Operating Instructions

Chapter 4 - Parameters and Menu Structure
Parameters (M3)
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Siemens Industry, Inc.
Siemens BT300 HVAC Drive
DPD01809
Smart Infrastructure
2019-05-29
Figure 17: Acceleration/Deceleration (S-shaped).
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.
I/O Configuration (M3.5)
The I/O configuration is used to attach features/functions of the drive to the controlling I/O or control source.
There are four I/O configuration areas: Digital Inputs, Digital Outputs, Analog Inputs, and Analog Outputs.
Digital Inputs (M3.5.1)
The digital inputs are very flexible to use. Parameters are functions/features that are connected to the
required digital input terminals. The digital inputs are represented by the slot they exist on. For example,
DigIN Slot A.2 means the second digital input on slot A (basic I/O). It is possible for the function/feature to
be always disabled (or enabled) by using the virtual slot0. For example, to leave a parameter as normally open
all the time, it would be programmed as DigIN Slot0.1. Likewise, to leave a parameter as normally closed all
the time, it would be programmed as DigIN Slot0.2.
It is also possible to connect the digital inputs to time channels which are also represented as terminals. For
example, to run the drive in reverse in accordance with the first time channel, it would be programmed as
TimeChannel.1.
NOTE:
The status of the digital inputs can be monitored in the multimonitor (M2.1) view,
or in the I/O and Hardware (M5) menu.