Digital input function
Option
Terminal
Pump 3 interlock
[132]
All
Table 3.12 Functions for Digital Inputs
All
stands for terminals 18, 19, 27, 29, 32, X30/2, X30/3, and
X30/4.
X30/X are the terminals on VLT
®
General Purpose I/O MCB
101.
Functions dedicated to only 1 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 the frequency converter after a trip/
alarm. Not all alarms can be reset.
[2]
Coast inverse Leaves motor in free mode. Logic 0=coast
stop.
(Default digital input 27) Coast stop, inverted
input (NC).
[3]
Coast and
reset inverse
Reset and coast stop inverted input (NC).
Leaves motor in free mode and resets the
frequency converter. Logic 0=coast stop and
reset.
[5]
DC-brake
inverse
Inverted input for DC brake (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 brake.
This selection is not possible when
parameter 1-10 Motor Construction
is set to
[1] PM, non-salient SPM
.
[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 (
parameter 3-42 Ramp 1 Ramp Down
and
).
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 it to a digital input
configured as coast.
[7]
External
Interlock
Same function as coast stop inverse, but
external interlock generates the alarm
message
external fault
when the terminal
programmed for coast inverse is logic 0. The
alarm message is also 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
parameter 22-00 External Interlock Delay
. After
applying a signal to the input, the reaction
is delayed with the time set in
parameter 22-00 External Interlock Delay
.
[8]
Start
Select start value for a start/stop command.
1=start, 0=stop.
(Default digital input 18).
[9]
Latched start
The motor starts if a pulse is applied for
minimum 2 ms. The 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
parameter 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
(Default digital input 29).
[15] Preset
reference on
Used for shifting between external reference
and preset reference. It is assumed that
[1]
External/preset
has been selected in
parameter 3-04 Reference Function
. Logic 0 =
external reference active; logic 1 = 1 of the
8 preset references is active.
[16] Preset ref bit
0
Enables a selection of 1 of the 8 preset
references according to
.
[17] Preset ref bit
1
Enables a selection of 1 of the 8 preset
references according to
.
[18] Preset ref bit
2
Enables a selection of 1 of the 8 preset
references according to
.
Preset ref. bit
2
1
0
Preset reference 0
0
0
0
Preset reference 1
0
0
1
Preset reference 2
0
1
0
Preset reference 3
0
1
1
Preset reference 4
1
0
0
Preset reference 5
1
0
1
Preset reference 6
1
1
0
Preset reference 7
1
1
1
Table 3.13 Preset Reference Bit
Parameter Description
Programming Guide
MG20OB02
Danfoss A/S © 05/2018 All rights reserved.
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Summary of Contents for VLT AQUA Drive FC 202
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