the shaft is in free mode. Logic ‘0’ ⇒ Quick-
stop.
[5] DC-brake
inverse
Inverted input for DC braking (NC). Stops
motor by energising it with a DC current for a
certain time period. See 2-01 DC Brake Current
to 2-03 DC Brake Cut In Speed [RPM]. The
function is only active when the value in
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
(parameter 3-42 Ramp 1 Ramp Down Time,
3-52 Ramp 2 Ramp down Time, 3-62 Ramp 3
Ramp down Time, 3-72 Ramp 4 Ramp Down
Time).
NOTICE
When the frequency converter is at the
torque limit and has received a stop
command, it does not always stop by
itself. To ensure that the frequency
converter stops, configure a digital
output to [27] Torque limit & stop and
connect this digital output to a digital
input that is configured as coast.
[8] Start (Default digital input 18): Select start for a
start/stop command. Logic ‘1’ = start, logic ‘0’
= stop.
[9] Latched
start
The motor starts if a pulse is applied for min. 2
ms. The motor stops when stop inverse is
activated or a reset command (via DI) is given.
[10] Reversing (Default digital input 19). Change the 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
4-10 Motor Speed Direction. The function is not
active in process closed loop.
[11] Start
reversing
Used for start/stop and for reversing on the
same wire. Signals on start are not allowed at
the same time.
[12] Enable start
forward
Disengages the counterclockwise movement
and allows for the clockwise direction.
[13] Enable start
reverse
Disengages the clockwise movement and
allows for the counterclockwise direction.
[14] Jog (Default digital input 29): Use to activate jog
speed. See parameter 3-11 Jog Speed [Hz].
[15] Preset
reference
on
Shifts between external reference and preset
reference. It is assumed that [1] External/preset
has been selected in 3-04 Reference Function.
Logic '0' = external reference active; logic '1' =
one of the 8 preset references is active.
[16] Preset ref
bit 0
Preset ref. bit 0,1, and 2 enables a choice
between one of the 8 preset references
according to Table 6.6.
[17] Preset ref
bit 1
Same as Preset ref bit 0 [16].
[18] Preset ref
bit 2
Same as Preset ref bit 0 [16].
Preset ref. bit 2 1 0
Preset ref. 0 0 0 0
Preset ref. 1 0 0 1
Preset ref. 2 0 1 0
Preset ref. 3 0 1 1
Preset ref. 4 1 0 0
Preset ref. 5 1 0 1
Preset ref. 6 1 1 0
Preset ref. 7 1 1 1
Table 6.6 Preset Ref. Bit
[19] Freeze
ref
Freezes the actual reference, which is now the
point of enable/condition for speed up and speed
down. If using speed up/down, the speed change
always follows ramp 2 (3-51 Ramp 2 Ramp up Time
and 3-52 Ramp 2 Ramp down Time) in the range 0 -
parameter 3-03 Maximum Reference.
[20] Freeze
output
Freezes the actual motor frequency (Hz), which is
now the point of enable/condition for speed up
and speed down to be used. If using speed up/
down, the speed change always follows ramp 2
(3-51 Ramp 2 Ramp up Time and 3-52 Ramp 2 Ramp
down Time) in the range 0 - parameter 1-23 Motor
Frequency.
NOTICE
When Freeze output is active, the frequency
converter cannot be stopped via a low [8]
start signal. Stop the frequency converter
via a terminal programmed for [2] coasting
inverse or [3] coast and reset, inverse.
[21] Speed
up
If digital control of the up/down speed is desired
(motor potentiometer), select speed up and speed
down. Activate this function by selecting either
freeze reference or freeze output. When speed up/
down is activated for less than 400 ms the
resulting reference is increased/decreased by 0.1 %.
If Speed up/down is activated for more than 400
ms the resulting reference follows the setting in
ramping up/down parameter 3-x1/3-x2.
Shut down Catch up
Unchanged speed 0 0
Reduced by %-value 1 0
Increased by %-value 0 1
Reduced by %-value 1 1
[22] Speed
down
Same as [21] Speed-up.
Programming Operating Instructions
62 Danfoss A/S © Rev. 2014-07-29 All rights reserved. MG37A202
66
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