6 Incremental Encoder Input Units
2
Set the Counter Type, Maximum Counter Value, and Minimum Counter Value.
6-9-3
Pulse Input Method
There are the following three pulse input methods for counters:
• Phase differential pulse input multiplication x2/4
• Pulse + direction inputs
• Up and down pulses
Use the Pulse Input Method parameter to change the input method.
Parameter name
Pulse Input Method
Phase Differential Pulse Input Multiplication (x2/4)
There are two multiplications for the phase differential pulse inputs: x2 and x4.
The default setting is for x4 multiplication.
Connect the phase-A and phase-B2 phase differential pulse inputs to inputs A and B on the encoder.
Connect the reset input or latch input to input Z.
Change the Encoder Count Direction parameter in the Unit operation settings to change the count
direction.
Refer to 6-9-4 Encoder Count Direction on page 6-53 for information on changing the count direction.
Incremental
encoder
x2 Multiplication
The counter operation is performed on the rising and falling edges of the phase-A signal.
The count is incremented if phase A is advanced from phase B and decremented if phase A is
delayed from phase B.
x4 Multiplication
This setting is used to increase the resolution of encoder input compared with multiplication x2.
The counter operation is performed on the rising and falling edges of the phase-A and phase-B sig-
nals.
The count is incremented if phase A is advanced from phase B and decremented if phase A is
delayed from phase B.
6 - 50
Setting
0: Not Supported
1: Phase differential pulse x2
2: Phase differential pulse x4
3: Pulse + direction
4: Up and down pulses
Counter
Input A
A
Input B
B
Input Z
Z
Reset input or
latch input
Default
2
Changes are applied when the power sup-
ply to the NX Unit is turned ON or the NX
Unit is restarted.
NX-series Position Interface Units User's Manual (W524)
Remarks