All digital inputs can be programmed to these functions:
[0]
No operation
No reaction to signals transmitted to
terminal.
[1]
Reset
Resets adjustable frequency drive after a
TRIP/ALARM. Not all alarms can be reset.
[2]
Coast inverse
Leaves motor in free mode. Logic ‘0’ =>
coasting stop.
(Default Digital input 27): Coasting stop,
inverted input (NC).
[3]
Coast and
reset inverse
Reset and coasting stop Inverted input (NC).
Leaves motor in free mode and resets the
adjustable frequency drive. Logic ‘0’ =>
coasting stop and reset.
[5]
DC brake
inverse
Inverted input for DC braking (NC).
Stops motor by energizing it with a DC
current for a certain time period. See
2-01 DC Brake Current
to
2-03 DC Brake Cut-
in Speed [RPM]
. The function is only active
when the value in
2-02 DC Braking Time
is
different from 0. Logic ’0’ => DC braking.
[6]
Stop inverse
Stop Inverted function. Generates a stop
function when the selected terminal goes
from logical level ‘1’ to ‘0’. The stop is
performed according to the selected ramp
time (
and
3-52 Ramp 2 Ramp-down Time
.
When the adjustable frequency drive is at
the torque limit and has received a stop
command, it may not stop by itself. To
ensure that the adjustable frequency drive
stops, configure a digital output to Torque
limit & stop [27] and connect this digital
output to a digital input that is configured
as coast.
[7]
External
Interlock
Same function as Coasting stop, inverse,
but External Interlock generates the alarm
message ’external fault’ on the display
when the terminal which is programmed
for Coast Inverse is logic ‘0’. The alarm
message will also be active via digital
outputs and relay outputs, if programmed
for External Interlock. The alarm can be
reset using a digital input or the [RESET]
key if the cause for the External Interlock
has been removed. A delay can be
programmed in
22-00 External Interlock
Delay
. After applying a signal to the input,
the reaction described above will be
delayed with the time set in
22-00 External
Interlock Delay
.
[8]
Start
Select start for a start/stop command. Logic
‘1’ = start, logic ‘0’ = stop.
(Default Digital input 18)
[9]
Latched start
Motor starts, if a pulse is applied for min. 2
ms. Motor stops when Stop inverse is
activated
[10] Reversing
Changes direction of motor shaft rotation.
Select Logic ‘1’ to reverse. The reversing
signal only changes the direction of
rotation. It does not activate the start
function. Select both directions in
4-10 Motor Speed Direction
.
(Default Digital input 19).
[11] Start reversing Used for start/stop and for reversing on the
same wire. Signals on start are not allowed
at the same time.
[14] Jog
Used for activating jog speed. See
3-11 Jog
Speed [Hz]
.
(Default Digital input 29)
[15] Preset
reference on
Used for shifting between external
reference and preset reference. It is
assumed that
External/preset
[1] has been
selected in
. Logic '0'
= external reference active; logic '1' = one
of the eight preset references is active.
[16] Preset ref bit 0 Enables a choice between one of the eight
preset references according to the table
below.
[17] Preset ref bit 1 Enables a choice between one of the eight
preset references according to the table
below.
[18] Preset ref bit 2 Enables a choice between one of the eight
preset references according to the table
below.
Preset ref. bit
2
1
0
Preset ref. 0
0
0
0
Preset ref. 1
0
0
1
Preset ref. 2
0
1
0
Preset ref. 3
0
1
1
Preset ref. 4
1
0
0
Preset ref. 5
1
0
1
Preset ref. 6
1
1
0
Preset ref. 7
1
1
1
[19] Freeze ref
Freezes actual reference. The frozen
reference is now the point of enable/
condition for Speed up and Slow to be
used. If Speed up/down is used, the speed
change always follows ramp 2 (
3-51 Ramp 2
Ramp-up Time
and
3-52 Ramp 2 Ramp-down
Time
) in the range 0 -
3-03 Maximum
Reference
Maximum Reference
.
[20] Freeze output
Freezes actual motor frequency (Hz). The
frozen motor frequency is now the point of
enable/condition for Speed up and Slow to
be used. If Speed up/down is used, the
How to program the adjustab...
VLT AQUA 12-Pulse High Power Instruction Manual
6-18
MG.20.Y1.22 - VLT
®
is a registered Danfoss trademark
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