Danfoss VLT Programming Manual page 80

3 Parameter Description
3
[19] Freeze ref
[20] Freeze output
[21] Speed up
[22] Speed down
[23] Set-up select bit 0
[24] Set-up select bit 1
[32] Pulse input
[34] Ramp bit 0
[36] Mains failure inverse
[37] Fire mode
[52] Run Permissive
[53] Hand start
80
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
Freezes actual reference. The frozen reference 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
Ramp 2 Ramp Up Time
(par. 3-51
Maximum Reference
par. 3-03 . (For closed loop see par. 20-14
Freezes actual motor frequency (Hz). The frozen motor frequency is now the point of enable/con-
dition for Speed up and Speed down to be used. If Speed up/down is used, the speed change always
Ramp 2 Ramp Up Time
follows ramp 2 (par. 3-51
Motor Frequency
range 0 - par. 1-23
NB!
When Freeze output is active, the frequency converter cannot be stopped via a
low 'start [13]' signal. Stop the frequency converter via a terminal programmed
for Coasting inverse [2] or Coast and reset, inverse [3].
For 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 is activated for less than 400
msec. the resulting reference will be increased by 0.1 %. If Speed up is activated for more than 400
msec. the resulting reference will ramp according to Ramp 1 in par. 3-41
Same as Speed up [21].
Selects one of the four set-ups. Set par. 0-10 to Multi Set-up.
Same as Set-up select bit 0 [23].
(Default Digital input 32)
Select Pulse input when using a pulse sequence as either reference or feedback. Scaling is done in
par. group 5-5*.
Select which ramp to use. Logic "0" will select ramp 1 while logic "1" will select ramp 2.
Select to activate function selected in par. 14-10
"0" situation.
A signal applied will put the frequency converter into Fire Mode and all other commands will be
Fire Mode
disregarded. See 24-0* .
The input terminal, for which the Run permissive has been programmed must be logic "1" before a
start command can be accepted. Run permissive has a logic 'AND' function related to the terminal
START
which is programmed for [8],
start running the motor, both conditions must be fulfilled. If Run Permissive is programmed on
multiple terminals, Run permissive needs only be logic '1' on one of the terminals for the function
to be carried out. The digital output signal for Run Request (
[20]) programmed in par. 5-3*, or par. 5-4*, will not be affected by Run Permissive.
NB!
If no Run Permissive signal is applied but either Run, Jog or Freeze commands
is activated, the status line in the display will show either Run Requested, Jog
Requested or Freeze Requested.
A signal applied will put the frequency converter into Hand mode as if button
has been pressed and a normal stop command will be overridden. If disconnecting the signal, the
motor will stop. To make any other start commands valid, another digital input must be assign to
Auto Start
and a signal applied to this. The
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VLT HVAC Drive Programming Guide
2 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Ramp 2 Ramp Down Time
and par. 3-52
Maximum Reference/Feedb.
Ramp 2 Ramp Down Time
and par. 3-52
.
Mains Failure
. Mains failure is active in the Logic
Jog Freeze Output
[14] or [20], which means that in order to
Start [8], Jog
Hand On Auto On
and buttons on the LCP has no impact.
0
0
1
0
1
0
1
0
1
) in the range 0 -
).
) in the
Ramp 1 Ramp Up Time
.
[14] or Freeze output
Hand On
on the LCP