Danfoss VLT AutomationDrive FC 301 Programming Manual page 78

Parameter Descriptions
[5] DC-brake
inverse
3 3
[6] Stop inverse Stop Inverted function. Generates a stop
[8] Start
[9] Latched
start
[10] Reversing
[11] Start
reversing
[12] Enable start
forward
[13] Enable start
reverse
[14] Jog
[15] Preset
reference on
76
®
VLT
3-81 Quick Stop Ramp Time. When motor
stops, the shaft is in free mode. Logic '0' ⇒
Quick-stop.
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.
function when the selected terminal goes
from logical level '1' to '0'. The stop is
performed according to the selected ramp
time (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 may not stop by itself. To
ensure that the frequency converter
stops, configure a digital output to
Torque limit & stop [27] and connect
this digital output to a digital input
that is configured as coast.
(Default Digital input 18): Select start for a
start/stop command. Logic '1' = start, logic '0'
= stop.
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.
(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.
Used for start/stop and for reversing on the
same wire. Signals on start are not allowed at
the same time.
Disengages the counterclockwise movement
and allows for the clockwise direction.
Disengages the clockwise movement and
allows for the counterclockwise direction.
(Default Digital input 29): Use to activate jog
speed. See 3-11 Jog Speed [Hz].
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.
AutomationDrive FC 301/302 Programming Guide
[16] Preset ref
bit 0
[17] Preset ref
bit 1
[18] Preset ref
bit 2
Preset ref. bit
Preset ref. 0
Preset ref. 1
Preset ref. 2
Preset ref. 3
Preset ref. 4
Preset ref. 5
Preset ref. 6
Preset ref. 7
Table 3.13 Preset Ref. Bit
[19] Freeze
ref
[20] Freeze
output
[21] Speed
up
Unchanged speed
Reduced by %-value
Increased by %-value
Reduced by %-value
Table 3.14 Shut Down/Catch Up
MG33MH02 - Rev. 2013-09-30
Preset ref. bit 0,1, and 2 enables a choice
between one of the 8 preset references
according to Table 3.16.
Same as Preset ref bit 0 [16].
Same as Preset ref bit 0 [16].
2 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Freezes the actual reference, which is now the
point of enable/condition for Speed up and Speed
down to be used. If Speed up/down is used, 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 - 3-03 Maximum Reference.
Freezes the actual motor frequency (Hz), which is
now the point of enable/condition for Speed up
and Speed down to be used. If Speed up/down is
used, 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 - 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.
Select Speed up and Speed down if digital control
of the up/down speed is desired (motor potenti-
ometer). Activate this function by selecting either
[19] Freeze ref or [20] 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
0
1
0
1
0
0
1
0
1
0
1
0
1
Catch up
0
0
1
1