YASKAWA CR700, Техническое руководство, Страница: 630 / 886

11.5 d: References
630 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Note:
Set this parameter to 0.0 Hz to disable the Jump frequency.
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d3-03: Jump Frequency 3
No.
(Hex.)
Name Description
Default
(Range)
d3-03
(0296)
Jump Frequency 3
Sets the median value of the frequency band that the drive will avoid.
0.0 Hz
(Determined by A1-02)
Note:
Set this parameter to 0.0 Hz to disable the Jump frequency.
■
d3-04: Jump Frequency Width
No.
(Hex.)
Name Description
Default
(Range)
d3-04
(0297)
Jump Frequency Width
Sets the width of the frequency band that the drive will avoid.
1.0 Hz
(Determined by A1-02)
◆
d4: Frequency Ref Up/Down & Hold
The d4 parameters set the Frequency Reference Hold function and Up/Down 2 commands.
WARNING! Sudden Movement Hazard. When you use the drive in a lifting application, you must also install external safety
circuitry. The drive does not have protection against accidental load drops in lifting applications. Install electrical and/or
mechanical safety circuit mechanisms that are isolated from the drive circuitry. If you do not use external safety circuitry, the
drive could drop the load and cause serious injury or death.
WARNING!
Sudden Movement Hazard. When you use a mechanical holding brake with the drive in a lifting application, you
must close the brake if an input terminal triggers the Baseblock command to stop drive output. If you enter the baseblock
command, the motor will suddenly coast and the load will slip, which can cause serious injury or death.
• Frequency Reference Hold Function Command: This acceleration/deceleration ramp hold command uses an
MFDI to momentarily stop the acceleration/deceleration of the motor, and continues to operate the motor at the
output frequency at which the command reference was input. Turn OFF the acceleration/deceleration ramp hold
command to continue acceleration/deceleration.
With a crane for example, use the function and a 2-stage push button to stop acceleration and operate at low
speed with one of the output frequencies.
• Up/Down command: The Up/Down command is a function to activate and deactivate an MFDI to increase and
decrease the frequency reference. The Up/Down command overrides frequency references from the analog input
terminal and keypad.
■
d4-01: Freq Reference Hold Selection
No.
(Hex.)
Name Description
Default
(Range)
d4-01
(0298)
Freq Reference Hold
Selection
Sets the drive to save the frequency reference when the Stop command is entered or the drive is
de-energized.
0
(0, 1)
This parameter is available when H1-xx [MFDI Function Selection] has been set to one of the following.
•
H1-xx = A [Accel/Decel Ramp Hold]
•
H1-xx = 10/11 [Up/Down Command]
The Frequency Reference Hold function depends on which function it is combined with.
0 : Disabled
• Acceleration/Deceleration Ramp Hold
When you enter a Stop command or de-energize the drive, the hold value is reset to 0 Hz. The drive will use the
active frequency reference when it restarts.
• Up/Down Command
When you enter a Stop command or de-energize the drive, the frequency reference value is reset to 0 Hz. The
drive will start from 0 Hz when it restarts.
1 : Enabled
• Acceleration/Deceleration Ramp Hold
When you clear the Run command or de-energize the drive, it will save the last hold value. The drive will use
the saved value as the frequency reference when it restarts.
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV