Leroy-Somer POWERDRIVE MD, Commissioning Manual, Page: 58 / 146

5 8
COMMISSIONING MANUAL
POWERDRIVE MD
Variable speed drive
MENUS AND DIAGRAMS IN ADVANCED SET UP MODE
LEROY-SOMER
3871 en - 2011.05 / h
5.5.2 - Explanation of parameters in menu 4
: Current ma g nitude
Adjustment range : 0.0 to max. drive current (A)
Reading of the rms current in each drive output phase.
This is the result of the vectorial sum of the reactive current
and the active current.
Note: Max. drive current = 2.22 x
11.32
.
: Active current
Adjustment range : ± max. drive current
Reading of the active current delivered by the drive.
The active current gives a fairly precise image of the motor
torque between 10 Hz and 50 Hz.
A negative value indicates operation in generator mode with
driving load whereas a positive value indicates operation in
motor mode.
: Tor q ue demand
Adjustment range : ± 999.9% Tn (percentage of rated
motor torque)
Value of the torque demand required by the motor as a % of
the rated motor torque.
: Active current demand
Adjustment range : ± motor active current limit
(% motor active In)
The current demand is the result of conversion of the torque
reference
04.08
into active current.
04.04
=
04.03
when the drive current limit is not reached
and the motor is not in the defluxing zone.
: Overridin g motor current limit
Adjustment range : 0 to 300.0% (% motor active In*)
Factory setting
: 150% In
Used to set the maximum starting current limit permitted in
motor mode during a maximum time specified by
04.51
.
When the value of
04.05
is less than
04.07
, then
04.05
overrides
04.07
.
: Generator current limit
Adjustment range : 0 to 300.0% (% motor active In*)
Factory setting
: 110% In
Used to set the maximum permanent current limit permitted
in generator mode.
When the value of
04.07
is less than
04.06
, then
04.07
overrides
04.06
.
: Symmetric current limit
Adjustment range : 0 to 300.0% (% motor active In*)
Factory setting
: 110% In
Used to set the maximum permanent current limit permitted
in motor mode.
Note: In open loop and linear V/F mode, the only current limit
is
04.07
.
* Motor actif current is in relation with the power factor and
motor rated current.
: Tor q ue reference
Adjustment range : ±
04.24
(% motor active In)
Factory setting : 0.0% In
Main torque reference when the drive is configured for
torque control.
Give a positive reference for the torque to be applied
clockwise and conversely, a negative reference for the torque
to be applied counter-clockwise.
The maximum value of
04.08
is fixed by
04.24
.
: Tor q ue offset
Adjustment range : ±150.0%
Factory setting
: 0.0%
: Tor q ue offset selection
Adjustment range : NO (0) or YES (1)
Factory setting
: NO (0)
NO (0): The tor q ue reference is e q ual to parameter
04.08
.
YES (1): The torque reference is equal to parameter
04.08
plus the torque offset value
04.09
.
: Tor q ue mode selector
Adjustment range : SPEED (0), DIRECT Trq (1),
TORQUE (2)
Factory setting : SPEED (0)
:
SPEED (0): Speed control with current limitin g by
parameter
04.07
.
DIRECT Tr q (1): Torque control. The speed reference is no
longer active and the torque reference may be given by
analog reference 2 (if it is programmed on the torque
reference, parameter
04.08
). The output frequency is
adjusted so that the active current measured by the drive
equals the reference.
:
SPEED (0): Speed control with current limitin g by
parameter
04.07
.
DIRECT Tr q (1): Direct torque control. The motor torque is
set to the value of
04.08
(
04.08
+
04.09
if
04.10
is set to
YES).
The motor speed value therefore depends on the resistive
torque of the application.
TORQUE (2): Torque control with overspeed protection
provided by parameter
01.06
.
• In tor q ue control mode (
04.11
= 1), if the resistive
tor q ue becomes zero, the drive accelerates the
machine to the maximum speed of
01.06
+ 30%. It is
therefore imperative to ensure that parameter
01.06
,
which limits the maximum speed, is set so as to ensure
the safety of e
q uipment and personnel.
: Current demand filter ( )
Adjustment range : 0 to 10
Factory setting
: 2
This filter is used to introduce a time constant aimed at
reducing any noise generated by the speed loop, such that:
time constant = 2
04.12
ms.
04.01
04.02
04.03
04.04
04.05
04.06
04.07
04.08
04.09
04.10
04.11
04.12