Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 68

Parameter Description
Functions dedicated to only 1 digital input are stated in
the associated parameter.
All digital inputs can be programmed to these functions:
3 3
[0] No operation
[1] Reset
[2] Coast inverse
[3] Coast and
reset inverse
[5] DC-brake
inverse
[6] Stop inverse
[7] External
Interlock
66
®
VLT
No reaction to signals transmitted to
terminal.
Resets frequency converter after a trip/alarm.
Not all alarms can be reset.
Leaves motor in free mode. Logic 0⇒coasting
stop.
(Default digital input 27): Coasting stop,
inverted input (NC).
Reset and coasting stop, inverted input (NC).
Leaves motor in free mode and resets the
frequency converter. Logic 0⇒coasting stop
and reset.
Inverted input for DC braking (NC).
Stops motor by energizing it with a DC
current for a certain time period. See
parameter 2-01 DC Brake Current to
parameter 2-03 DC Brake Cut In Speed [RPM].
The function is only active when the value in
parameter 2-02 DC Braking Time is different
from 0. Logic 0⇒DC braking.
This selection is not possible when
parameter 1-10 Motor Construction is set to
[1] PM, non salient SPM.
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 in:
•
Parameter 3-42 Ramp 1 Ramp Down
Time.
•
Parameter 3-52 Ramp 2 Ramp Down
Time.
NOTICE
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 [27] Torque limit & stop and
connect this digital output to a digital
input that is configured as coast.
Same function as coasting inverse and stop
inverse, but this option generates the alarm
message External fault on the display when
the terminal programmed for coast inverse
has signal 0. The alarm message is also
active via digital outputs and relay outputs,
if programmed for external interlock. When
the external interlock is removed, the alarm
can be reset using a digital input or the
[Reset] key. A delay can be programmed in
Danfoss A/S © 05/2016 All rights reserved.
Refrigeration Drive FC 103
[8] Start
[9] Latched start
[10] Reversing
[11] Start
reversing
[14] Jog
[15] Preset
reference on
[16] Preset ref bit
0
[17] Preset ref bit
1
[18] Preset ref bit
2
[19] Freeze ref
parameter 22-00 External Interlock Delay. After
applying a signal to the input, the reaction
described above is delayed with the time set
in parameter 22-00 External Interlock Delay.
Select start for a start/stop command. Logic
1=start, logic 0=stop.
(Default: Digital input 18).
The motor starts if a pulse is applied for
minimum 2 ms. The motor stops when stop
inverse is activated.
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
[2] Both directions in parameter 4-10 Motor
Speed Direction.
(Default: Digital input 19).
Used for start/stop and for reversing on the
same wire. Signals on start are not allowed
at the same time.
Used for activating jog speed. See
parameter 3-11 Jog Speed [Hz].
(Default: Digital input 29)
Used for shifting between external reference
and preset reference. It is assumed that
External/preset [1] has been selected in
parameter 3-04 Reference Function. Logic
0=external reference active; logic 1=1 of the
8 preset references is active.
Enables a choice between 1 of the 8 preset
references according to Table 3.9.
Enables a choice between 1 of the 8 preset
references according to Table 3.9.
Enables a choice between 1 of the 8 preset
references according to Table 3.9.
Preset reference 2 1
bit
Preset reference 0 0 0
Preset reference 1 0 0
Preset reference 2 0 1
Preset reference 3 0 1
Preset reference 4 1 0
Preset reference 5 1 0
Preset reference 6 1 1
Preset reference 7 1 1
Table 3.9 Digital Inputs Preset Reference
Bit
Freezes the actual reference. The frozen
reference 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
(parameter 3-51 Ramp 2 Ramp Up Time and
0
0
1
0
1
0
1
0
1
MG16H202