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Appendix
8 Appendix
8.1 Abbreviations and Conventions
Abbreviation
AC
AEO
AWG
AMA
°C
DC
EMC
ETR
f
M,N
FC
HO
IP
I
LIM
8
8
I
INV
I
M,N
I
VLT,MAX
I
VLT,N
LCP
N.A.
NO
P
M,N
PCB
PE
PELV
PM motor
Regen
RPM
T
LIM
U
M,N
Table 8.1 Abbreviations
Conventions
Numbered lists indicate procedures.
Bullet lists indicate other information and description of
illustrations.
Italicised text indicates:
•
Cross-reference
•
Link
•
Footnote
•
Parameter name, parameter group name,
parameter option
48
Operating Instructions
Explanation
Alternating current
Automatic Energy Optimisation
American Wire Gauge
Automatic Motor Adaptation
Degrees Celsius
Direct current
Electromagnetic compatibility
Electronic thermal relay
Nominal motor frequency
Frequency converter
High overload
Ingress protection
Current limit
Rated inverter output current
Nominal motor current
Maximum output current
Rated output current supplied by the
frequency converter
Local Control Panel
Not applicable
Normal overload
Nominal motor power
Printed circuit board
Protective earth
Protective Extra Low Voltage
Permanent magnet motor
Regenerative terminals
Revolutions per minute
Torque limit
Nominal motor voltage
Danfoss A/S © 04/2014 All rights reserved.
8.2 Glossary of Key Terms
Absolute value encoder
This is a special form of encoder, as it indicates not only
the speed and direction of rotation, but also the absolute
physical position. This is communicated via transfer of the
position in parallel form or in the form of a telegram in
serial form. Absolute value encoders also come in 2
versions: Single-turn encoders supply an absolute position
via a specific quantity, or via a freely definable number of
rotations.
AMA
Automatic Motor Adaptation - function in parameter 1-29
Automatic Motor Adaptation (AMA).
ERPM
The speed is defined in relation to the RPM of the encoder.
To underline this, the term encoder revolutions per minute is
selected as the unit.
Motor/encoder gear ratio
Since the encoder is not necessarily mounted on the
motor itself, the relationship between the nominal motor
speed in RPM and the nominal encoder speed in ERPM
must be specified.
Incremental encoder
This is an encoder system that picks up the speed and the
direction of rotation and transmits on the appropriate
configuration. The number of tracks, and thus the number
of signals, indicate the properties of the encoder system.
There are single-track systems that deliver a pulse signal
dependent on the speed as well as a fixed direction signal.
Dual-track systems deliver 2 pulse signals that are offset 90
degrees. By evaluating the 2 tracks, the direction signal is
also obtained. As well as the 2 tracks of the dual-track
encoder, 3-track encoders deliver an additional zero-track,
which emits a signal when the zeros transit is passed
through.
Illustration 8.1 Incremental Encoder Signals
MG33R302
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