Emerson Commander SX Advanced User's Manual page 94

CONTROL TECHNIQUES
10.30
: Full power braking time
Adjustment range : 0 to 400.0 s
Factory setting : 3.0 s, except for size 2 drives: 4.0 s
This parameter defines for how long the braking resistor can
withstand the maximum braking voltage (780 V or 390 V)
without damage. It is used to determine the time before the
drive trips due to braking overload.
WARNING:
If this parameter is left at 0, the braking resistor will not
be protected.
10.31
: Full power braking period
Adjustment range : 0 to 25.0 min
Factory setting : 1.0 min
This parameter defines the time period which must elapse
between two consecutive braking periods at full power as
defined by parameter 10.30. It is used to configure the
thermal time constant for the resistor used.
Overload
accumulator
10.39
Max.
Ambient
10.30
WARNING:
If this parameter is left at 0, the braking resistor will not
be protected.
10.32
: Not used
10.33
: Drive reset
Adjustment range : 0 or 1
Factory setting : 0
0 (Disabled) (OFF):
1 (Enabled) (On):
A 0 to 1 change in this parameter will cause a drive reset.
If a remote drive reset is required, a terminal must be
assigned to this parameter.
If the drive trips due to IGBT overcurrent, either at the output
bridge or the braking transistor, the drive cannot be reset for
10 seconds (IGBT recovery time).
10.34
: Number of auto-reset attempts
Adjustment range : if 10.91 = 0: 0 to 5
if 10.91 = 1: 0 to 100
Factory setting : 0
0: There will be no automatic reset. A command must be
given.
1 to 5: There will be as many automatic reset attempts as
have been programmed.
When the counter reaches the permitted number of reset
attempts, the drive finally locks. This last trip can only be reset
via a command.
If no trips occur, the counter is decremented by one value
every 5 minutes.
94
ADVANCED USER GUIDE
Commander SX
IP66/Nema 4X variable speed drive
MENU 10: DRIVE STATES AND DIAGNOSTICS
10.31
10.35
: Auto-reset delay
Adjustment range : 0 to 25.0 s
Factory setting : 1.0 s
This parameter defines the time between the drive tripping
and the automatic reset (subject to a minimum stop time for
trips relating to overcurrents).
10.36
: Hold drive healthy during
auto-reset
Adjustment range : 0 or 1
Factory setting : 0
0 (No) (OFF): 10.01 (drive healthy) is reset to zero each
time the drive trips, without taking account of any auto-
resets that could occur.
1 (Yes) (On): Parameter 10.01 is held at 1 during the trip
phases which are reset automatically.
10.37
: Brak. IGBT/Stop on minor trip
Adjustment range : 0 or 1
Factory setting : 0
0 (YES/Fr.WHEEL ) (Free): Freewheel stop on all trip
types.
1 (YES/Ctrled) (Ctld): The drive will control deceleration
before tripping on minor trips it.AC, Oht1, Oht2, th, OLd1,
CL1, CL2, CL3, SCL, EEF, Fbus, tr05, tr10.
10.38
: Serial link user trip
Adjustment range : 0 to 100
Factory setting : 0
This parameter is used to generate user trips, via the serial
link.
Trips generated by the user will be indicated by trxx in the trip
table, xx being the trip code. Only values ≥ 45 and ≤ 51 can
generate a trip.
Customers wishing to reset the drive via the serial link can do
so by giving this parameter the value 100.
10.39
: Braking energy overload accumulator
Adjustment range : 0 to 100.0%
This parameter gives an indication of the braking resistor
temperature modelled according to parameters 10.30 and
10.31. A zero value means that the resistor is close to the
ambient temperature and 100% is the maximum temperature
(trip level).
3854 en - 03.2008 / b