Danfoss VLT AutomationDrive FC 300 Series, Руководство по программированию, Страница: 74 / 211

NOTE
When Freeze output is active, the frequency
converter cannot be stopped via a low ‘start
[8]’ signal. Stop the frequency converter via a
terminal programmed for Coasting inverse [2]
or Coast and reset, inverse.
[21] Speed
up
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
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
Table 3.13
[22] Speed
down
Same as [21] Speed up .
[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
0-10 Active Set-up to Multi Set-up.
[24] Set-up
select bit
1
(Default Digital input 32): Same as [23] Set-up
select bit 0 .
[26] Precise
stop inv.
Sends an inverted stop signal when the precise
stop function is activated in
1-83 Precise Stop
Function .
Precise stop inverse function is available for
terminals 18 or 19.
[27] Precise
start, stop
Use when Precise ramp stop [0] is selected in
1-83 Precise Stop Function .
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
set-point). 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 Precise Stop Function [1] or
[2]:
The frequency converter needs a Precise Stop
signal before the value of
1-84 Precise Stop
Counter Value is reached. If this is not supplied,
the frequency converter will not stop when the
value in
1-84 Precise Stop Counter Value 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
3-12 Catch up/slow Down Value .
[29] Slow
down
Reduces reference value by percentage (relative)
set in
3-12 Catch up/slow Down Value .
[30] Counter
input
Precise stop function in 1-83 Precise Stop
Function acts as Counter stop or speed
compensated counter stop with or without
reset. The counter value must be set in
1-84 Precise Stop Counter Value .
[31] Pulse
edge
triggered
Counts the 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).
Pulse
Sample time
130BB463.10
Illustration 3.33
[32] Pulse time
based
Measures the duration between pulse 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.
Parameter Descriptions
VLT
®
AutomationDrive Programmming Guide
MG33ME02 - VLT
®
is a registered Danfoss trademark 73
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