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Example 5:
The output frequency of the frequency converter and
thus the motor speed are to be controlled by means
of digital signals, e.g. from a PLC or using push-but-
tons. Whenever the output frequency is outside the
10-45 Hz range, the relay output must be activated.
The following must be programmed:
Function
Parameter no.
Speed up
401
and down
Speed up
406
and down
Frequency warning
409
on relay
Frequency too low
210
Frequency too high
211
28
®
VLT
NB!:
NB!:
NB!:
Screen for control cables must be connected
as described in the chapter on EMC-correct
installation.
All settings are based on factory settings; however,
motor data settings (parameters 104, 105 and 107)
(or the Quick Set-up menu items 1, 2 and 3) are to be
adjusted to the motor connected.
1 = Speed up
2 = Speed down
3 = Relay is activated when the output frequency is
outside the 10-45 Hz range, i.e. connection 02-01.
Parameter value
Data value no.
FREEZE REF.
[2]
SPEED UP/DOWN
[1]
OUT FREQ RGE
[11]
10 Hz
45 Hz
MG.35.B1.02 – VLT is a registered Danfoss trademark
3500 HVAC
NB!:
NB!:
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