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No.
Parameter Name
Setting Range
Default
b1-17
Run Command at Power Up
0, 1
1
Setting 0: Disregarded
A new Run command must be issued after power up. Cycle the Run command to start the drive.
Note:
For safety reasons, the drive is initially programmed not to accept a Run command at power up (b1-17 = 0). If a Run command is issued at
power up, the RUN indicator LED will flash quickly.
Setting 1: Allowed
The motor will start immediately after a power up if a Run command is already enabled.
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.
n
b1-24: Commercial Power Operation 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.
Switching can be enabled when an inductive motor is being driven in V/f or OLV control modes.
2.
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.
No.
Parameter Name
Setting Range
Default
b1-24
Commercial Power Switching Selection
0, 1
0
Setting 0: Disabled
A voltage will be output with PWM switching operation regardless of the output frequency.
Setting 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).
n
b1-25/b1-26: Commercial Power Supply Operation 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.
Entering Eco Mode
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.
Exiting Eco Mode
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.
Parameter Name
Setting Range
Default
b1-25
Commercial Power Supply Operation Cancellation Level
0.4 to 6.0 Hz
1.0 Hz
b1-26
Commercial Power Supply Operation Switching Level
0.0 to 3.0 Hz
0.2 Hz
u
b2: DC Injection Braking
These parameters determine operation of the DC Injection Braking and Zero Speed Control features.
1.2 b: Application
YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual
21
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Parameter Details