- 75 -
Separation is generally used in induction heating, inverter power supply and torque motor
control and other occasions.
When selecting VF separation control, the output voltage can be set via function code P3 -
14, or from analog, multi-step instructions, PLC, PID or communication reference. When
the non-digital setting is used, each set of 100% corresponds to the rated voltage of the
motor. When the percentage of analog output is negative, the set absolute value is used as
the effective setting value.
0
：
number setting
（
P3-14
）
The voltage is set directly from P3-14
1
：
AI1 2
：
AI2 3
：
AI3
The voltage is determined by the analog input terminal.
4
、
High speed pulse setting
（
S5
）
The voltage reference is given by the terminal pulse.
Pulse given signal specifications: voltage range 9V ~ 30V, the frequency range
0 kHz ~ 100 kHz.
5
、
Multi - step instructions
When the voltage source is a multi-segment instruction, set the P4 group and
PC group parameters to determine the correspondence between the given signal
and the given voltage.
6
、
Simple PLC
When the voltage source is a simple PLC, you need to set the PC group
parameters to determine the given output voltage
7
、
PID
Output voltage according to PID closed loop. For details, refer to the PA group
PID introduction.
8
、
Communication given
The voltage is given by the host computer by means of communication.
The VF separation voltage source selection is similar to the frequency source
selection mode, see the description of the P0-03 main frequency source selection.
Among them, all kinds of selection corresponding to the set of 100.0%, refers to
the voltage rated voltage (take the corresponding set value should be absolute
value)
P3-15
VF voltage acceleration
time
Factory default
0.0s
Set range
0.0s
～
1000.0s
VF separation rise time refers to the output voltage from 0V to the motor rated voltage
required time. As shown in Figure 6-7:
