Operating Instructions

Table Of Contents
Siemens Application Siemens Industry, Inc. • 75
24-hour support +1-800-877-7545 (Dial 2)
3
Figure 17. I/O A Start/Stop logic = 2.
Explanations:
Selection
number
Selection name Note
2
CS1: Forward (edge)
CS2: Backward (edge)
Used to exclude the possibility of an unintentional start. The
Start/Stop contact must be opened before the motor can be
restarted.
1
Control signal (CS) 1 activates causing the out-
put frequency to rise. The motor runs forward.
7
CS1 activates and the motor accelerates (FWD)
towards the set frequency
2
CS2 activates which, however, has no effect on
the output frequency because the first selected
direction has the highest priority.
8
Run enable signal is set to FALSE, which drops
the frequency to 0. The run enable signal is con-
figured with parameter P3.5.1.10.
3
CS1 is inactivated which causes the direction to
start changing (FWD to REV) because CS2 is
still active.
9
Run enable signal is set to TRUE, which, unlike
if value 0 is selected for this parameter, has no
effect because rising edge is required to start
even if CS1 is active.
4
CS2 inactivates and the frequency fed to the
motor drops to 0.
10
Keypad stop button is pressed and the fre-
quency fed to the motor drops to 0. (This signal
only works if P3.2.3 Keypad stop button = Yes)
5
CS2 activates again causing the motor to accel-
erate (REV) towards the set frequency.
11
CS1 is opened and closed again which causes
the motor to start.
6
CS2 inactivates and the frequency fed to the
motor drops to 0.
12
CS1 inactivates and the frequency fed to the
motor drops to 0.
t
Ou t p u t
frequency
FWD
REV
Ctrl signal 2
Ctrl signal 1
Run enable
Set frequency
Set frequency
0 Hz
Keypad stop
button
1 2 3 4 5 6 7 8 9
11093.emf
11 1210