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

No operation

Reset

Coast inverse

Coast and reset inverse

DC brake inverse

Stop inverse

External interlock

Start

Latched start

Reversing

Start reversing

Jog

Preset reference on

Preset ref bit 0

Preset ref bit 1

Preset ref bit 2

Freeze reference

Freeze output

Speed up

Slow

Set-up select bit 0

Set-up select bit 1

Pulse input

Ramp bit 0

Line failure inverse

Fire mode

Run Permissive

Hand start

Auto-start

DigiPot Increase

DigiPot Decrease

DigiPot Clear

Counter A (up)

Counter A (down)

Reset Counter A

Counter B (up)

Counter B (down)

Reset Counter B

Sleep Mode

Reset Maintenance Word

Lead Pump Start

Lead Pump Alternation

Pump 1 Interlock

Pump 2 Interlock

Pump 3 Interlock

3.7.4 Digital Inputs, 5-1* continued

All = Terminals 18, 19, 27, 29, 32, 33, X30/2, X30/3, X30/4. X30/ are the terminals on MCB 101.

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

[1]

Reset

[2]

Coast inverse

3-48

Select

[0]

[1]

[2]

[3]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

[14]

[15]

[16]

[17]

[18]

[19]

[20]

[21]

[22]

[23]

[24]

[32]

[34]

[36]

[37]

[52]

[53]

[54]

[55]

[56]

[57]

[60]

[61]

[62]

[63]

[64]

[65]

[66]

[78]

[120]

[121]

[130]

[131]

[132]

No reaction to signals transmitted to terminal.

Resets adjustable frequency drive 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).

MG.11.C6.22 - VLT

is a registered Danfoss trademark

VLT

HVAC Drive Programming Guide

Terminal

All *terminal 19, 32, 33

All

All *terminal 18

All

All *terminal 29

All

terminal 29, 33

All

29, 33

All

29, 33

All

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Danfoss VLT HVAC Series Programming Manual page 72

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