VLT
®
Series 3500
80
★
= ROM default setting.
✔
= Normal Danfoss setup. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
406 Terminals 32/33 Input (INPUT 32/3)
Value:
Choice of digital reference (SPEED SELECT) [0]
✔
Speed up/down (SPEED UP/DOWN)
[1]
Choice of setup (SETUP SELECT)
[2]
★
4 setups, extended (4 SETUP EXT.)
[3]
Function:
Used to choose the functions of terminals 32 and 33.
Description of choice:
Selection of digital reference [0]:
Select if up to four different, pre-programmed, digital speed
references (preset speeds) are to be chosen following the
table below:
Digital reference
Terminal 33
Terminal 32
1 (parameter 205)
0
0
2 (parameter 206)
0
1
3 (parameter 207)
1
0
4 (parameter 208)
1
1
Speed up/down [1]:
Select if digital control of the speed up/down is desired for
floating point control. This function is active only if the
freeze reference/freeze jogging reference has been se-
lected in parameter 400, 401 or 405, and if the correspond-
ing terminal 16, 17 or 29 is supplied with 24 V DC from ter-
minal 12. As long as terminal 32 receives 24 V DC from
terminal 12, the output frequency will increase towards f
MAX
(set by parameter 202).
As long as terminal 33 receives 24 V DC from terminal 12,
the output frequency will decrease towards f
MIN
(set by pa-
rameter 201).
Terminal 33
Terminal 32
No reference change
0
0
Increase reference
0
1
Reduce reference
1
0
Reduce reference
1
1
A pulse of 24 V DC from terminal 12 is supplied to terminal
32 or 33 (logical “1”) with a duration of between 20 msec.
and 500 msec. will lead to a change of speed of 0.1 Hz.
Logical “1” for more than 500 msec. will make the output
frequency change at a rate determined by the ramps set in
parameters 215 and 216.
The digital speed reference can be adjusted even if the unit
has stopped (does not apply to motor coasting stop, quick-
stop or DC-braking on terminal 27). The speed reference
will be retained after an AC power outage if the speed refer-
ence was constant for at least 15 seconds. See parameter
014.
Choice of setup [2]:
If
multi-setup has been selected in parameter 001, external
switches can be used to select the active setup as shown in
the table below. “1” represents 24 V from terminal 12.
Setup
Terminal 33
Terminal 32
1
0
0
2
0
1
3
1
0
4
1
1
Four setups, extended [3]: This allows terminals 32 and 33
to be used to choose the desired parameter set or to
change the speed of the drive as in speed up/down above.
If freeze reference is not selected in parameter 400, 401 or
405, the terminals function as shown below. “1” represents
24 V from terminal 12.
Setup
Terminal 32
Terminal 33
1
0
0
2
0
1
3
1
0
4
1
1
If, however, freeze reference is chosen in either parameter
400, 401 or 405, it will be possible to choose between two
functions by means of terminal 16, 17 or 29. When no volt-
age is applied to terminal 16, 17 or 29, terminals function as
shown below. “1” represents 24 V from terminal 12.
Setup
Terminal 32
Terminal 33
1
0
0
2
0
1
3
1
0
4
1
1
When 24 V DC is applied to terminal 16, 17 or 29, the ter-
minals function as shown below. “1” represents 24 V from
terminal 12.
Terminal 33
Terminal 32
Freeze reference (summarized)
0
0
Increase reference
0
1
Reduce reference
1
0
Reduce reference
1
1
