Nord Drivesystems SK 200E Series - Keyword Index

POSICON positioning control – Supplementary manual for series SK 200E and SK 250E-FDS
80 BU 0210 en-3117
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9.3 Keyword Index
• Absolute 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 encoder, multiturn
... as for absolute single-turn encoder, however, the number of rotations
are additionally recorded.
• 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
CAN = (Controller Area Network)
Designates a multi-master bus system with two-conductor cable. Its
operation is orientated to events or messages. At present, standard CAN
protocols are specified under CANopen.
• CANopen
Designates a communications protocol based on CAN
• Encoder
Electrical or opto-mechanical device for detecting rotary movements. A
differentiation is made between absolute encoders and incremental
encoders.
• Incremental 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.
• Multiple-turn encoder
See "Absolute encoder, multiturn"
• Precision
Deviation between the actual and the measured position.
• 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.
• Reset position
Function for setting a zero point (or offset) at any position of the
resolution range of an encoder without mechanical adjustment.
• Resolution
(encoder 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.
• Single-turn encoder
See "Absolute encoder, single-turn"
• Total resolution
See Resolution
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