Omron NX-EC0122 User Manual

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6 Incremental Encoder Input Units
NX-series Position Interface Units User’s Manual (W524)
6-6 I/O Refreshing Method Setting
6
6-6-1 Setting the I/O Refreshing Methods
6-6 I/O Refreshing Method Setting
There are the following methods to exchange data between Incremental Encoder Input Units and the
Controller: Free-Run refreshing, synchronous I/O refreshing, and task period prioritized refreshing.
This section describes how to set the I/O refreshing method for Incremental Encoder Input Units, the
I/O refreshing methods, and the differences in I/O refreshing methods for different Controllers.
This section describes the settings of the I/O refreshing method for each Communications Coupler Unit.
 EtherCAT Coupler Unit
When an Incremental Encoder Input Unit is connected to an EtherCAT Coupler Unit, the I/O refresh-
ing method depends on the Enable Distributed Clock setting.
The following table lists the possible combinations.
Version Information
Unit version 1.2 or later and an NX-ECC203 EtherCAT Coupler Unit are required to use task
period prioritized refreshing. If you use unit version 1.1 or earlier and an NX-ECC203 EtherCAT
Coupler Unit, operation is performed with synchronous I/O refreshing.
 EtherNet/IP Coupler Unit
When an Incremental Encoder Input Unit is connected to an EtherNet/IP Coupler Unit, you can use
only Free-Run refreshing. There is no setting.
The following table lists the refresh cycles for Free-Run refreshing, synchronous I/O refreshing, and
task period prioritized refreshing.
6-6-1 Setting the I/O Refreshing Methods
DC enabled/disabled I/O refreshing method
Enabled (DC for synchronization) Synchronous I/O refreshing
Enabled (DC with priority in cycle time) Task period prioritized refreshing
Disabled (FreeRun) Free-Run refreshing
Refresh Cycle
I/O refreshing method Refresh cycle
Free-Run refreshing
Always 125 μs
*1
*1. The value is always 250 μs for unit version 1.1 or earlier.
Synchronous I/O refreshing
*2
*2. The refresh cycle depends on the specifications of the EtherCAT master and EtherCAT Coupler Unit. It also
depends on the Unit configuration.
250 μs to 10 ms
*3
*3. The range is 250 μs to 4 ms for unit version 1.1 or earlier. The range is also 250 μs to 4 ms for unit version 1.2
or later if you use the NX-ECC201/202 EtherCAT Coupler Unit.
Task period prioritized refreshing
*2
125 μs to 10 ms
*4
*4. The range for the NX-EC022 is 250 μs to 10 ms.

Omron NX-EC0122 Specifications

General

Brand	Omron
Model	NX-EC0122
Category	Controller
Language	English