IFM Electronic Ecomat Mobile Series System Manual page 287

Glossary of Terms
N
NMT
NMT = Network Management = (here: in the
CAN bus)
The NMT master controls the operating states
of the NMT slaves.
Node
This means a participant in the network.
Node Guarding
Network participant
Configurable cyclic monitoring of each slave
configured accordingly. The master verfies if
the slaves reply in time. The slaves verify if the
master regularly sends requests. In this way
failed network participants can be quickly
identified and reported.
O
Obj / object
Term for data / messages which can be
exchanged in the CANopen network.
Object directory
Contains all CANopen communication
parameters of a device as well as device-
specific parameters and data.
OBV
Contains all CANopen communication
parameters of a device as well as device-
specific parameters and data.
Operating system
Basic program in the device, establishes the
connection between the hardware of the
device and the user software.
ifm System Manual ecomatmobile SmartController (CR2500) V05
Operational
Operating state of a CANopen participant. In
this mode SDOs, NMT commands and PDOs
can be transferred.
P
PC card
→PCMCIA card
PCMCIA card
PCMCIA = Personal Computer Memory Card
International Association, a standard for
expansion cards of mobile computers.
Since the introduction of the cardbus standard
in 1995 PCMCIA cards have also been called
PC card.
PDO
PDO = Process Data Object
The time-critical process data is transferred by
means of the "process data objects" (PDOs).
The PDOs can be freely exchanged between
the individual nodes (PDO linking). In addition
it is defined whether data exchange is to be
event-controlled (asynchronous) or
synchronised. Depending on the type of data
to be transferred the correct selection of the
type of transmission can lead to considerable
relief for the CAN bus.
These services are not confirmed by the
protocol, i.e. it is not checked whether the
message reaches the receiver. Exchange of
network variables corresponds to a "1 to
n connection" (1 transmitter to n receivers).
Performance Level
Performance Level
According to ISO 13849-1, a specification
(PL a...e) of safety-related parts of control
systems to perform a safety function under
foreseeable conditions.
PES
Programmable Electronic System
A programmable electronic system is a system
...
- for control, protection or monitoring,
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