Setting The I/O Refreshing Methods - Omron NX-AD series User Manual

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Setting the I/O Refreshing Methods

Setting Methods between the CPU Unit and the NX Units
How to set an I/O refreshing method between the CPU Unit and the NX Units is determined by the con-
nected CPU Unit.
Refer to the software user's manual for the connected CPU Unit for information on how to set an I/O
refreshing method between the CPU Unit and the NX Units.
An example of the setting operation for the NX-series NX1P2 CPU Unit is shown below. For the NX1P2
CPU Unit, no setting operation is required, and the method is determined according to the following
table.
NX Units that support
only Free-Run refresh-
ing
Free-Run refreshing
*1. Two types of time stamp refreshing are available: one is input refreshing with input changed time and the other
is output refreshing with specified time stamp.
Setting Methods between the Communications Coupler Unit and the
NX Units
How to set an I/O refreshing method between the Communications Coupler Unit and the NX Units is
determined by the connected Communications Coupler Unit.
Refer to the user's manual for the connected Communications Coupler Unit for information on how to
set an I/O refreshing method between the Communications Coupler and the NX Units.
An example when the EtherCAT Coupler Unit is connected to the built-in EtherCAT port on an
NJ/NX-series CPU or NY-series Industrial PC is shown below.
The I/O refreshing method between the EtherCAT Coupler Unit and each NX Unit depends on whether
the DC is enabled in the EtherCAT Coupler Unit.
DC enable setting
in the EtherCAT
Coupler Unit
Enabled (DC for
*2
synchronization)
Enabled (DC with
priority in cycle
*2
time)
Disabled
*3
(FreeRun)
NX-series Analog I/O Units User's Manual for Analog Input Units and Analog Output Units (W522)
NX Units that support
both Free-Run refresh-
ing and synchronous I/O
refreshing
Synchronous I/O refreshing
NX Units that sup-
NX Units that sup- port both Free-Run
port only Free-Run refreshing and
refreshing synchronous I/O
refreshing
Free-Run refreshing Synchronous I/O
refreshing
Free-Run refreshing
NX Units that support
Free-Run refreshing,
synchronous I/O
only time stamp refresh-
refreshing, and task
period prioritized
refreshing
Time stamp refreshing
NX Units that sup-
port Free-Run
refreshing, syn-
chronous I/O
refreshing, and
task period priori-
tized refreshing
Synchronous I/O
refreshing
Task period priori-
tized refreshing
Free-Run refreshing
5 I/O Refreshing
NX Units that support
*1
ing
NX Units that sup-
port only time
*1
stamp refreshing
Time stamp refresh-
ing
Operation with time
stamp refreshing is
*4
not possible.
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