VLT AQUA Low Harmonic Drive Operating In-
structions
[15]
Preset reference on
[16]
Preset ref bit 0
[17]
Preset ref bit 1
[18]
Preset ref bit 2
[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
[52]
Run Permissive
[53]
Hand start
Used for shifting between external reference and preset reference. It is assumed that
preset [1] has been selected in par. 3-04. Logic '0' = external reference active; logic '1' = one of
the eight preset references is active.
Enables a choice between one of the eight preset references according to the table below.
Enables a choice between one of the eight preset references according to the table below.
Enables a choice between one of the eight preset references according to the table below.
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
(par. 3-51 and 3-52) in the range 0 - par. 3-03
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
follows ramp 2 (par. 3-51 and 3-52) in the 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 1in par. 3-41.
Same as Speed up [21].
Selects one of the four set-ups. Set par. 0-10
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.
Mains Failure . Mains failure inverse is active in the Logic "0" situation.
Activates par. 14-10
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 [8], Jog [14] or Freeze Output [20], which means that in order to
which is programmed for
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* Digital outputs, or par. 5-4* Relays, will not be affected by Run
Permissive.
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 Hand On and Auto On buttons on the LCP has no impact.
Off button on the LCP will override Hand Start and Auto Start . Press either the Hand On or Auto
The
On button to make Hand Start and Auto Start active again. If no signal on neither Hand Start nor
Auto Start , the motor will stop regardless of any normal Start command applied. If signal applied
to both
Hand Start and Auto Start , the function will be Auto Start . If pressing the Off button on the
LCP the motor will stop regardless of signals on
®
MG.20.T1.02 - VLT
is a registered Danfoss trademark
6 How to Programme the Low Harmonic Drive
2
1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
Maximum Reference .
Motor Frequency .
Active Set-up to Multi Set-up.
Start [8], Jog [14] or Freeze output
Hand Start and Auto Start .
External/
0
0
1
0
1
0
1
0
1
6
Hand On on the LCP
101
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