Omron Sysmac NX-PD1000 User Manual page 31

Term
Operational
PDO communications
Pre-Operational
primary periodic task
process data
process data communications
process data object
receive PDO
Safe-Operational
Slave Information Interface
Slave Terminal
subindex
Sync0
Sync Manager
task period
transmit PDO
NX-series System Units User's Manual (W523)
Abbre-
viation
--- A state in which I/O refresh communications and NX message communi-
cations are possible between the communications master and the Com-
munications Coupler Unit or NX Units.
--- An acronym for process data communications.
--- A state in which NX message communications are possible between the
communications master and the Communications Coupler Unit or NX
Units, but I/O refresh communications are not possible.
--- The task with the highest priority.
--- Collection of application objects designated to be downloaded cyclically
or acyclically for the purpose of measurement and control.
--- One type of NX bus communications in which process data objects
(PDOs) are used to exchange information cyclically and in realtime. This
is also called PDO communications.
PDO A structure that describes the mappings of parameters that have one or
more process data entities.
RxPDO A process data object received by an EtherCAT slave.
--- A state in which input refresh communications and NX message commu-
nications are possible between the communications master and the
Communications Coupler Unit or NX Units, but output refresh communi-
cations are not possible.
SII Slave information that is stored in non-volatile memory in the slave.
--- A building-block remote I/O terminal to which a Communications Cou-
pler Unit and NX Units are mounted
--- Sub-address of an NX object within the object dictionary.
--- A signal that gives the interrupt timing based on the distributed clock
(DC) in EtherCAT communications. The slaves execute controls accord-
ing to this interrupt timing.
SM Collection of control elements to coordinate access to concurrently used
objects.
--- The interval at which the primary periodic task or a periodic task is exe-
cuted.
TxPDO A process data object sent from an EtherCAT slave.
Terminology
Description
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