References - Single References - Danfoss VLT 5000 Series Instruction Manual

478.801
R =
REC
P
MOTOR
630.137
R
=
REC
P
MOTOR
855.868
R
=
REC
P
MOTOR
P motor in kW.
NOTE
The max. brake resistance selected
should have an ohmic value max. 10%
lower than that recommended by Dan-
foss. If a brake resistor with a higher ohm-
ic value is selected, the 160% braking

References - single references

Using a single reference, only one active reference
signal is connected, either in the form of an external or
in the form of a preset (internal) reference.
The external reference can be voltage, current, fre-
quency (pulse) or binary via the serial port. Two ex-
amples are given below of the way the single
references are handled by VLT 5000 Series.
Example 1:
External reference signal = 1 V (min) - 5 V (max)
Reference = 5 Hz - 50 Hz
Configuration (parameter 100) - Speed control, open
loop.
Setting:
Parameter:
100 Configuration
308 Funct. of analog input
309 Min. reference signal
310 Max. reference signal
203 Reference range
204 Minimum reference
205 Maximum reference
The following can be used:
190
at 500 V
at V
600
at V
690
Setting:
Speed control, open loop
Reference
Min.
Max.
Reference range
Min. reference
Max. reference
- Catch-up/slow-down via digital input terminals 16,17, 29, 32 or 33
- Freeze reference via digital input terminals 16,17, 29, 32 or 33.
®
VLT 5000 Series
torque will not be achieved and there is a
risk that the adjustable frequency drive will
cut out for safety reasons. For further in-
formation, please consult Brake Resistor
Instruction MI.90.FX.YY.
NOTE
If a short circuit in the brake transistor oc-
curs, power dissipation in the brake resis-
tor can only be prevented by using a line
power switch or contactor to disconnect
the power for the adjustable frequency
drive. (The contactor can be controlled by
the adjustable frequency drive).
/ External
Single ref.
\ Preset references (par.215-218)
Data value:
[0]
[1]
1 V
5 V
Min - Max [0]
5 (Hz)
50 (Hz)
MG.51.C5.22 - VLT is a registered Danfoss trademark.
U/f on terminal 53, 54
or 60. f (pulse) on ter-
minal 17 or 29 binary
(serial port).