Toshiba TOSVERT VF-S15 Instruction Manual page 4

3． Caution about the use of the
traverse control
Note the following information when you use the traverse function.
■ Caution about the use of a potentiometer
If an external potentiometer (analog input) is used to set the reference frequency, an error of analog input
may occur. If such an error becomes a problem, the operation panel or the preset speed operation
function should be used instead.
You can check the reference frequency by the status monitor function (Frequency command value).
■ Suspension of traverse operation
Traverse operation does not work in the acceleration/deceleration period which doesn't satisfy the starting
condition of traverse.
■ Speed reach detection band ()
(Output terminal function No. 6 and 7 (acceleration/deceleration completed))
On completion of acceleration, an acceleration/deceleration completed signal is issued in relation to the
traverse reference frequency.
If a traverse permission signal is OFF during traverse operation, the acceleration/deceleration completion
signal is effective to the output frequency. The signal is OFF in the condition that the output frequency is
the outside of the frequency range set by  (speed reach detection band).. (See Fig. 2)
Furthermore, the setting of  determines also the traverse operation start point. High frequency
setting of  enables to accelerate the machine while continuing traverse operation. Note that the
traverse frequency and the peak jump frequency before the output frequency reaches to the reference
frequency are different from those during normal operation, and they vary with the output frequency during
acceleration. (See Fig. 3)
Output frequency (Hz)
Traverse
reference
frequency
Traverse
permission
Acceleration
/deceleration
c ompletion signal
=0
*
Fig. 2: Acceleration/deceleration completed
(f102=0)
■ Set frequency attainment signal, and 
(Output terminal function No. 8 and 9 (Set frequency attainment signal))
The set frequency attainment signal set with  (Speed reach setting frequency) and  (Speed
reach detection band) operates on output frequency including traverse operation frequency.
Time (sec.)
Acceleration
ON ON
/deceleration
completion signal
Output frequency (Hz)
Traverse
reference
frequency

Traverse
permission
Fig. 3: Acceleration/deceleration completed
with f102 setting.
3
E6581877
Time (sec.)
ON