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Pulse Input Function
15.1.3 Input mode of pulse input
• You can select from the following 3 modes depending on the input device to be connected.
• The counting operation changes according to the settings of multiplier as shown in the
following page.
Input mode
Mode
Connection
2-phase
Incremental
Relative value encoder
(phase
encoder
difference)
Incremental
encoder or pulse
generator
Direction
detection
Sensor
or
switch
Incremental
encoder or pulse
generator
Individual
Incremental
encoder or pulse
generator
15-4
Unit
单元
Input A
Input A
Pulse input of phase A
Pulse input of
phase A
Input B
Input B
Pulse input of
Pulse input of phase B
phase B
Input C
Input C
Pulse input of phase
Pulse input of phase
Z (reset input)
Z (reset input)
Unit
Input A
Pulse input
Input A
Counting direction
Unit
Input A
Addition pulse input
Input B
Subtraction pulse input
Counting
The 2-phase input connects the
input A signal and input B signal of
each counter to the input A signal
and input B signal of corresponding
encoder.
The counting direction depends on
the phase difference between Phase
A and Phase B. If Phase A leads over
Phase B (electronic angle at 90°),
add the counted value; and if Phase
A lags behind Phase B (electronic
angle at 90°), subtract the counted
value.
During direction detection input,
counting signal is connected with
input A signal. The counting direction
is controlled by the level of the
direction signal of input B signal.
If input B signal is turned OFF, the
counter will perform addition
operation when input A signal is on
the rising edge or falling edge, and
perform subtraction operation when
input B is on the rising edge or falling
edge.
For individual input, the counter will
perform addition operation when
input A signal is on the rising edge or
falling edge and subtraction operation
when input B is on the rising edge or
falling edge.
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