Configuration
Function blocks
Internal motor control with V/f characteristic control (MCTRL1)
8
8.2
8.2.6
8.2-33
EDSVF9333V EN 3.0-06/2005
ƒ The signal at input MCTRL-N-SET is the speed setpoint in [%] and
always refers to the maximum speed (C0011).
ƒ In the most basic configurations, MCTRL-N-SET is connected with the
function block NSET (speed setpoint conditioning).
– It is also possible to connect MCTRL-N-SET with any other analog
output signal of an FB.
ƒ The speed setpoint at MCTRL-N-SET is always limited to ±100 % of the
maximum speed n
max
(C0011).
ƒ The speed setpoint is converted into a frequency setpoint by the motor
control and limited to a maximum output frequency depending on the
chopper frequency f
chop
.
Chopper frequency f
chop
Maximum output frequency
16 kHz 600Hz
8kHz 300Hz
2/4 kHz 150Hz
The motor voltage characteristic is set via the input of the motor ratings.
Via the input MCTRL-BOOST the motor voltage can be raised. The input is
connected to C0016 (freely configurable) in all basic configurations.
ƒ To adapt the motor voltage boost to your application, you can also
connect the input with other function blocks.
Speed setpoint selection
Speed setpoint limitation
Setting of the V/f
characteristic
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