Toshiba TOSVERT VF-MB1 Instruction Manual page 139

<<Sample sequence diagram 2: Adjustment with pulse signals>>
Forward / reverse
command
UP signal
DOWN signal
Set frequency
clearing signal
Upper limit frequency
Command frequency(Hz)
(The dotted lines represent
effective output frequencies)
OHz
If two signals are impressed simultaneously
 If a clear single and an up or down signal are impressed simultaneously, priority will be given to the
clear signal.
 If up and down signals are impressed simultaneously, The frequency will change at the specified up
or down rate.
About the setting of the initial up/down frequency
To adjust the frequency starting at a specified frequency other than 0.0 Hz (default initial frequency)
after turning on the inverter, specify the desired frequency using f268 (initial up/down frequency).
About the change of the initial up/down frequency
To make the inverter automatically save the frequency immediately before it is turned off and start
operation at that frequency next time power is turned on, set f269 (change of initial up/down
frequency) to 1 (which changes the setting of f268 when power is turned off).
Keep in mind that the setting of f268 is changed each time power is turned off.
Frequency adjustment range
The frequency can be set from 0.0Hz to fh (Maximum frequency). The lower-limit frequency will be
set as soon as the set frequency clearing function (function number 92, 93) is entered from the input
terminal.
Minimum unit of frequency adjustment
If f702 (Frequency free unit magnification) is set to 1.00, the output frequency can be adjusted in
steps of 0.01Hz.
F-19
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