Siemens bt300 Operator's Manual page 45

Logic Selection Name
3
CS1: Start
CS2: Reverse
1 Control signal (CS) 1 activates causing the
output frequency to rise. The motor runs
forward.
2 CS2 activates which causes the direction to
start changing (FWD to REV).
3 CS2 is inactivated which causes the direction
to start changing (REV to FWD) because CS1
is still active.
4 Also CS1 inactivates and the frequency drops
to 0.
5 Despite the activation of CS2, the motor does
not start because CS1 is inactive.
6 CS1 activates causing the output frequency to
rise again. The motor runs forward because
CS2 is inactive.
Siemens Industry, Inc.
Building Technologies
Figure 15: I/O A Start/Stop logic = 3.
Table 24: Legend to I/O A Start/Stop logic = 3.
Siemens BT300 HVAC Drive
Chapter 4 - Parameters and Menu Structure
Note
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).
8 Run enable signal is set to TRUE, which
causes the frequency to rise towards the set
frequency 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).
10 The drive starts through pressing the Start
button on the keypad.
11 The drive is stopped again with the stop
button on the keypad.
12 The attempt to start the drive through
pressing the Start button is not successful
because CS1 is inactive.
Parameters (M3)
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DPD01809
2016-06-07