Traverse Function (Pr. 592 To Pr. 597) - Mitsubishi Electric FR-A740-00023 Instruction Manual

4.25.7 Traverse function (Pr. 592 to Pr. 597)

Traverse operation which varies the amplitude of the frequency in a constant cycle can be performed.
Parameter
Number
592 Traverse function selection
593 Maximum amplitude amount
Amplitude compensation amount
594
during deceleration
Amplitude compensation amount
595
during acceleration
596 Amplitude acceleration time
597 Amplitude deceleration time
· When "1" or "2" is set in Pr. 592 Traverse function selection, turning on the traverse operation signal (X37) makes the
traverse function valid.
· Set "37" in any of Pr. 178 to Pr. 189 Input terminal function selection and assign the X37 signal to the external
terminal.
When the X37 signal is not assigned to the input terminal, the traverse function is always valid (X37-ON).
Output frequency(Hz)
f1
f0
f1
Pr.7
STF(STR)
ON
signal
ON
X37 signal
1) When the starting command (STF or STR) is switched on, the output frequency accelerates to the set frequency
f0 according to the normal Pr. 7 Acceleration time.
2) When the output frequency reaches f0, traverse operation can be started by switching the X37 signal on, then
the frequency accelerates to f0 + f1. (The acceleration time at this time depends on the Pr. 596 setting.)
3) After having accelerated to f0 + f1, compensation of f2 (f1 × Pr. 594) is made and the frequency decreases to f0-
f1. (The deceleration time at this time depends on the Pr. 597 setting.)
4) After having decelerated to f0 − f1, compensation of f3 (f1 × Pr. 595) is made and the frequency again accelerates
to f0 + f1.
5) If the X37 signal is turned on during traverse operation, the frequency accelerates/decelerates to f0 according to
the normal acceleration/deceleration time (Pr. 7, Pr. 8).If the start command (STF or STR) is turned off during
traverse operation, the frequency decelerates to a stop according to the normal deceleration time (Pr. 8).
Initial
Name
Value
0
10%
10%
10%
5s
5s
Traverse operation
f2
f3
t1(Pr.596) t2(Pr.597)
Special operation and frequency control
Setting Range
0 Traverse function invalid
Traverse function is valid only in the
1
external operation mode
Traverse function is valid independently
2
of operation mode
Amplitude amount during traverse
0 to 25%
operation
Compensation amount at the time of
amplitude inversion (acceleration →
0 to 50%
deceleration)
Compensation amount during
0 to 50% amplitude inversion operation
(deceleration → acceleration)
Acceleration time during traverse
0.1 to 3600s
operation
Deceleration time during traverse
0.1 to 3600s
operation
f0: set frequency
f1: amplitude amount from the set
frequency
(f0 × Pr. 593/100)
f2: compensation amount at transition from
Pr.7
acceleration to deceleration
(f1 × Pr. 594/100)
f3: compensation amount at transition from
deceleration to acceleration
Pr.8
(f1 × Pr. 595/100)
t1: time from acceleration during traverse
operation (Time from (f0 − f1) to (f0 + f1)
Time(s)
(Pr. 596)
t2: time from deceleration during traverse
operation (Time from (f0 + f1) to (f0 − f1)
(Pr. 597)
Description
369
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