Traverse Function - Mitsubishi Electric FR-E800 Series Instruction Manual

15.3

Traverse function

The traverse operation, which oscillates the frequency at a constant cycle, is available.
Pr.
592 Traverse function
A300 selection
593 Maximum amplitude
A301 amount
Amplitude
594
compensation amount
A302
during deceleration
Amplitude
595
compensation amount
A303
during acceleration
596 Amplitude acceleration
A304 time
597 Amplitude deceleration
A305 time
• Setting Pr.592 Traverse function selection = "1 or 2" enables the traverse function.
• Assigning the Traverse function selection (X37) signal to the input terminal enables 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 parameter from Pr.178 to Pr.189 (Input terminal function selection) to assign the function to a terminal.
Output frequency(Hz)
f0
Pr.7
STF(STR)
ON
signal
X37 signal
• 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 the motor to f0 + f1, this is compensated with f2 (f1 × Pr.594), and the motor decelerates to
f0 - f1. The deceleration time at this time is according to the Pr.597 setting.
• After the inverter decelerates the motor to f0 - f1, this is compensated with f3 (f1 × Pr.595), and the motor accelerates again
to f0 + f1.
• When the X37 signal turns OFF during traverse operation, the inverter accelerates/decelerates the motor 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 inverter decelerates the motor to a stop according to the normal deceleration time (Pr.8).
378
15. (A) Application Parameters
15.3 Traverse function
Name Initial value
0
10%
10%
10%
5 s
5 s
Traverse operation
f2
f1
f1
f3
t2 t1
(Pr.597) (Pr.596)
ON
Setting range
0 Traverse function invalid
Traverse function valid only in External operation
1
mode
Traverse function valid regardless of the operation
2
mode
0% to 25% Level of amplitude during traverse operation
Compensation amount during amplitude inversion
0% to 50%
(from acceleration to deceleration)
Compensation amount during amplitude inversion
0% to 50%
(from deceleration to acceleration)
Time period of acceleration during traverse
0.1 to 3600 s
operation
Time period of deceleration during traverse
0.1 to 3600 s
operation
f0: set frequency
f1: amplitude amount from the set frequency
(f0 × Pr.593/100)
Pr.7
f2: compensation amount at transition from
acceleration to deceleration
(f1 × Pr.594/100)
f3: compensation amount at transition from
Pr.8
deceleration to acceleration
(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