Danfoss VLT HVAC Drive FC 100 Series Programming Manual Download Page 48

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3.6 Main Menu - Digital In/Out - Group 5

3.6.1 5-0* Digital I/O Mode

Parameters for configuring the input and output using
NPN and PNP.

These parameters cannot be adjusted while the motor is
running.

5-00 Digital Input Mode

Option: Function:

Set NPN or PNP mode for digital inputs 18, 19 and 27.
Digital Input Mode

[0] PNP Action on positive directional pulses (0). PNP systems

are pulled down to GND.

[1] NPN Action on negative directional pulses (1). NPN systems

are pulled up to +24 V, internally in the adjustable
frequency drive.

5-03 Digital Input 29 Mode

Option:

Function:

[0]

PNP

[1]

NPN

3.6.2 5-1* Digital Inputs

Parameters for configuring the input functions for the
input terminals.
The digital inputs are used for selecting various functions
in the adjustable frequency drive. All digital inputs can be
set to the following functions:

Digital input
function

Description

[0] No operation

No reaction to signals transmitted to
terminal.

[1] Reset

Resets Adjustable frequency drive 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 Adjustable frequency drive.
Logic ‘0’

⇒

coasting stop and reset.

Digital input
function

Description

[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

the motor stops, the shaft is in free mode.

[5] DC brake inverse Inverted input for DC braking (NC). Stops

motor by energizing it with DC current for
a certain time period, see

2-01 DC Brake

Current

. Function is only active when

value in

2-02 DC Braking Time

is different

from 0. This selection is not possible
when

1-10 Motor Construction

is set to [1]

PM non-salient SPM.

[6] Stop inverse

Stop inverted function. Generates stop
function when selected terminal goes
from logical level “1” to “0” (not latched).
The stop is performed according to the
selected ramp time.

[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.

*[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

Change the direction of the motor shaft
rotation. Reversing signal only changes
the direction of rotation; it does not
activate the start function. Select

[2] Both

directions

4-10 Motor Speed Direction

. 0

= normal, 1 = reversing.

[11] Start reversing

Use for start/stop and for reversing at the
same time. Signals on

[8] start

are not

allowed at the same time. 0 = stop, 1 =
start reversing.

[14] Jog

Used for activating jog speed. See