AC70 VC CONTROL FREQUENCY INVERTER MANUAL
FUNCTION PARAMETER DETAILED SPECIFICATION
103
F-49
VS2 terminal input
bipolar control zero
hysteresis band
Range: 0.00V-3.00V
Default: 0.20V
VS2 terminal input voltage lower limit
This function defines the minimum signal which received by the analog
input terminal (VS2). Frequency inverter will automatically filters the voltage signal whose value is lower than this
value.
VS2 terminal input voltage upper limit
This function defines the maximum signal which received by the
analog input terminal (VS2). Frequency inverter will automatically filter the voltage signal whose value is higher than
this value.
VS2 terminal input voltage gain S2
This function is used to amplify or reduce the (VS2) terminal analog value.
VS2 terminal input zero offset
This function is used to adjust the (VS2) terminal zero point in the bipolar
control mode; Its adjustment direction is opposite to the actual zero point. If the actual input voltage is +0.5V, at this
moment, users should set the zero offset as-0.5V to let the voltage corresponding to the zero voltage (only valid
when
[F-48]
is set as 1 or 2)
VS2 terminal input bipolar adjust and direction control
0: Bipolar adjust and direction control both invalid: the output frequency is determined by the input voltage of
terminal (VS2).
1: Bipolar adjust and direction control both valid: the output frequency of frequency inverter is determined by the
absolute value of amplitude of the input voltage of terminal (VS2). While output phase sequence (machine
direction)is determined by the polar of the input voltage terminal(VS2), frequency inverter neglects its direction
turning setting orders only except this order. When the voltage (VS2)> 0,frequency inverter outputs positive phase
sequence, machine forward rotates. When voltage (VS2) < 0,frequency inverter outputs negative phase sequence,
machine reverses.
When the parameter
[E-46]
is set as 2 prohibit reverse, if (VS2) <0, machine reverse, frequency inverter will
operates as 0 frequency.
The Bipolar analog input signal(-10V
～
0V
～
+10V)is stipulated as following: 0V
～
+10V step is corresponding to
from [F-56] input frequency lower limit setting to
[F-57]
input frequency upper limit setting, forward running; 0V
～
-10V step is corresponding to from
[F-56]
input frequency lower limit setting to
[F-57]
input frequency upper limit
setting, reverse running.
Tips: In two channels combination, bipolar signal will carry out signed calculation based on the combination mode
selection. Negative voltage and frequency DW signal are negative signal. All other input signals of VS2 are positive
signal. If calculation result is positive, the machine forward rotates. If the calculation result is negative, machine
runs in reverse direction.
2. Bipolar adjust valid, direction control invalid: In two channels combination, it used to add or reduce frequency of
another channel. It carries out signed calculation while combination. If the result is positive, machine runs according
to
[E-01]
given direction. If the result is negative, the output frequency is ‘0’. Bipolar signal takes part in frequency
calculation, do not change or decide the direction of the machine.
VS2 terminal input bipolar control zero hysteresis band This function is used in the bipolar control mode to
adjust the (VS2) terminal zero point corresponding voltage range. If the zero point range is set as -1V
～
+1V, the
hysteresis band should be set as 1V. (only valid when it is set as ‘1 ’ of
[F-48]
parameter )
