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Glossary
ATQA
The ATQA (Answer To
reQuestA) is used to identify
the ID tag type.
CAN
Controller Area Network, bus
system for use in mobile
applications.
CANopen
CAN-based network protocol
on the application level with an
open configuration interface
(object directory)
CiA
CAN in Automation e.V., user
and manufacturer organisation
in Germany/Erlangen, definition
and control body for CAN and
CAN-based network protocols.
COB
CANopen communication
object (PDO, SDO, EMCY, ...)
EDS
Electronic data sheet
EMCY
The emergency object contains
an alarm message with which
the device signals an error.
Heartbeat
Configurable cyclic monitoring
among network participants. In
contrast to "node guarding" no
superior NMT master is
required.
ID tag
An ID tag is used to identify
objects. A read/write device is
used to read the ID tag via a
high-frequency radio signal. An
ID tag consists of an antenna,
an analogue circuit for
receiving and transmitting
(transceiver), a digital circuit
and a non-volatile memory.
Identifier
The identifier (ID) marks a CAN
message. The numerical value
of the ID also contains a priority
concerning the bus access (ID
0 = highest priority)