VLT
®
Series 3500
68
★ = ROM default setting. ✔ = Normal Danfoss setup. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
209 Current Limit (I
LIM
) (CURRENT LI)
Value:
0.0 to I
VLT,MAX
★ depending on the unit
✔ 110% of rated current
Function:
Use this parameter to set the maximum intermittent output
current. If the current limit is exceeded, the output fre-
quency is reduced until the current falls to below the current
limit. The output frequency will not increase to the reference
level until the current has fallen below the current limit.
Description of choice:
The value set at the factory corresponds to the rated con-
tinuous output current of the VLT 3500 Series. If the current
limit is to be used as motor protection, the rated motor cur-
rent must be programmed. Parameter 310 determines the
length of time that the drive will run in current limit before an
overcurrent fault. The load range between 100 and 110%
can be programmed, but it is only intended for intermittent
operation with a maximum of 110% for 60 seconds. The in-
termittent operating time will be extended as the load drops
below 110%, and becomes unlimited at 100%.
210 Warning: Low Frequency (LO FREQ. W)
Value:
000.0 to 120.0 Hz ★ 000.0 Hz
Function:
Set the frequency at which the warning is to occur.
Description of choice:
If the output frequency falls below the frequency set (f
LOW
),
the display shows LO FREQ. WARN. Parameters 407
through 410 allow an external warning signal for low fre-
quency.
205 Digital Reference 1 (REF. 1 DIG)
Value:
-100.00% to +100.00% ★ 0 %
of f
MAX.
/analog reference
206 Digital Reference 2 (REF. 2 DIGI)
Value:
-100.00% - +100.00% ★ 0 %
of f
MAX.
/analog reference
207 Digital Reference 3 (REF. 3 DIG)
Value:
-100.00% - +100.00% ★ 0 %
of f
MAX.
/analog reference
208 Digital Reference 4 (REF. 4 DIG)
Value:
-100.00% - +100.00% ★ 0 %
of f
MAX.
/analog reference
Function (parameter 205-208):
Four different, internal, digital references can be pro-
grammed in parameters 205 to 208. The internal digital ref-
erences are stated as a percentage of the value f
MAX
(pa-
rameter 202) or as a percentage of the analog reference. If
a f
MIN
(parameter 201) has been programmed, the internal,
digital reference as a percentage is calculated from the dif-
ference between f
MAX
and f
MIN
, and then added to f
MIN
.
Description of choice (parameters 205-208):
The desired, internal, digital reference is programmed as a
percentage of f
MAX
(parameter 202). Using terminals 32 and
33 as described in parameter 406, it is possible to choose
between the four internal, digital references. See the table
below.
Terminal 33 Terminal 32
0 0 Digital reference 1
0 1 Digital reference 2
1 0 Digital reference 3
1 1 Digital reference 4
NOTE:
The sign determines the direction of rotation.
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