Control Techniques Commander SE11200025 Guia Del Usuario página 59

increases the losses and therefore reduces the amount of regenerated energy
transferring from the motor to the DC Bus for a given deceleration rate. The drive may
extend the deceleration ramp to prevent the drive tripping on overvoltage (OU) if the load
inertia is too high for the programmed deceleration ramp.
For a given amount of energy, mode 2 allows faster deceleration than mode 1, providing
that the motor can withstand the extra losses.
No. Function
Stopping
31
mode
0 - Coast to stop
When either the Enable, Run Forward or Run Reverse terminals are opened, the drive
output is disabled and the motor coast to stop. The drive cannot be re-enabled for 2
seconds after the Disable/Stop command.
1 - Ramp to stop
The drive ramps down to zero speed under the ramp control selected by parameter 30.
The drive waits for 1 second with the output enabled before disabling.
2 - Ramp to stop with 1 second DC injection braking
The drive ramps down to zero speed under the ramp control selected by parameter 30.
The drive then injects DC for 1 second before the output is disabled.
3 - DC injection braking with detection of zero speed
The drive injects a low speed current and detects when the motor is at low speed. The
drive then injects DC for 1 second.
No. Function
Variable
32
V / f
select
OFF - fixed linear voltage-to-frequency ratio (constant torque - standard load).
On - voltage-to-frequency ratio dependant on load current (dynamic/variable torque - fan
/ pump load).
No. Function
Spinning
33
motor
select
0 - Catch a spinning motor software disabled
1 - Catch a spinning motor software enabled, detect positive and negative frequencies
2 - Catch a spinning motor software enabled, detect positive frequencies only
3 - Catch a spinning motor software enabled, detect negative frequencies only
If the drive is to be configured into fixed boost mode (see parameter 48) with catch
NOTE
a spinning motor software enabled, an autotune (see parameter 38) must be
carried out to measure the motor's stator resistance before a drive is configured
in fixed boost mode. If this is not done, the drive may trip on 0V and OI.AC while
trying to catch a spinning motor.
No. Function
Positive
34
logic
select
OFF - negative logic enabled (source). Connect 0V to a digital input to make active.
On - positive logic enabled (sink). Connect +24V to a digital input to make active.
Commander SE User Guide
Issue Number 9
Type Limitations
RW U
Type Limitations
RW Bit
Type Limitations
RW U
Type Limitations
RW Bit, R
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Range Units
0 - 3
Range Units
On, OFF
Range Units
0 - 3
Range Units
On, OFF
Defaults
1 EUR
1 USA
Defaults
OFF EUR
OFF USA
Defaults
0 EUR
0 USA
Defaults
ON EUR
ON USA
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