Danfoss VLT HVAC Series Programming Manual page 73

VLT ® HVAC Drive Programming Guide
[3] Coast and reset inverse
[5] DC brake inverse
[6] Stop inverse
[7] External Interlock
[8] Start
[9] Latched start
[10] Reversing
[11] Start reversing
[14] Jog
[15] Preset reference on
[16] Preset ref bit 0
[17] Preset ref bit 1
[18] Preset ref bit 2
Reset and coasting stop Inverted input (NC).
Leaves motor in free mode and resets the adjustable frequency drive. Logic '0' => coasting stop
and reset.
Inverted input for DC braking (NC).
Stops motor by energizing it with a DC current for a certain time period. See par.2-01
Current to par.2-03 DC Brake Cut-in Speed [RPM]
par.2-02 DC Braking Time is different from 0. Logic '0' => DC braking.
Stop Inverted function. Generates a stop function when the selected terminal goes from logical level
'1' to '0'. The stop is performed according to the selected ramp time (par.3-42
Time , par.3-52 Ramp 2 Ramp-down Time
NOTE!
When the adjustable frequency drive is at the torque limit and has received a
stop command, it may not stop by itself. To ensure that the adjustable frequency
drive stops, configure a digital output to
this digital output to a digital input that is configured as coast.
Same function as Coasting stop, inverse, but External Interlock generates the alarm message 'ex-
ternal 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
lock Delay , 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
Select start for a start/stop command. Logic '1' = start, logic '0' = stop.
(Default Digital input 18)
Motor starts, if a pulse is applied for min. 2 ms. Motor stops when Stop inverse is activated
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
Motor Speed Direction
par.4-10 .
(Default Digital input 19).
Used for start/stop and for reversing on the same wire. Signals on start are not allowed at the same
time.
Used for activating jog speed. See par.3-11
(Default Digital input 29)
Used for shifting between external reference and preset reference. It is assumed that
preset
[1] has been selected in par.3-04
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
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
3 Parameter Description
. The function is only active when the value in
, par. 3-62, par. 3-72).
Torque limit & stop
External Interlock Delay .
Jog Speed [Hz]
.
Reference Function
. Logic '0' = external reference active;
2 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
DC Brake
3
Ramp 1 Ramp-down
[27] and connect
External Inter-
External/
0
0
1
0
1
0
1
0
1
3-49