Siemens BT300 Applications Manual page 81

Siemens Application
Flux braking (P3.4.12)
Instead of DC braking, flux braking is a useful way to raise the braking capacity in cases where additional
brake resistors are not needed.
When braking is needed, the frequency is reduced and the flux in the motor is increased, which in turn
increases the motor's capability to brake. Unlike DC braking, the motor speed remains controlled during
braking.
The flux braking can be set ON or OFF.
NOTE
: Flux braking converts the energy into heat at the motor, and should be used intermittently to
avoid motor damage.
Run enable (P3.5.1.10)
Contact open: Start of motor disabled
Contact closed: Start of motor enabled
The variable frequency drive is stopped according to the selected function at P3.2.5. The follower drive
will always coast to stop.
Run interlock 1 (P3.5.1.11)
Run interlock 2 (P3.5.1.12)
The drive cannot be started if any of the interlocks are open.
The function could be used for a damper interlock, preventing the drive to start with damper closed.
Preset frequency selection 0 (P3.5.1.15)
Preset frequency selection 1 (P3.5.1.16)
Preset frequency selection 2 (P3.5.1.17)
Connect a digital input to these functions with the programming method presented in Chapter 3.5.1 to
be able to apply Preset frequencies 1 to 7 (see Table and pages 38, 40 and 78).
AI1 signal filter time (P3.5.2.2)
When this parameter is given a value greater than 0 the function that filters out disturbances from the
incoming analog signal is activated.
24-hour support +1-800-877-7545 (Dial 2)
[Hz]
P3.4.2, P3.4.3
P3.4.1
Figure 20. Acceleration/Deceleration (S-shaped).
P3.4.1
[t]
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