Omron NX-EC0112, User Manual

Page: 176 / 468

6 Incremental Encoder Input Units
6 - 50 NX-series Position Interface Units User’s Manual (W524)
2
Set the Counter Type, Maximum Counter Value, and Minimum Counter Value.
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.
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.
 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.
6-9-3 Pulse Input Method
Parameter name Setting Default Remarks
Pulse Input Method 0: Not Supported
1: Phase differential pulse x2
2: Phase differential pulse x4
3: Pulse + direction
4: Up and down pulses 2 Changes are applied when the power sup-
ply to the NX Unit is turned ON or the NX
Unit is restarted.
Phase Differential Pulse Input Multiplication (x2/4)
Incremental
encoder
Input A
Input B
Input Z
Counter
A
B
Z
Reset input or
latch input