vacon • 121 Parameters
6
P3.2.6 I/O A START LOGIC
Values 0...4 offer possibilities to control the starting and stopping of the AC drive with digital
signal connected to digital inputs. CS = Control signal.
The selections including the text 'edge' shall be used to exclude the possibility of an uninten-
tional start when, for example, power is connected, re-connected after a power failure, after a
fault reset, after the drive is stopped by Run Enable (Run Enable = False) or when the control
place is changed to I/O control. The Start/Stop contact must be opened before the motor can
be started.
The used stop mode is
Coasting in all examples.
Table 114. I/O A Start Logic selections.
Selection
number
Selection name Note
0
CS 1: Start Forward
CS 2: Start Backward
The function takes place when the contacts are
closed.
1
CS 1: Start Forward
CS 2: Reverse
The function takes place when the contacts are
closed.
2 Double Start
Run command is set when both Start 1 and Start 2
signals are high. It is reset when both the start sig-
nals are low.
This can be used for a simple tank level control
with hysteresis: if the tank has to be filled, two NC
contact sensors will be placed at minimum and
maximum levels. The drive will start below the
minimum and stop above the maximum.
If the tank has to be emptied, two NO contact sen-
sors have to be used. The drive will start above the
maximum and stop below the minimum.
3 Start sign 1 + Analogue
Run command is set when Start 1 signal is high
and a selectable analogue input is below (or above)
a programmable threshold.
This can be used for a tank level control, where the
analogue measurement is used for both starting
the pump and controlling the speed.
4 Solar only
Run command is always active. Actual running
condition is determined by DC voltage level avail-
able from the solar array.
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