NORD Drivesystems BU0260 - Manual (Page 109)

9 Index
BU 0260 GB Subject to technical amendments 109
9 Index
Keyword Index:
ACK error
Detection of a negative ACK bit
(Incorrectly sent telegram,
Incorrectly received telegram,
Telegram not received
(subscriber faulty)
(Mechanism of the detection of errors in a CAN telegram
(or a PDO))
Address Assigned or defined designation of a bus subscriber
Arbitration Control of access, comparison of the priority of simultaneously
transmitted messages and assignment of validity
Baud rate The transmission rate for serial interfaces in bits per second
Binary code The designation for a code in which messages are communicated by
"0" and "1" signals.
Bit / Byte A bit (binary digit) is the smallest unit of information in the binary
system. A byte has 8 bits.
Bit-stuffing
After 5 consecutive equivalent bits a complementary bit is added by the
transmitter; the recipient removes this automatically. Irregularities
trigger an error
(Mechanism of the detection of errors in a CAN telegram
(or a PDO))
Broadcast In a network, all slave participants are addressed simultaneously by the
master.
Client-server model a subscriber (client) can request data from another subscriber
(Server) which holds this available - "Query and response telegram"
COB-ID Communication Object Identifier
Identifier of a CAN / CANopen message
CRC Cyclic Redundancy Check
Formation of a checksum and comparison of the transmitted and
received telegram
(Mechanism of the detection of errors in a CAN telegram(or a PDO))
EMCY message Emergency messages (error telegrams)
EDS Electronic Data Sheet
Electronic data sheet for the device
Frame-Check
Check of the received telegram against the defined CAN telegram
structure. If OK, then an ACK bit is set.
(Mechanism of the detection of errors in a CAN telegram
(or a PDO))
Handshake process "Query and response telegram"
A query telegram must always be confirmed with a response.
Identifier Unique definition of a message ("Addressing") (Addressing of the
message, not the subscriber)