Toshiba VF-SX - Manual (Page 50)

TOSHIBA 8-5
8.2.1 Drive Mode
The Drive Mode is automatically selected every time power is initiated to the
drive. In this mode the inverter output frequency monitoring and the frequency
setting coraniand value is taken from non-volatile memory and implemented. A
status warning (indicating a possible trip] is displayed during operation, if
this condition is warranted. Trip information for any type of trip is displayed
whenever the inverter is tripped OFF. The LED monitor display will show these
trip codes.
If no warning or trip has occurred the LED display shows the frequency value.
This is the frequency which the drive sends to the motor. When the drive is
first energized the display will read
0.0.
The "HZ" LED beneath the LED
display will be lit, indicating the display is showing a value of frequency.
A status warning indicator is a one of three flashing characters to the left of
the frequency in the LED display. These characters indicate an overcurrent
condition, an overvoltage condition, or an overload condition. Under most
circumstances, if these conditions are not cleared the drive will eventually
trip.
If the drive does trip, the trip code indicating the cause of that particular
trip will be displayed on the LED monitor display. See Chart 1 below for a
summary of all trip codes. See Chapter 16 for a brief discussion about potential
solutions to drive trips.
1. Setting or Changing an Output Frequency
To implement a frequency change press the or keys while the drive is
in the Drive Mode. If the frequency command value is changed during operation,
the operating frequency will also change accordingly. If the frequency command
value is different from the operating frequency then acceleration or deceleration
will occur, based on the accel/decel time parameters currently programmed in the
drive. It is possible to prevent a frequency change from the touchpad, by
changing the parameter Frequency Setting Mode Selection
[ F H O d ] .
See
Chapter 10.
2. Status Warning
A warning character and a frequency value are sometimes displayed alternately on
the LED display when running in the drive mode. The following three warning
characters can be displayed:
[C]..... When a current more than the overcurrent stall level is detected.
[ P ]
. When a voltage more than the overvoltage stall level is detected.
[L]..... When the overload trip parameter ( tHr ) calculates that output
current has exceeded more than approximately 75X of the trip value.