K3NC
K3NC
9
3
INPUT MODE AND COUNTING VALUES
.øã å
: Up/Down B individual input
.øã ä
: Up/Down C phase difference input
Counting
value
INA
INB
Counting
value
INA
INB
Note: 1. “B” must be larger than half the minimum signal width. If it is smaller, an error of
±
1 count may occur.
2. Refer to the following for the meanings of the H and L characters in the above timing charts.
Signal
No-voltage input
H
Short-circuit
L
Open
3
BLOCK DIAGRAM
Input circuit
Power supply
for sensor
Sensor A
Sensor B
GND
Control input
Control input
circuit
Power supply
circuit
Control power
supply
Waveform
adjustment
circuit
Voltage stabilizing
circuit
Voltage stabilizing
circuit
Voltage stabilizing
circuit
Key
switch
LED
Output
circuit
8-bit
microcomputer
Frequency
measurement
circuit
Power supply for
sensor (input circuit)
Frequency measurement circuit
Waveform adjustment circuit
8-bit microcomputer
Control input circuit
