NB!
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.
[7] External Interlock Same function as Coasting stop, inverse, but External Interlock generates the alarm message ’external fault’ on
the display when the terminal which is programmed for Coast Inverse is logic ‘0’. The alarm message will also
be active via digital outputs and relay outputs, if programmed for External Interlock. The alarm can be reset
using a digital input or the [RESET] key if the cause for the External Interlock has been removed. A delay can
be programmed in par. 22-00, External Interlock Time. After applying a signal to the input, the reaction described
above will be delayed with the time set in par. 22-00.
[8] Start Select start for a start/stop command. Logic ‘1’ = start, logic ‘0’ = stop.
(Default Digital input 18)
[9] Latched start Motor starts, if a pulse is applied for min. 2 ms. Motor stops when Stop inverse is activated
[10] Reversing Changes 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 par. 4-10
Motor Speed
Direction
.
(Default Digital input 19).
[11] Start reversing Used for start/stop and for reversing on the same wire. Signals on start are not allowed at the same time.
[14] Jog Used for activating jog speed. See par. 3-11.
(Default Digital input 29)
[15] Preset reference on Used for shifting between external reference and preset reference. It is assumed that
External/preset
[1] has
been selected in par. 3-04. Logic '0' = external reference active; logic '1' = one of the eight preset references
is active.
[16] Preset ref bit 0 Enables a choice between one of the eight preset references according to the table below.
[17] Preset ref bit 1 Enables a choice between one of the eight preset references according to the table below.
[18] Preset ref bit 2 Enables a choice between one of the eight preset references according to the table below.
Preset ref. bit
2 1 0
Preset ref. 0 0 0 0
Preset ref. 1 0 0 1
Preset ref. 2 0 1 0
Preset ref. 3 0 1 1
Preset ref. 4 1 0 0
Preset ref. 5 1 0 1
Preset ref. 6 1 1 0
Preset ref. 7 1 1 1
[19] Freeze ref 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
Maximum Reference
.
[20] Freeze output Freezes actual motor frequency (Hz). The frozen motor frequency 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. 1-23
Motor Frequency
.
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].
[21] Speed up 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.
[22] Speed down Same as Speed up [21].
[23] Set-up select bit 0 Selects one of the four set-ups. Set par. 0-10
Active Set-up
to Multi Set-up.
[24] Set-up select bit 1 Same as Set-up select bit 0 [23].
VLT
®
AQUA Drive
Operating Instructions
8. How to programme the frequency converter
MG.20.M4.02 - VLT
®
is a registered Danfoss trademark
77
8
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