Siemens BT300 Applications Manual page 78

Siemens Industry, Inc. • 76
Selection
Selection name
number
CS1: Start
3
CS2: Reverse
FWD Output
frequency
Set frequency
0 Hz
Set frequency
REV
Run enable
Ctrl signal 1
Ctrl signal 2
Keypad start
button
Keypad stop
button
1
Explanations:
Control signal (CS) 1 activates causing the out-
1
put frequency to rise. The motor runs forward.
CS2 activates which causes the direction to start
2
changing (FWD to REV).
CS2 is inactivated which causes the direction to
3 start changing (REV to FWD) because CS1 is
still active.
Also CS1 inactivates and the frequency drops to
4
0.
Despite the activation of CS2, the motor does
5
not start because CS1 is inactive.
CS1 activates causing the output frequency to
6 rise again. The motor runs forward because CS2
is inactive.
2 3 4 6
5
Figure 18. I/O A Start/Stop logic = 3.
Note
7 8 9
10
Run enable signal is set to FALSE, which drops
7 the frequency to 0. The run enable signal is con-
figured with parameter P3.5.1.10.
Run enable signal is set to TRUE, which causes
8 the frequency to rise towards the set frequency
because CS1 is still active.
Keypad stop button is pressed and the fre-
9 quency fed to the motor drops to 0. (This signal
only works if P3.2.3 Keypad stop button = Yes)
The drive starts through pushing the Start button
10
on the keypad.
The drive is stopped again with the stop button
11
on the keypad.
The attempt to start the drive through pushing
12 the Start button is not successful because CS1
is inactive.
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