Toshiba VT130G1 - Manual (Page 22)

Section
TABLE 3-1. Description of Variable Resistor (RH)
RH Mo. Symbol Adjustment Function
When the RH la
Túrnad Clockwiae
Adjuatment
At Shipment Remarks
1RH FM
Remote frequency meter
calibration
.Sweep of the frequency
meter increases
2RH FRO
Output frequency
adjustment
Output frequency
decreases
60 Hz
3RH V-BS
Output voltage b(Voltage boost) Minimum output
voltage increases
4RH V-GN Output voltage gam V/F ratio decreases 100%
SRH I-B8 Current irtput bias Output V and F increase 0% 4 mA input
6RH l-GN Current input gam Output gain decreases 100% 20 mA input
7RH ACC
Acceleration time
adjustment Acceleration time
decreases
about 20 sec 1 about 120 s
8RH DEC
Deceleration lime
adjustment Deceleration time
decreases
about 20 sec 1 — about 120 s
9RH UL REF input upper limit Limit value increases 60 Hz
10RH LL REF input lower Nmit Limit value increases 0 Hz
J5
Jumper Deceleration time control
When connected, increases
decel time to avoid O P inp connected
Cut jumper when
using dynamic bra-
Note: Do not touch variable resistors which are not described above.
Adjustment Procedures
The ESP-G1 Built-up Assembly is adjusted for standard 3 to 60 Hz operation. Before
readjusting, determine if factory adjustment is not satisfactory, if the speed range is not
correct for the motor or machine, reca ibration is necessary. If inverter stalling or shut­
down occurs during normal machine operation, adjustment is necessary. Table 32, page
shows a list of adjustments and ranges.
WARNING!
Adjusting the Inverter with power on requires special precautions:
Ail test equipment should be connected and disconnected with
POWER OFF.
High voltage exists on the base driver board, all potentiometers
should be adjusted with insulated handie screwdrivers.
Grounded test equipment, such as oscilloscopes, may damage the
inverter.
Isolate all instruments from ground before using. The O.C. bus
remains charged for several minutes after power is removed.
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