Acceleration/Deceleration Pattern And Backlash Measures; Selection Of Regeneration Unit - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
29, 140 to 143, 380 to 383, 516 to 519

Acceleration/deceleration pattern and backlash measures

Pr.29 Acceleration/deceleration pattern selection
Pr.141 Backlash acceleration stopping time
Pr.143 Backlash deceleration stopping time
Pr.381 Deceleration S-pattern 1
Pr.383 Deceleration S-pattern 2
Pr.517 S-pattern time at a completion of acceleration
Pr.519 S-pattern time at a completion of deceleraiton
Acceleration/deceleration patterns suitable for applications can be
selected.
The backlash measures to stop acceleration/deceleration at the frequency
and time set in parameter during acceleration/deceleration can be set.
Linear acceleration/deceleration
(setting "0", initial value)
⋅ For the inverter operation, the output
Setting value "0"
[Linear acceleration
frequency is made to change linearly
/ deceleration]
(linear acceleration/deceleration) to
prevent the motor and inverter from
excessive stress to reach the set
frequency
Time
deceleration, etc. when frequency
changes.
S-pattern acceleration/deceleration A
(setting "1")
Setting value "1"
⋅ For machine tool spindle applications,
[S-pattern acceleration
/deceleration A]
etc.
Used when acceleration/deceleration
fb
must be made in a short time to a
high-speed range of not lower than
Time
the base frequency.
S-pattern acceleration/deceleration B
Setting value "2" (setting "2")
[S-pattern acceleration
⋅ For prevention of load shifting in
/deceleration B]
conveyor and other applications.
Since
always made in an S shape from
current
frequency (f1), this function eases
f1
shock
deceleration and is effective for load
f2
collapse prevention, etc.
Time
Backlash measures (setting "3", Pr.140
to Pr.143 )
Setting value "3" ⋅ To
[Anti-backlash measure
deceleration is temporarily stopped.
function]
Pr. 142
Set
stopping frequency and time in Pr.140
Pr. 140
Pr. 13
to Pr.143.
Time
Pr. 143
Pr. 141
S-pattern acceleration/deceleration C (setting "4", Pr.380 to Pr.383)
⋅
The S-pattern acceleration/deceleration C switch signal (X20)
changes an acceleration/deceleration curve.
⋅ Set % of time taken for forming an S-pattern in Pr.380 to
Pr.383 as acceleration time is 100%..
Frequency
Pr.382
Output frequency Output frequency Output frequency
Set frequency Set frequency Set frequency
Pr.380
S-pattern
acceleration/
OFF
deceleration
C switchover
(X20)
S-pattern acceleration/deceleration D (setting "5", Pr.516 to Pr.519)
⋅ Set the time taken for operations for S-pattern of S-pattern
acceleration/deceleration in Pr.516 to Pr. 519 .
Pr.516 Pr.517
Start signal Start signal Start signal
ON ON ON
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.140 Backlash acceleration stopping frequency
Pr.142 Backlash deceleration stopping frequency
Pr.380 Acceleration S-pattern 1
Pr.382 Acceleration S-pattern 2
Pr.516 S-pattern time at a start of acceleration
Pr.518 S-pattern time at a start of deceleraiton
during acceleration,
acceleration/deceleration is
frequency (f2) to target
produced at acceleration/
avoid backlash, acceleration/
the acceleration/deceleration
Pr.381
Pr.383
Time
OFF
ON
Pr.518 Pr.519
Time
Pr.
Pr.
30, 70

Selection of regeneration unit

Pr.30 Regenerative function selection
When making frequent starts/stops, use the optional "high-duty
brake resistor (FR-ABR)" to increase the regenerative brake duty.
(22K or less)
Use the power regeneration common converter (FR-CV for the 55K
or less) or power regeneration converter (MT-RC 75K or more) for
continuous operation in regeneration status.
Use a high efficiency converter (FR-HC for the 55K or less, MT-HC
for the 75K or more) for harmonic suppression and power factor
improvement.
For the 75K or more, use the brake unit MT-BU5 or BR5 when the
regenerative brake duty is need to be increased due to frequent
starts and stops.
You can select either DC feeding mode 1 in which operation is
performed with DC power (terminal P, N) or DC feeding mode 2 in
which operation is performed normally with the AC power (R, S, T)
and performed with DC power such as battery at occurrence of
power failure.
<55K or less>
Pr.30 Pr.70
Regeneration Unit
Setting Setting
0 Built-in brake,
*1
(initial value) brake unit (FR-BU, BU)
High-duty brake resistor
1 10/6%
*2
(FR-ABR)
High power factor converter
0%
2 (FR-HC), power regeneration
(initial value)
common converter (FR-CV)
Built-in brake,
10
*1
brake unit (FR-BU, BU)
High-duty brake resistor
11 10/6%
*2
(FR-ABR)
Built-in brake,
20
*1
brake unit (FR-BU, BU)
High-duty brake resistor
21 10/6%
*2
(FR-ABR)
*1 The brake duty varies according to the inverter capacity.
*2 7.5K or less/11K or more
<75K or more>
Pr.30 Pr.70
Regeneration Unit
Setting Setting
0
— Not used
(initial value)
Power regeneration converter
0%
(MT-RC)
1
10% Brake unit (MT-BU5)
High power factor converter
2 —
(MT-HC)
10 — Not used
11 10% Brake unit (MT-BU5)
20 — Not used
21 10% Brake unit (MT-BU5)
Pr.70 Special regenerative brake duty
Power
Supply
R, S, T
R, S, T
P, N
P, N
P, N
R, S, T/P, N
R, S, T/P, N
Power
Supply
R, S, T
R, S, T
P, N
P, N
P, N
R, S, T/P, N
R, S, T/P, N
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