VLT
®
Series 3500
79
★
= ROM default setting.
✔
= Normal Danfoss setup. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
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:
Use to choose the function of terminal 29.
Description of choice:
Jogging [0]:
Select to allow the drive to start and accelerate to the jog
frequency defined in parameter 203 when terminal 12 (24 V
DC) is connected to terminal 29. There is no need for a
separate start command to activate jogging. The drive will
accelerate to the jog speed using the alternative ramp-up
time set in parameter 217. Jog has no effect during “Local/
Hand” operation and it will not start the drive if the “Stop/
Reset” key has been pressed.
Freeze jogging reference [1]:
Select if terminals 32 and 33 set by parameter 406 are to
be used for digital control of speed up/down with the jog-
ging speed as the point of reference. 24 V DC from terminal
12 supplied to terminal 29 will freeze the jogging reference.
The speed can be changed by means of terminals 32 and
33.
Freeze reference [2]:
Selected if terminals 32 and 33, set by parameter 406, are
to be used for digital control of speed up/down (floating
point control). 24 V DC from terminal 12 to terminal 29 will
freeze the present reference. The speed can be changed
by means of terminals 32 and 33. If used with an analog
speed reference, when 24 v DC from terminal 12 is applied
to terminal 29, the drive will “freeze” the present speed ref-
erence. Changes to the speed reference will have no effect
on the drive’s operation until the voltage is removed from
terminal 29.
Digital reference [3]:
Select if there is to be a choice between one of the digital
references, parameters 205 through 208 and other refer-
ences, analog voltage (parameter 412), analog current (pa-
rameter 413), pulses (parameter 401), or bus references
(parameter 516). Digital reference [3] is only active if
exter-
nal on/off has been selected in parameter 204. When the
digital reference has been activated, the direction of rota-
tion is determined exclusively by the sign of the speed ref-
erence value in parameter 205 through 208.
Choice of ramp [4]:
Different ramp times can be selected through terminal 29:
If no voltage is applied to terminal 29,
Ramp 1 (from param-
eter 215 and 216) is used.
If 24 V DC from terminal 12 is supplied to terminal 29,
Ramp
2 (from parameter 217 and 218) is used. The selected ramp
up/down times apply to start/stop through terminal 18 (or
19, if programmed) and apply if the reference is changed.
Selection of
Quick-stop [1] through terminal 27 automa-
tically activates the alternative ramp down time, parameter
218.
Latch start Hand [5]:
Selected for starting the inverter when the drive is in
manual operation mode, “Hand”. If 24 V DC is supplied
from terminal 12 to terminal 29 for a minimum of 20 msec.,
start is activated.
