Communication extension card
Terminology and abbreviations
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Terminology and abbreviations
CAN
Controller Area Network
COB
Communication object, a transmitted unit on a CAN network.
Communication objects (COBs) carry data and can be transmitted
through the whole network. A COB is part of a CAN message frame.
EDS
Electronic datasheet, an ASCII file for node configuration, required
when a CANopen network is configured. An EDS file contains
general information about nodes and their dictionary objects
(parameters).
NMT
Network management, one of the CAN application-layer service
elements in the CAN reference model. It is used for the initialization,
configuration, and fault handling of a CAN network.
Object
dictionary
Stores information about all COBs identified by a device.
PDO
Process data object, a type of COBs, used to transmit process data,
such as control command, set values, state values, and actual
values.
PDOn Tx
PDO command transmitted by a slave station to the master station,
where n refers to 1, 2, 3, 4.
PDOn Rx
PDO command transmitted by the master station and received by a
slave station, where n refers to 1, 2, 3, 4.
SDO
Service data object, a type of COB, used to transmit non-time key
data, such as parameter values.
RO
Indicates read-only access.
RW
Indicates the read and write access.
SYNC
Indicates synchronous transmission.
Node-ID
Node ID, that is, address of a communication card.
0x
Indicates that a number with this prefix is a hexadecimal value, for
example, 0x10 indicates the decimal value 16.
