Toshiba VF-SX - Manual (Page 138)

TOSHIBA
13-5
If the meter reading and the LED are the same then the setup has been completed.
Return to the RUN mode by pressing the
EH]
key.
13.2 Frequency Setting Signal [rr—b], [ri—C]
RR terminal Frequency Setting Signal Characteristics:
The characteristics of the frequency signals input to the RR terminal and output
frequency signals are as shown in Figure 13.4
Adjustment of the RR input terminal bias rr~f*~bl:
At the standard default setting the adjustment has been given an allowance to
output the inverter output for the first time with a slight voltage applied on
the RR terminal. To decrease this allowance, increase the [Cl —
b
] value.
If the value is too large, the inverter output a frequency even when 0 volts is
input.
Adjustment of the RR input terminal gain rr< ---- bl:
At the standard default setting, the maximum frequency will be reached when the
RR input is slightly below the upper limit voltage. This voltage can be set to
5 volts or 10 volts with the jumper pin (J1 or J2). To set this parameter so
that the maximum frequency is reached with the upper limit voltage, lower the
value. However, if the value is lowered too far, the maximum
frequency will not be output even when the upper limit voltage is input.
To adjust the RR input terminal so that 0 volts corresponds to an inverter output
of 0 HZ, set [Tr*“b] to "125" (a change of one corresponds to about 0.01
volts). To adjust the RR input terminal so that the maximum input voltage
corresponds to the maximum inverter output frequency, set [i~ t~““ C ] to "84"
(changing this value by "1" corresponds to about 0.01 volts).
When adjusting parameters i~““b ] and C ], first adjust parameter
and then adjust parameter
NOTE
The parameter is affected by changes in the [^^”b]
parameter. If
in
—
b
] is increased the value of
iri
—
G]
should
be decreased to compensate._________