Input - Danfoss VLT Decentral Drive FCD 302 Design Manual

Introduction

1.3.2 Input

Control command
Start and stop the connected motor with LCP and digital
inputs.
Functions are divided into 2 groups.
Functions in group 1 have higher priority than functions in
group 2.
Group 1 Reset, coast stop, reset and coast stop, quick stop,
DC brake, stop, the [OFF] key.
Group 2 Start, pulse start, reversing, start reversing, jog,
freeze output.
Table 1.2 Function Groups
1.3.3 Motor
Motor running
Torque generated on output shaft and speed from 0 RPM
to maximum speed on motor.
f
JOG
Motor frequency when the jog function is activated (via
digital terminals).
f
M
Motor frequency.
f
MAX
Maximum motor frequency.
f
MIN
Minimum motor frequency.
f
M,N
Rated motor frequency (nameplate data).
I
M
Motor current (actual).
I
M,N
Rated motor current (nameplate data).
n
M,N
Nominal motor speed (nameplate data).
n
s
Synchronous motor speed.
2 × par . 1 − 23 × 60 s
n =
s par . 1 − 39
n
slip
Motor slip.
P
M,N
Rated motor power (nameplate data in kW or hp).
T
M,N
Rated torque (motor).
U
M
Instant motor voltage.
U
M,N
Rated motor voltage (nameplate data).
MG04H302
Design Guide
Break-away torque
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 Group 1 control commands
- see Table 1.2.
Stop command
A stop command belonging to Group 1 control commands
- see Table 1.2.
1.3.4 References
Analog reference
A signal transmitted to the analog inputs 53 or 54 (voltage
or current).
Binary reference
A signal transmitted to the serial communication 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.
Pulse reference
A pulse frequency signal transmitted to the digital inputs
(terminal 29 or 33).
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 is set in
parameter 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 is set in
parameter 3-02 Minimum Reference.
Danfoss A/S © 05/2018 All rights reserved.
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