3.7.3 5-1* Digital Inputs continued
All = Terminals 18, 19, 27, 29, 32, 33, X30/2, X30/3, X30/4.
X30/ are the terminals on MCB 101.
Functions dedicated to only one digital input are stated in
the associated parameter.
All digital inputs can be programmed to these functions:
[0]
No operation
No reaction to signals transmitted to
terminal.
[1]
Reset
Resets frequency converter 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
frequency converter. 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
to
. The function is only active
when the value in
is
different from 0. Logic ’0’ => DC braking.
This selection is not possible when
is set to [1] PM non
salient SPM.
[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 (
,
,
3-62 Ramp 3
Ramp down Time
,
3-72 Ramp 4 Ramp Down
Time
).
NOTE
When the frequency converter is at the
torque limit and has received a stop
command, it may not stop by itself. To
ensure that the frequency converter
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
, External Interlock Time. 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
.
(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
.
(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/
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
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