operation
3
2 2
1 1 1
(See note 2.)
3
2 2
1 1
5
4
3
2
Short-circuit
Open
NO: Voltage pulse high
10
K3HB-C
Operation image (application)
Counting the number of people entering an area
Increment
Decrement
3
2
Detecting position and speed on a semiconductor wafer conveyor line
Wafer
1
0
Counting the number of workpieces
6
NC: Voltage pulse low
01
11
Photoelectric
sensor To
BCD output
Programmable
Controller
E6L
BCD output To
Programmable
Controller