Omron NX-EC0112, User Manual

Page: 170 / 468

6 Incremental Encoder Input Units
6 - 44 NX-series Position Interface Units User’s Manual (W524)
Select the counting operation for the encoder with the Counter Type parameter. For this example,
select a ring counter.
The default for the Incremental Encoder Input Unit is a ring counter, so do not change the setting.
Refer to 6-9-2 Counter Type on page 6-47 for information on the counter types.
Use the Maximum Counter Value and Minimum Counter Value parameters to set the counting range for
the encoder.
The default range for the Incremental Encoder Input Unit is
−
2,147,483,648 to 2,147,483,647.
Leave these parameters at their default settings.
Refer to Ring Counter on page 6-48 for information on the maximum counter value and minimum coun-
ter value.
Precautions for Correct Use
To use an Incremental Encoder Input Unit with the MC Function Module, select a ring counter
(default) for the Counter Type parameter. Also, leave the Maximum Counter Value and Mini-
mum Counter Value parameters at their default settings for a range of
− 2,147,483,648 to
2,147,483,647. The MC Function Module may not perform control normally and unintended
operations may occur if you change the default settings.
Set the Pulse Input Method parameter according to the output specifications of the connected encoder.
There are three pulse input methods: phase differential pulse x2/4, pulse + direction inputs, or up and
down pulses.
The default setting for the Incremental Encoder Input Unit is for a phase differential pulse multiplication
x4.
Refer to 6-9-3 Pulse Input Method on page 6-50 for information on selecting the pulse input method.
Use the Encoder Count Direction parameter to specify how to increment and decrement the count
value according to the rotational direction of the encoder.
The default setting for the Incremental Encoder Input Unit is a positive direction of phase A advance-
ment.
Refer to 6-9-4 Encoder Count Direction on page 6-53 for information on the encoder direction setting.
Set the External Input Function Selection and External Input Logic Selection parameters.
The NX-EC0112, NX-EC0122, NX-EC0132, and NX-EC0142 each have three external inputs. The
NX-EC0212 and NX-EC0222 do not have any external inputs.
Counter Type Selection
Maximum Counter Value and Minimum Counter Value Settings
Pulse Input Method Selection
Encoder Count Direction Settings
External Input Signal Settings