Nidec LEROY-SOMER Powerdrive FX, Commissioning Manual

Page: 52 / 176

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ADVANCED PARAMETER-SETTING MODE
Commissioning manual Powerdrive MD2/FX
4617 en - 2017.09 / e
5.3.2 - Explanation of parameters in menu 2
02.01 : Post ramp reference
Adjustment range : • If 01.10 = 0 and 02.02 = 0: 0 to 01.06
• If 01.10 = 0 and 02.02 = 1: 01.07 to
01.06
• If 01.10 = 1: ± 01.06
Format: 32 bits
Measurement of the post-ramp reference. Used for diagnostics.
02.02 : Ramp bypass ( )
Adjustment range : Off (0) or On (1)
Factory setting : Off (0)
Format: 8 bits
Off (0):
Active ramps.
On (1):
Ramps short-circuited.
02.03 : Ramp hold
Adjustment range : No or Yes (1)
Factory setting : No
Format: 8 bits
No:
Ramp freed.
Yes (1):
The ramp is held and acceleration (or deceleration) is therefore
interrupted.
CAUTION:
The ramp hold function is disabled if a stop command is
given.
02.04 : Deceleration ramp mode select
Adjustment range : Fixed ramp (0), Automatic ramp (1),
Automatic ramp + (2),
Fixed ramp + (3)
Factory setting : Automatic ramp (1)
Format: 8 bits
This parameter is not relevant for the POWERDRIVE FX
when 10.77 = No.
Fixed ramp (0):
Deceleration ramp imposed. If the deceleration ramp that has
been configured is too fast in relation to the inertia of the load,
the DC bus voltage exceeds its maximum value (set in 02.08 )
and the drive trips on DC bus overvoltage.
CAUTION:
Select mode 02.04 = Fixed ramp (0) when a braking
resistor is being used.
Automatic ramp (1):
Standard deceleration ramp with automatic extension of the
ramp time in order to avoid causing a drive DC bus overvoltage
trip (threshold set in 02.08 ).
Automatic ramp + (2):
The drive allows the motor voltage to be increased up to 1.2
times the rated voltage set in 05.09 (motor rated voltage), to
avoid reaching the maximum DC bus voltage threshold
(threshold set in 02.08 ). However, if this is not sufficient, the
standard deceleration ramp time is extended, to avoid causing
a drive DC bus overvoltage trip.
For the same amount of energy, mode 2 enables faster
deceleration than mode 1.
Fixed ramp + (3):
Same as mode 2, but the ramp is imposed. If the configured
ramp is too fast, the drive trips on DC bus overvoltage.
CAUTION:
In mode 2 and 3, the motor must be capable of withstanding
additional losses relating to the increase in voltage at its
terminals.
02.05 : Not used
02.06 : S ramp enabled
Adjustment range : No or Yes (1)
Factory setting : No
Format: 8 bits
No:
The ramp is linear.
Yes (1):
A curved part (defined in 02.07 ) at the start and end of the
ramp avoids load swinging.
CAUTION:
The S ramp is disabled during controlled decelerations
( 02.04 = Automatic ramp (1) or Automatic ramp + (2)).
02.07 : S ramp acceleration limit
Adjustment range : 2 to 10
Factory setting : 10
Format: 16 bits
Used to modify the ramp curve by the same value at the start
and end of the ramp.
The value 4 represents a time for the curved part of 25% of the
total ramp and 10 represents a time for the curved part of 10%.
Note:
In S ramp mode, the total ramp time will be greater than that of
the selected ramp.
02.08 : Standard ramp voltage
Adjustment range : 0 to 1300 V
Factory setting : T rating = 710 V, TH rating = 1100 V
Format: 16 bits
This parameter is not relevant for the POWERDRIVE FX
when
10.77
= Off.
It is used when the drive is configured in standard deceleration
mode ( 02.04 = Automatic ramp (1) or Automatic ramp + (2)).
The minimum value of this parameter must be 50 V higher than
the DC bus voltage obtained with the maximum supply voltage
(bus U = mains U x
√
2). If this condition is not adhered to, the
motor performs a freewheel stop. If this threshold is too high
and there are no resistors connected, the drive will trip on DC
bus overvoltage.