Mitsubishi Electric FR-A700 Technical Manual page 336

V/F control, Advanced magnetic flux vector control,
General-purpose magnetic flux vector
Instantaneous (power failure) time
Power supply
(R/L1, S/L2,
T/L3)
Motor speed N
(r/min)
Inverter output
frequency f (Hz)
Inverter output
voltage E (V)
Coasting time [Pr. 57] setting
E700 D700
Coasting time [Pr. 57] setting
A700 F700
* The output shut off timing differs
according to the load condition.
Real sensorless vector control
Instantaneous (power failure) time
Power supply
(R/L1, S/L2,
T/L3)
Motor speed N
(r/min)
Inverter output
frequency f (Hz)
output voltage
E (V)
Coasting time
[Pr.57] setting
* The output shut off timing differs
according to the load condition.
3) Encoder detection frequency search
Encoder detection frequency search is valid when
the plug-in option FR-A7AP is mounted to
and encoder signal is connected.
When [Pr. 162 = 2, 12] under encoder feedback
control, the motor starts at the motor speed and in
the rotation direction detected from the encoder at
power restoration.
Encoder detection frequency search is performed
regardless of the [Pr. 162] setting under vector
control.
Executing encoder detection frequency search
will make the [Pr. 58, Pr. 299] settings invalid.
*
Restart cushion time
([Pr. 58] setting)
*
A700
A700
When encoder feedback control is invalid [Pr. 162
= 2, 12], frequency search ([Pr. 162 = 0, 10]) is
executed.
Power supply
(R/L1, S/L2, T/L3)
Motor speed N
(r/min)
Inverter output
frequency f (Hz)
Output voltage E (V)
Coasting time
* The output shut off timing differs according to the load condition.
4) Restart operation at every start
When [Pr. 162 = 10, 11, 12] is set, automatic
restart operation is also performed every start, in
addition
instantaneous power failure (start after [Pr. 57] set
time has elapsed). When [Pr. 162 = 0, 1, 2],
automatic restart operation is performed at first
start after power ON, but not performed at the
second start or later.
5) Automatic
MRS(X10) signal.
When automatic restart operation of high power
regeneration common converter (FR-HC) is
selected by setting [Pr. 30 = 2] (Refer to page 331
), automatic restart operation is performed at a
start after tuning ON
signal.
[Pr.30 = 2]
Other than 2
2
(3) Restart coasting time [Pr. 57]
Coasting time is the time from when the motor speed
is detected until automatic restart control is started.
Set [Pr. 57 = 0] to perform automatic restart operation.
The coasting time is automatically set to the value
below. Generally this setting will pose no problems.
A700 F700
1.5K or less................. 0.5s
2.2K to 7.5K................ 1s,
11K to 55K .................. 3.0s,
75K or more ............... 5.0s
E700 D700
1.5K or less................. 1s
2.2K to 7.5K................ 2s
11K or more ................ 3s
Operation may not be performed well depending on
the magnitude of the load inertia (J) or running
370
PARAMETER
Instantaneous
(power failure) time
*
Acceleration time at a restart
([Pr. 57]) (Accelerates by the slope
calculated from [Pr. 611] and
[Pr. 20].)
to the automatic restart
restart operation selection
→
OFF the MRS (X10)
Operation after turning MRS or
X10 signal OFF → ON → OFF
Restarts from [Pr.13 Start frequency]
Performs automatic restart function and
restarts
after
by