Omron Sysmac NX Series User Manual page 38

Terminology
Term
object dictionary
Operational
service data object
differential input
subindex
sampling period
receive PDO
Sync Manager
single-ended input
Slave Terminal
Safe-Operational
transmit PDO
task period
Communications Coupler Units
distributed clock
Digital Filter Processing Period
device profile
device variable
Trigger Input Time Stamp
network configuration information
primary periodic task
36
Abbre-
viation
OD Data structure that contains description of data type objects, communi-
cation objects and application objects.
--- A state in which I/O refresh communications and NX message commu-
nications are possible between the communications master and the
Communications Coupler Unit or NX Units.
SDO CoE asynchronous mailbox communications where all objects in the
object dictionary can be read and written.
--- A method of reading the difference between a positive analog output
signal and a negative analog output signal, which are input to the Unit
from the output device.
--- Sub-address of an object within the object dictionary.
--- The period during which the sampling of analog input data is performed
in an NX-series High-speed Analog Input Unit.
RxPDO A process data object received by an EtherCAT slave.
SM Collection of control elements to coordinate access to concurrently
used objects.
--- A method of reading the difference between the ground and a positive
analog output signal, which is input to the Unit from the output device.
--- A building-block remote I/O terminal, which consists of a Communica-
tion Coupler Unit connected with NX Units.
--- A state in which input refresh communications and NX message com-
munications are possible between the communications master and the
Communications Coupler Unit or NX Units, but output refresh commu-
nications are not possible.
TxPDO A process data object sent from an EtherCAT slave.
--- The interval at which the primary periodic task or a periodic task is exe-
cuted.
--- The generic name of an interface unit for remote I/O communications
on a network between NX Units and a host network master.
DC Clock distribution mechanism used to synchronize EtherCAT slaves
and the EtherCAT master.
--- The period during which the processing of the digital low-pass filter and
moving average filters is executed.
--- A collection of device dependent information and functionality providing
consistency between similar devices of the same device type.
--- A variable that is used to access a specific device through an I/O port
by an NJ/NX-series CPU Unit or NY-series Industrial PC.
Process data on an EtherCAT slave is allocated to this variable. For
NX-series CPU Units to which NX Units can be connected, I/O data for
the NX Units on a CPU Unit is allocated. A user application on a CPU
Unit or Industrial PC accesses a device that can be connected, by di-
rectly reading and writing this device variable.
--- The DC time at which the trigger input changes from OFF to ON during
the NX bus I/O refresh cycle of an NX-series High-speed Analog Input
Unit. If the trigger input changes from OFF to ON more than once dur-
ing the cycle, the DC time at the first change is recorded.
--- The EtherCAT network configuration information held by the EtherCAT
master.
--- The task with the highest priority.
NX-series Analog I/O Units User's Manual for High-speed Analog Input Units (W592)
Description