NOTE!
When freeze output is active, the adjustable
frequency drive cannot be stopped via a low
‘start [8]’ signal. Stop the adjustable frequency
drive via a terminal programmed for Coast
inverse [2] or Coast and reset inv.
[21] Speed
up
Select Speed up and Slow if digital control of the
up/down speed is desired (motor potentiometer).
Activate this function by selecting either Freeze
reference or Freeze output. When Speed up/down is
activated for less than 400 msec, the resulting
reference will be increased/decreased by 0.1%. If
Speed up/down is activated for more than 400
msec, the resulting reference will follow 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] Slow
Same as Speed up [21].
[23] Set-up
select bit
0
Select Set-up select bit 0 or Select Set-up select
bit 1 to select one of the four set-ups. Set
to Multi Set-up.
[24] Set-up
select bit
1
(Default Digital input 32): Same as Set-up select
bit 0 [23].
[26] Precise
stop inv.
Sends an inverted stop signal when the precise
Precise stop inverse function is available for
terminals 18 or 19.
[27] Precise
start, stop
Use when Precise ramp stop [0] is selected in
.
Precise start, stop is available for terminals 18 and
19.
Precise start makes sure that the angle that the
rotor turns from standing still to reference is the
same for each start (for same ramp time, same
setpoint). This is the equivalent to the precise
stop where the angle that the rotor turns from
reference to standing still is the same for each
stop.
When using for 1-83 [1] or [2]:
The adjustable frequency drive needs a precise
stop signal before the value of Par. 1-84 is
reached. If this is not supplied, the adjustable
frequency drive will not stop when the value in
Par. 1-84 is reached.
Precise start, stop must be triggered by a digital
input and is available for terminals 18 and 19.
[28] Catch up
Increases reference value by percentage (relative)
set in
[29] Slow-
down
Reduces reference value by percentage (relative)
set in
[30] Counter
input
Precise stop function in
acts as counter stop or speed compensated
counter stop with or without reset. The counter
[31] Pulse
edge
triggered
Edge-triggered pulse input counts number of
pulse flanks per sample time. This gives a higher
resolution at high frequencies, but is not as
precise at lower frequencies. Use this pulse
principle for encoders with very low resolution
(e.g., 30 ppr).
[32] Pulse time
based
Time-based pulse input measures the duration
between flanks. This gives a higher resolution at
lower frequencies, but is not as precise at higher
frequencies. This principle has a cut-off frequency
which makes it unsuited for encoders with very
low resolutions (e.g., 30 ppr) at low speeds.
a: very low encoder
resolution
b: standard encoder
resolution
[34] Ramp bit
0
Enables a choice between one of the four ramps
available, according to the table below.
[35] Ramp bit
1
Same as Ramp bit 0.
Preset ramp bit
1
0
Ramp 1
0
0
Ramp 2
0
1
Ramp 3
1
0
Ramp 4
1
1
Parameter Descriptions
FC 300 Programming Guide
3-50
MG.33.MA.22 - VLT
®
is a registered Danfoss trademark
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