C-138

Up/Down Counting Meter

K3NC

I Block Diagram

I Rotary Encoder Connection Example

Input circuit

Sensor A

Sensor B

GND

Control input

Frequency measurement circuit

Waveform adjustment circuit

8-bit microcomputer

Control input circuit

Power supply

for sensor

Control power

supply

Control input

circuit

Power supply

circuit

Frequency

measurement

circuit

Waveform

adjustment

circuit

Voltage stabilizing

circuit

Voltage stabilizing

circuit

Voltage stabilizing

circuit

LED

Key

switch

8-bit

microcomputer

Output

circuit

Power supply for

sensor (input circuit)

0 V

Phase A

Phase B

INA/INB

Counts input signals.

Accepts Up/Down (individual or phase difference) inputs.

RESET

Resets the present value to zero.

No counting inputs are accepted when a RESET input is ON.

RESET is lit when a RESET input is ON.

Note: External reset minimum signal width: 16 ms

COMPENSATION

Resets the present counting value to the compensation value at the rising edge of a compensation input. In the

compensation value setting parameter, it is possible to set to “Effective during incrementing and decrementing a

count” or to “Effective only during incrementing a count.”

Note: External compensation input minimum signal width: 16 ms

BANK 1, 2

Selects one of the four banks.

Bank no.

Control input

Bank 1

Bank 2

1OFF

OFF

2ON

OFF

3OFF

ON

4ON

ON

Note: Bank switching minimum signal width: 100 ms max.