Mitsubishi Electric FR-A800, Instruction Manual

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(A) Application parameters Parameters
5 - 498
5.14.6 Traverse function
The traverse operation, which oscillates the frequency at a constant cycle, is available.
●
Setting Pr. 592 "Traverse function selection" = "1 or 2" will enable the traverse function.
●
Assigning the Traverse function selection (X37) signal to the input terminal will enable the traverse
function only when the X37 signal is ON. (When the X37 signal is not assigned, the traverse
function is always available.) To input the X37 signal, set "37" in any of Pr.178 to Pr.189 (input
terminal function selection) to assign the function to a terminal.
●
The motor accelerates to the set frequency f0 according to the normal Pr. 7 "Acceleration time" at
turn ON of the start command (STF or STR).
●
When the output frequency reaches f0 and the X37 signal turns ON, the inverter begins traverse
operation and accelerates to f0 + f1. The acceleration time at this time is according to the Pr. 596
setting. (If the X37 signal turns ON before the output frequency reaches f0, traverse operation
begins after the output frequency reaches f0.)
●
After the inverter accelerates to f0 + f1, this is compensated with f2 (f1 × Pr. 594), and the inverter
decelerates to f0 - f1. The deceleration time at this time is according to the Pr. 597 setting.
●
After the inverter decelerates to f0 - f1, this is compensated with f3 (f1 × Pr. 595), and the inverter
accelerates again to f0 + f1.
Pr. Name
Initial
value
Setting
range
Description
592
A300
Traverse function selection 0
0 Traverse function invalid
1
Traverse function valid only in External operation
mode
2
Traverse function valid regardless of the operation
mode
593
A301
Maximum amplitude
amount
10% 0 to 25% Level of amplitude during traverse operation
594
A302
Amplitude compensation
amount during
deceleration
10% 0 to 50%
Compensation amount during amplitude inversion
(from acceleration to deceleration)
595
A303
Amplitude compensation
amount during
acceleration
10% 0 to 50%
Compensation amount during amplitude inversion
(from deceleration to acceleration)
596
A304
Amplitude acceleration
time
5 s 0.1 to 3600 s Time period of acceleration during traverse operation
597
A305
Amplitude deceleration
time
5 s 0.1 to 3600 s Time period of deceleration during traverse operation
I002681E
Fig. 5-239: Traverse function
f0
f1
f1
f2
f3
t1 t2
Output frequency (Hz)
Pr. 7
Pr. 597 Pr. 596
Pr. 7
Pr. 8
Time(s)
Traverse operation
ON
ON
STF(STR)
signal
X37 signal
f0: set frequency
f1: amplitude amount from the set frequency
(f0 x Pr. 593/100)
f2: compensation amount at transition from
acceleration to deceleration
(f1 x Pr. 594/100)
f3: compensation amount at transition from
deceleration to acceleration
(f1 x Pr. 595/100)
t1: time from acceleration during traverse
operation (Time from (f0 – f1) to (f0 + f1))
(Pr. 596)
t2: time from deceleration during traverse
operation (Time from (f0 + f1) to (f0 – f1))
(Pr. 597)