GEA ARIETE, Instructions For Use And Maintenance Manual

Page: 444 / 556

VLT
®
5000 Series
■
Load and motor
100
100 Configuration
(CONFIG. MODE)
Value:
✭
Speed control, open loop
(SPEED OPEN LOOP)
[0]
Speed control, closed loop
(SPEED CLOSED LOOP)
[1]
Process control, closed loop
(PROCESS CLOSED LOOP)
[3]
Torque control, open loop
(TORQUE OPEN LOOP)
[4]
Torque control, speed feedback
(TORQUE CONTROL SPEED)
[5]
Function:
This parameter is used for selecting the configura-
tion to which the VLT frequency converter is to be
adapted. This makes adaptation to a given applica-
tion simple, because the parameters that are not
used in the given configuration are covered up (not
active). By changing between the different applica-
tion configurations, bumpless transfer (frequency
only) is ensured.
Description of choice:
If Speed control, open loop [0] is selected, a normal
speed control (without feedback signal) is obtained,
but with automatic slip compensation, ensuring a
nearly constant speed at varying loads.
Compensations are active, but may be disabled as
required in parameter group 100.
If Speed control, closed loop [1] is selected, a full
holding torque is obtained at 0 rpm, in addition to in-
creased speed accuracy. A feedback signal must be
provided and the PID regulator must be set. (See
also connection examples in the Design Guide).
If Process control, closed loop [3] is selected, the in-
ternal process regulator will be activated, thereby
enabling accurate control of a process with respect
to a given process signal. The process signal can be
set using the actual process unit or as a percentage.
A feedback signal must be supplied from the pro-
cess, and the process setpoint must be adjusted
(See also connection examples in the Design Guide).
If Torque control, open loop [4] is selected, the
speed is regulated and the torque is kept constant.
This is done without a feedback signal, since VLT
5000 accurately calculates the torque on the basis of
the current measurement (See also connection ex-
amples in the Design Guide).
If Torque control, speed feedback [5] is selected, an
encoder speed feedback signal must be connected
to the digital terminals 32/33.
Parameter 205 Maximum reference and parameter
415 Maximum feedback must be adapted to the ap-
plication if [1], [3], [4] or [5] is selected.
101
101 Torque characteristics
(TORQUE CHARACT)
Value:
✭
High-constant torque (H-CONST ANT TORQUE) [1]
High-variable torque low (H-VAR.TORQ.: LOW) [2]
High-variable torque medium
(H-VAR.TORQ.: MEDIUM)
[3]
High-variable torque high
(H-VAR.TORQ.: HIGH)
[4]
High-special motor characteristics
(H-SPEC.MOTOR CHARACT)
[5]
High-variable torque with low starting torque
(H-VT LOW W. CT-START)
[6]
High-variable torque with medium starting torque
(H-VT MED W. CT-START)
[7]
High-variable torque with high starting torque
(H-VT HIGH W. CT-START)
[8]
Normal-constant torque
(N-CONST ANT TORQUE)
[11]
Normal-variable torque low
(N-VAR.TORQ.: LOW)
[12]
Normal-variable torque medium
(N-VAR.TORQ.: MEDIUM)
[13]
Normal-variable torque high
(N-VAR.TORQ.: HIGH)
[14]
Normal-special motor characteristics
(N-SPEC.MOTOR CHARACT)
[15]
Normal-variable torque with low constant
starting torque (N-VT LOW W. CT-START)
[16]
Normal-variable torque with medium constant
starting torque (N-VT MED W. CT-START)
[17]
Normal-variable torque with high constant
starting torque (N-VT HIGH W. CT-START)
[18]
Function:
In this parameter, the principle for adjusting the U/f
characteristics of the VLT frequency converter to the
torque characteristics of the load is selected. By
changing between the different torque characteris-
tics, bumpless transfer (voltage only) is ensured.
Description of choice:
NB!:
For VLT 5001-5006, 200-240 V, and VLT
5001-5011, 380-500 V, it is only possible to
choose torque characteristics from [1] to [8].
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A1.02 - VLT is a registered Danfoss trade mark
110