IFM Electronic CR0403 Programming Manual page 220

ifm Programming Manual ecomatmobile
Glossary of Terms
>
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.
>
OPC
OPC = OLE for Process Control
Standardised software interface for manufacturer-independent communication in automation
technology
OPC client (e.g. device for parameter setting or programming) automatically logs on to OPC server
(e.g. automation device) when connected and communicates with it.
>
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.
>
PDM
PDM = Process and Dialogue Module.
Device for communication of the operator with the machine / plant.
>
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.
According to the protocol, these services are unconfirmed data transmission: it is not checked whether
the receiver receives the message. Exchange of network variables corresponds to a "1 to
n connection" (1 transmitter to n receivers).
BasicController (CR0403) Runtime System V03.02
220
2015-04-01