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 the
terminal.
[1]
Reset
Resets Adjustable frequency drive after a
TRIP/ALARM. Not all alarms can be reset.
[2]
Coast
inverse
(Default Digital input 27): Coasting stop,
inverted input (NC). The Adjustable frequency
drive leaves the motor in free mode. Logic ‘0’
=> coasting stop.
[3]
Coast and
reset inverse
Reset and coasting stop Inverted input (NC).
Leaves motor in free mode and resets
Adjustable frequency drive. Logic ‘0’ =>
coasting stop and reset.
[4]
Quick stop
inverse
Inverted input (NC). Generates a stop in
accordance with the quick-stop ramp time set
in
3-81 Quick Stop Ramp Time
. When motor
stops, the shaft is in free mode. Logic ‘0’ =>
quick stop.
[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 (
3-42 Ramp 1 Ramp Down Time
,
3-52 Ramp 2 Ramp down Time
,
3-62 Ramp 3
Ramp down Time
,
3-72 Ramp 4 Ramp Down
Time
).
NOTE!
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.
[8]
Start
(Default Digital input 18): Select start for a
start/stop command. Logic ‘1’ = start, logic ‘0’
= stop.
[9]
Latched
start
The motor starts, if a pulse is applied for min.
2ms. The motor stops when Stop inverse is
activated or a reset command (via DI) is
given.
[10] Reversing
(Default Digital input 19). Change the
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
. The
function is not active in process closed-loop.
[11] Start
reversing
Used for start/stop and for reversing on the
same wire. Signals on start are not allowed at
the same time.
[12] Enable start
forward
Disengages the counter-clockwise movement
and allows for the clockwise direction.
[13] Enable start
reverse
Disengages the clockwise movement and
allows for the counter-clockwise direction.
[14] Jog
(Default Digital input 29): Use to activate jog
speed. See
3-11 Jog Speed [Hz]
.
[15] Preset
reference on
Shifts between external reference and preset
reference. It is assumed that
External/preset
[1]
has been selected in
3-04 Reference Function
.
Logic '0' = external reference active; logic '1'
= one of the eight preset references is active.
[16] Preset ref
bit 0
Preset ref. bit 0,1, and 2 enables a choice
between one of the eight preset references
according to the table below.
[17] Preset ref
bit 1
Same as Preset ref bit 0 [16].
[18] Preset ref
bit 2
Same as Preset ref bit 0 [16].
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 the actual reference, which 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
.
[20] Freeze
output
Freezes the actual motor frequency (Hz), which 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 -
1-23 Motor
Frequency
.
Parameter Descriptions
FC 300 Programming Guide
3-50
MG33MD22 - VLT
®
is a registered Danfoss trademark
3
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