
2.4 Details of Counter Functions
2.4.1 Pulse Counting Modes
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2.4.1 Pulse Counting Modes
The following pulse counting modes can be selected by setting the counter fixed parameter No. 3 (Pulse Counting
Mode Selection) and No.2 “A/B Pulse Signal Polarity Selection.”
.
Pulse Counting Mode Polarity Up Count (Forward) Down Count (Reverse)
Pulse and
Direction
× 1
Positive
logic
Negative
logic
× 2
Positive
logic
Negative
logic
UP/DOWN
Counter
× 1
Positive
logic
Negative
logic
× 2
Positive
logic
Negative
logic
A/B Pulse
× 1
Positive
logic
Negative
logic
× 2
Positive
logic
Negative
logic
× 4
Positive
logic
Negative
logic
Pulse A
Pulse B
Fixed at low or high
Pulse A
Pulse B
Fixed at low or high
Pulse A
Pulse B
Fixed at low or high
Pulse A
Pulse B
Fixed at low or high
Pulse A
Pulse B
Fixed at low or high
Pulse A
Pulse B
Fixed at low or high
Pulse A
Pulse B
Fixed at low or high
Pulse A
Pulse B
Fixed at low or high
If connecting the I/O module to a Yaskawa SERVOPACK, set either the fixed parameter or the SERVOPACK
parameter as follows.
Fixed parameter No.2 (A/B Pulse Signal Polarity Selection): 1 (Negative logic)
SERVOPACK parameter 1st digit of Pn000: 1 (CW for reverse rotation: reverse rotation mode)
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