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65
VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
Section 1Section 1Section 1Section 1Section 1
Section 2Section 2Section 2Section 2Section 2
Section 3Section 3Section 3Section 3Section 3
Section 4Section 4Section 4Section 4Section 4
Choice of ramp
[4]:
Different ramp times can be selected by means of ter-
minal 29:
24 V DC (from terminal 12) removed from terminal 29
(logic 0) leads to activation of
Ramp 1
(par. 215/216).
24 V DC (from terminal 12) supplied to terminal 29
(logic 1) leads to activation of
Ramp 2
(par. 217/218).
The selected ramp up/down times apply to start/stop
via terminal 18 (19 - if programmed) and also apply if
the reference is changed.
Selection of
Quick-stop
[1] via terminal 27 automa-
tically activates ramp down-time 2 (parameter 218).
Latch start Hand
[5]:
Selected for starting the inverter when the frequency
converter is in hand-operation mode, "Hand". If 24 V
DC is supplied from terminal 12 to terminal 29 for
min. 20 msecs., start is activated.
405 Terminal 29 input (INPUT 29)
Value:
★
Jogging (JOG)
[0]
Freeze jogging reference (JOG FREEZE)
[1]
Freeze reference (FREEZE REF)
[2]
Digital reference (DIGITAL REF)
[3]
Ramp selection (RAMP SELECT)
[4]
Latch start Hand (LATCH ST.HAND)
[5]
Function:
Used to choose between the possible functions of
terminal 29.
Description of choice:
Jogging
[0]:
Selected if the output frequency is to be set at the
value pre-programmed in parameter 203. There is no
need for a separate start command to activate jog-
ging.
Freeze jogging reference
[1]:
Selected if terminals 32/33 (parameter 406) are to be
used for digital control of speed up/down, with the
jogging speed as the point of reference. 24 V DC from
terminal 12 supplied to terminal 29 will freeze the jog-
ging reference; the speed can be changed by means
of terminals 32/33 (parameter 406 = speed up/down).
Freeze reference
[2]:
Selected if terminals 32/33 (parameter 406) are to be
used for digital control of speed up/down (motor po-
tentiometer). 24 V DC (from terminal 12) supplied to
terminal 29, will freeze the existing reference; the
speed can be changed by means of terminals 32/33
(parameter 406 = speed up/down).
Digital reference
[3]:
Selected if there is to be a choice between one of the
digital references (parameters 205-208) or other
references (analogue voltage (parameter 412),
analogue current (parameter 413), pulses (parameter
401), bus references (parameter 516)).
Digital reference [3] is only active if
external on/off
has
been selected in parameter 204. When the digital re-
ference has been activated, the direction of rotation is
determined exclusively by the reference sign.
★
= factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
3.8 Parameter gr
oup 4