NORD Drivesystems BU0510 - Manual (Page 76)

POSICON position control for NORD frequency inverters, SK 530E and above
76 Subject to technical alterations BU 0510 GB-3911
9 Lists / Index
9.1 Keyword Index
Absolute (rotary) encoder,
single-turn Rotary encoder, which outputs coded information for each measurement
step within a rotation. The data is retained even after a power failure.
The data continues to be recorded even without power.
Absolute (rotary) encoder,
multi-turn Rotary encoder, as for absolute single-turn (rotary) encoder, however,
the number of rotations are additionally recorded.
Resolution For single-turn rotary encoders, the resolution indicates the number of
measurement steps per rotation.
For multi-turn rotary encoders the resolution indicates the number of
measurement steps per rotation multiplied by the number of rotations.
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.
Broadcast In a network, all slave participants are addressed simultaneously by the
master.
CAN Bus (Controller Area Network) designates a multi-master bus system with
twin conductor wiring. Operation is orientated to events and messages.
At present standardised CAN protocols are specified under CANopen.
CANopen Designates a communications protocol based on CAN
Encoders Electrical or opto-mechanical device for detecting rotary movements. A
differentiation is made between absolute (rotary) encoders and
incremental (rotary) encoders
Precision Deviation between the actual and the measured position.
Total resolution For single-turn rotary encoders, the resolution indicates the number of
measurement steps per rotation.
For multi-turn rotary encoders the resolution indicates the number of
measurement steps per rotation multiplied by the number of rotations.
Incremental (rotary)
encoder Encoders which output an electrical pulse (High/Low) for each
measurement step.
Jitter Designates a slight fluctuation in precision in the transmission pulse, or
the variation in the transmission time of data packages.
Multi-turn (rotary) encoder See "Absolute (rotary) encoder, multi-turn"
Reset position Function for setting a zero point (or offset) at any position of the
resolution range of an encoder without mechanical adjustment.
Single-turn (rotary) encoder See "Absolute (rotary) encoder, single-turn"
Pulse number A number of light/dark segments are applied to a glass pulse disk. These
segments are scanned by a light beam in the encoder and therefore
determine the possible resolution of a rotary encoder.