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The digital inputs are used for selecting various functions in the frequency converter. All digital inputs can be set to the following functions:
Digital input function
Select
Terminal
No operation
[0]
All *term 32, 33
Reset
[1]
All
Coast inverse
[2]
All
Coast and reset inverse
[3]
All
DC-brake inverse
[5]
All
Stop inverse
[6]
All
External interlock
[7]
All
Start
[8]
All *term 18
Latched start
[9]
All
Reversing
[10]
All *term 19
Start reversing
[11]
All
Jog
[14]
All *term 29
Preset reference on
[15]
All
Preset ref bit 0
[16]
All
Preset ref bit 1
[17]
All
Preset ref bit 2
[18]
All
Freeze reference
[19]
All
Freeze output
[20]
All
Speed up
[21]
All
Speed down
[22]
All
Set-up select bit 0
[23]
All
Set-up select bit 1
[24]
All
Pulse input
[32]
term 29, 33
Ramp bit 0
[34]
All
Mains failure inverse
[36]
All
Run Permissive
[52]
Hand start
[53]
Auto start
[54]
DigiPot Increase
[55]
All
DigiPot Decrease
[56]
All
DigiPot Clear
[57]
All
Counter A (up)
[60]
29, 33
Counter A (down)
[61]
29, 33
Reset Counter A
[62]
All
Counter B (up)
[63]
29, 33
Counter B (down)
[64]
29, 33
Reset Counter B
[65]
All
Sleep Mode
[66]
Reset Maintenance Word
[78]
Lead Pump Start
[120]
Lead Pump Alternation
[121]
Pump 1 Interlock
[130]
Pump 2 Interlock
[131]
Pump 3 Interlock
[132]
All = Terminals 18, 19, 27, 29, 32, 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
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 to par. 2-03.
The function is only active when the value in par. 2-02 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 and par. 3-52.
VLT AQUA High Power Operation Instructions
5 How to programme the frequency converter
MG.20.P3.02 - VLT
®
is a registered Danfoss trademark
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