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
Logic
Selection Name
Note
4
CS1: Start (edge)
CS2: Reverse
Used to exclude the possibility of an unintentional start. The Start/Stop contact must be
opened before the motor can be restarted.
Figure 16: I/O A Start/Stop logic = 4.
Table 25: Legend to I/O A Start/Stop logic = 4.
1
Control signal (CS) 1 activates causing the
output frequency to rise. The motor runs
forward because CS2 is inactive.
7
Run enable signal is set to FALSE, which drops
the frequency to 0. The run enable signal is
configured with Run Enable (P3.5.1.11).
2
CS2 activates which causes the direction to
start changing (FWD to REV).
8
Before a successful start can take place, CS1
must be opened and closed again.
3
CS2 is inactivated which causes the
direction to start changing (REV to FWD)
because CS1 is still active.
9
Keypad stop button is pressed and the frequency
fed to the motor drops to 0. (This signal only
works if KeypadStopButton [P3.2.3] = Yes).
4
Also CS1 inactivates and the frequency
drops to 0.
10
Before a successful start can take place, CS1
must be opened and closed again.
5
Despite the activation of CS2, the motor
does not start because CS1 is inactive.
11
CS1 inactivates and the frequency drops to 0.
6
CS1 activates causing the output frequency
to rise again. The motor runs forward
because CS2 is inactive.