Toshiba TOSVERT-130G2+ Operation Manual page 85

TOSHIBA
8.7 Operating Functions - Descriptions and Examples (Cont'd)
START-UP FREQUENCY - Sets the frequency at which the inverter will begin operating.
2ND
In the panel control setting mode the frequency display will change as the "up"
"down"
FMAX
up frequency is reached. In the terminal input mode the display will remain at zero until
0
the start-up frequency is reached. This function, along with the voltage boost function,
enables the user to obtain an optimum voltage boost level. See figures below.
Start-Up Frequency
(Start frequency F-St can be set @ 0 to 10Hz)
Maximum
frequency
F-St
0
Frequency setting signal
RUN FREQUENCY - Selects a frequency to initiate inverter run/stop control.
RUN FREQUENCY HYSTERESIS - Used to offset inverter run frequency.
When the frequency reference signal reaches the Frun + Fhys point, the drive will ramp
the motor to that speed. The inverter will continue to follow the reference signal until it
falls below the Frun - Fhys at which time the drive will ramp the motor to a stop. See
figure below.
DC INJECTION START FREQUENCY - Specifies the frequency at which DC injection
2ND
is applied to a motor during a decelerating stop. Used for precise positioning (inching)
of the motor driven equipment.
V/F
DC INJECTION VOLTAGE - Specifies the percent of voltage applied during the
1
DC injection.
DC INJECTION TIME - Specifies the length of time the DC voltage applied.
SEE SECTION 5.10.
SECOND FUNCTIONS
keys are pressed. However, an actual output does not occur until the start-
100%
FH
Frun + Fhys
Frun
Frun - Fhys
0
0%
8 - 26
Start-Up Frequency with Voltage Boost
100%
30%
0 F-St
Output frequency
Stop
Start
Reference Signal
and
Hz
% Frequency
100%