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59
COMMISSIONING MANUAL
POWERDRIVE MD
Variable speed drive
MENUS AND DIAGRAMS IN ADVANCED SET UP MODE
LEROY-SOMER
3871 en - 2011.05 / h
: Current loop proportional
g
ain
: Current loop inte
g
ral
g
ain
Adjustment range : 0 to 250
Factory setting
:
04.13
= 40
04.14
= 40
Due to a number of factors internal to the drive, oscillations
may occur in the following cases:
- Frequency control with current limiting around the rated
frequency and on load impacts
- Torque control on machines with a low load and around the
rated speed
- On a mains supply break or on a controlled deceleration
ramp when control via the DC bus is requested.
To reduce these oscillations, we recommend that you first:
- Increase the proportional gain
04.13
- Then reduce the integral gain
04.14
and
: Not used
: Reactive current
Adjustment range : 0 to + max. drive current (A)
Reactive current reading.
: Overridin
g
current limit
Adjustment range : 0 to + 300% (% max. active In)
Indication of the transient limit of the drive current. This value
depends on
04.05
,
04.06
,
04.51
and internal limits.
: Overload accumulator
Adjustment range : 0 to 100%
This parameter indicates the estimated thermal state of the
motor (I
2
t) (see
10.17
); however, it does not generate a trip
in the event of motor overheating. This parameter is reset to
0 on each power-up.
The use of a PTC sensor is therefore strongly recommended
to protect the motor.
: Percenta
g
e load
Adjustment range : ± active current limit (% active In)
This parameter indicates the drive load level. A positive value
indicates operation in motor mode whereas a negative value
indicates operation in generator mode (driving load).
The maximum value of
04.20
is fixed by
04.24
.
to
: Not used
: User max. current scalin
g
Adjustment range : ± 999.9%
Factory setting
: 150%
Defines the maximum value of parameter
04.20
and
parameter
04.08
.
to
: Not used
: Time start tor
q
ue topermanent tor
q
ue
Adjustment range : 0 to 250 s
Factory setting
: 60 s
On starting, time permitted for torque limit
04.05
before
changing to torque limit
04.07
.
04.13
04.14
04.15
04.16
04.17
04.18
04.19
04.20
04.21
04.23
04.24
04.25
04.50
04.51