Vacon 100 hvac Applications Manual page 126

VACON · 126
The selections that include the word edge help you to prevent an accidental start.
An accidental start can occur, for example, in these conditions
When you connect the power.
•
When the power is connected again after a power cut.
•
After you reset a fault.
•
After Run Enable stops the drive.
•
When you change the control place to I/O control.
•
Before you can start the motor, you must open the Start/Stop contact.
In all the examples of the next pages, the stop mode is coasting. CS = Control signal.
Selection
number
CS1 = Forward
0
CS2 = Backward
FWD
Set frequency
0 Hz
Set frequency
REV
Run enable
Ctrl signal 1
Ctrl signal 2
Keypad start
button
Keypad stop
button
Fig. 14: I/O A Start/stop logic = 0
1. Control signal (CS) 1 activates and
causes the output frequency to increase.
The motor operates forward.
2. CS2 activates, but it does not have an
effect on the output frequency, because
the direction that is set first has the
highest priority.
9
Selection name
Output
frequency
1 2 3 4 5
Description
The functions activate when the contacts are closed.
6 7 8 9
3. CS1 becomes inactive and causes the
direction to start to change (FWD to
REV), because CS2 is still active.
4. CS2 becomes inactive and the frequency
that is fed to the motor goes to 0.
5. CS2 activates again and causes the
motor to accelerate (REV) to the set
frequency.
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PARAMETER DESCRIPTIONS
t
10 11 12 13