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 par. 2-01
DC Brake
Current
to par. 2-03
DC Brake Cut In Speed [RPM]
. The function is only active when the value in
par. 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 (par. 3-42
Ramp 1 Ramp Down
Time
, par. 3-52
Ramp 2 Ramp Down Time
, par. 3-62
Ramp 3 Ramp down Time
, par. 3-72
Ramp 4
Ramp Down Time
).
NB!
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 ’ex-
ternal 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 par. 22-00
External In-
terlock Delay
, External Interlock Time. After applying a signal to the input, the reaction described
above will be delayed with the time set in par. 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
par. 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 par. 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 par. 3-04
Reference Function
. 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.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
79
3
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