5.2 b: Application
190
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
Setting 1: Run command at power up is accepted
If an external Run command is active when the drive is powered up, then the drive will start to operate the motor as soon
as it gets ready for operation (i.e., once the internal start up process is complete).
WARNING!
Sudden Movement Hazard. If b1-17 is set to 1 and an external Run command is active during power up, the motor will
begin rotating as soon as the power is switched on. Proper precautions must be taken to ensure that the area around the motor is safe
prior to powering up the drive. Failure to comply may cause serious injury.
■
b1-21: Start Condition Selection at Closed Loop Vector Control
There is normally no need to change this parameter from the default value.
Selects a condition to start Closed Loop Vector Control.
Setting 0: Run command is not accepted when b2-01
≤
motor speed < E1-09.
Setting 1: Run command is accepted when b2-01
≤
motor speed < E1-09.
■
b1-24: Commercial Power Switching Selection
When the output frequency matches the power supply frequency (60 Hz), the PWM switching operation stops and
switches to operation with a direct commercial power supply connection.
Note: 1.
Commercial power switching can be enabled when an induction motor is being driven in V/f or OLV control modes (A1-02 = 0 or 2).
2.
Input and output current value may change when a switch is made.
3.
Verify that the induction motor can be driven with the commercial power supply (e.g., the rated voltage and rated speed) prior to
enabling the commercial power switching selection.
0: Disabled
A voltage will be output with PWM switching operation regardless of the output frequency.
1: Enabled
When the deviation between the output frequency and the power supply frequency is less than or equal to the commercial
power switching output frequency coincidence level (b1-26), the PWM switching operation stops and switches to
operation with a direct commercial power supply connection.
Operation with a direct commercial power supply continues until the deviation between the output frequency and the
power supply frequency is greater than or equal to the commercial power switching output frequency coincidence/
non-coincidence level (b1-25 + b1-26).
■
b1-25/b1-26 Commercial Power Supply Cancellation Level/Switching Level
These parameters set the value in 0.1 Hz increments at which commercial power supply switching selection is enabled
and disabled.
When the deviation between the output frequency and the power supply frequency becomes equal to or less than the
setting values of b1-26, an output frequency coincidence condition exists.
The drive will operate in commercial power switching mode.
If the drive will not switch to commercial power supply switching mode, set b1-26.
When the deviation between the output frequency and the power supply frequency becomes equal to or greater than the
setting value of b1-25 + b1-26, the drive will operate in PWM switching mode.
If commercial power switching mode and PWM switching mode are repeated frequently, increase the setting value of
b1-25.
Note:
The drive will not switch to commercial power switching mode when L3-06, Stall Prevention Level during Run, is exceeded and
L3-05, Stall Prevention Selection during Run, is enabled.
No.
Name
Setting Range
Default
b1-21
Start Condition Selection at Closed Loop Vector Control
0 or 1
0
No.
Name
Setting Range
Default
b1-24
Commercial Power Switching Selection
0, 1
0
No.
Name
Setting Range
Default
b1-25
Commercial Power Supply Cancellation Level
0.4 to 6.0 Hz
1.0 Hz
b1-26
Commercial Power Supply Switching Level
0.0 to 3.0 Hz
0.2 Hz
SIEP_C710636_02B_1_0.book 190 ページ ２０１５年１１月２５日 水曜日 午後４時５６分
