TOSHIBA
10.6
Pattern Run
The pattern run enables the user to run up to seven different speeds automatically, in
either forward or reverse directions. It is an extension of the seven preset speeds
described on page 9-9. Unlike the Preset Speed Function, the user can pre-select the
length of time in which the inverter will operate at each frequency (Sr1-Sr7), as well as
the acceleration/deceleration pattern used to reach each frequency.
The required preset function parameters are as follows:
1)
Actual run frequencies (Sr1~Sr7) are located in Speed Group Parameter
[:S.PrG] Item 2 through 8.
2)
The run time for each of these frequencies in the pattern (Pt.1t~Pt.7t) is
located in Pattern Frequency Group Parameters [:P.PrG] Item 6, 8, 10,
12, 14, 16, and 18.
3)
The particular ACC/DEC drive characteristics, including the run direction, to be
used is located in Pattern Frequency Group Parameters [:P.PrG] Item 7, 9, 11,
13, 15, 17, and 19.
The run time set for each pattern includes the ACC/DEC time required to reach that
particular run frequency. Therefore, care must be taken when choosing run times. For
example, if the pattern run time is set for 30 seconds and the acceleration time required
to reach the preset frequency is 20 seconds, then the actual run frequency would last
only 10 seconds.
10 - 4
Sr2
Sr4
(Pt.5t)
(Pt.4t)
Pattern 4
Pattern 5
(Pt.3t)
Pattern 3
Pattern 3 acc.
(Pt.3)
(Pt.2t)
Pattern 2
Sr5
Sr3
Pattern 5 acc.
(Pt.5)
Pattern 5 dec.
(Pt.5)
Pattern 4 dec.
(Pt.4)
Pattern 3 dec.
(Pt.3)
Sr1
Pattern 2 acc.
(Pt.2)
Pattern 1 acc.
0
(Pt.1)
(Pt.1t)
Pattern 1
The following graph shows a sample of a typical pattern run:
Output
frequency
Time
20
30
Pattern 1 (Pt.1t)
Output
frequency
0
10
Sr1
Pattern 1 acc. (Pt.1)
Forward
direction
Reverse
direction
Time
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