All digital inputs can be programmed to these functions:
[0]
No
operation
No reaction to signals transmitted to the
terminal.
[1]
Reset
Resets frequency converter after a TRIP/ALARM.
Not all alarms can be reset.
[2]
Coast
inverse
(Default Digital input 27): Coasting stop,
inverted input (NC). The frequency converter
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
frequency converter. Logic ‘0’ => coasting stop
and reset.
[4]
Quick stop
inverse
Inverted input (NC). Generates a stop in
accordance with quick-stop ramp time set in
. 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
to
2-03 DC Brake Cut In Speed [RPM]
. The
function is only active when the value in
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
(
,
).
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.
[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. 2
ms. 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
. 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 counterclockwise movement
and allows for the clockwise direction.
[13] Enable start
reverse
Disengages the clockwise movement and
allows for the counterclockwise direction.
[14] Jog
(Default Digital input 29): Use to activate jog
speed. See
[15] Preset
reference on
Shifts 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
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 Speed down
to be used. If Speed up/down is used, the speed
change always follows ramp 2 (
and
) in the range
0 -
.
[20] Freeze
output
Freezes the actual motor frequency (Hz), which is
now the point of enable/condition for Speed up and
Speed down to be used. If Speed up/down is used,
the speed change always follows ramp 2 (
and
)
in the range 0 -
NOTE
When Freeze output is active, the frequency
converter cannot be stopped via a low ‘start
[8]’ signal. Stop the frequency converter via a
terminal programmed for Coasting inverse [2]
or Coast and reset, inverse.
[21] Speed
up
Select Speed up and Speed down if digital control of
the up/down speed is desired (motor potenti-
ometer). Activate this function by selecting either
Freeze reference or Freeze output. When Speed up/
down is activated for less than 400msec. the
Parameter Descriptions
FC 300 Programming Guide
MG.33.MB.02 - VLT
®
is a registered Danfoss trademark
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