Danfoss VLT FC51, Design Manual, Page: 8 / 94

1.4 Definitions
1.4.1 Frequency Converter
I
VLT,MAX
The maximum output current.
I
VLT,N
The rated output current supplied by the frequency
converter.
U
VLT, MAX
The maximum output voltage.
1.4.2 Input
Control command
The connected motor can be started and stopped with LCP
and the digital inputs.
Functions are divided into 2 groups.
Functions in group 1 have higher priority than functions in
group 2.
Group 1 Reset, Coasting stop, Reset and Coasting stop,
Quick-stop, DC braking, Stop and the [Off] key.
Group 2 Start, Pulse start, Reversing, Start reversing, Jog
and Freeze output
Table 1.3 Function Groups
1.4.3 Motor
f
JOG
The motor frequency when the jog function is activated
(via digital terminals).
f
M
The motor frequency.
f
MAX
The maximum motor frequency.
f
MIN
The minimum motor frequency.
f
M,N
The rated motor frequency (nameplate data).
I
M
The motor current.
I
M,N
The rated motor current (nameplate data).
n
M,N
The rated motor speed (nameplate data).
P
M,N
The rated motor power (nameplate data).
U
M
The instantaneous motor voltage.
U
M,N
The rated motor voltage (nameplate data).
Break-away torque
175ZA078.10
Pull-out
rpm
Torque
Illustration 1.1 Break-away Torque
η
VLT
The efficiency of the frequency converter is defined as the
ratio between the power output and the power input.
Start-disable command
A stop command belonging to the group 1 control
commands, see
Table 1.3 .
Stop command
See Control commands.
1.4.4 References
Analog Reference
A signal transmitted to the analog inputs 53 or 54, can be
voltage or current.
Bus Reference
A signal transmitted to the serial communication port (FC
port).
Preset Reference
A defined preset reference to be set from -100% to +100%
of the reference range. Selection of 8 preset references via
the digital terminals.
Ref
MAX
Determines the relationship between the reference input
at 100% full scale value (typically 10 V, 20 mA) and the
resulting reference. The maximum reference value set in
3-03 Maximum Reference .
Ref
MIN
Determines the relationship between the reference input
at 0% value (typically 0 V, 0 mA, 4 mA) and the resulting
reference. The minimum reference value set in
3-02 Minimum Reference
Introduction
VLT
®
Micro Drive FC 51 Design Guide
6 MG02K302 - Rev. 2013-12-03
1 1