YASKAWA A1000 Series Technical Manual

5.4 d: Reference Settings
186 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Setting 1: Accel/Decel Time 4
The drive uses accel/decel time 4 set to parameters C1-07 and C1-08.
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d4-05: Frequency Reference Bias Operation Mode Selection (Up/Down 2)
Determines if the bias value is held or not when the Up/Down 2 inputs are both released or both enabled. The parameter
is effective only when parameter d4-03 is set to 0.00.
Setting 0: Hold Bias Value
The bias value will be held if no input Up 2 or Down 2 is active.
Setting 1: Reset Bias Value
The bias is reset to 0% when both inputs Up 2 and Down 2 are either on or off. The drive will use the accel/decel time as
selected in d4-04 to accelerate or decelerate to the frequency reference value.
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d4-06: Frequency Reference Bias (Up/Down 2)
This parameter is used to save the frequency reference bias value set by the Up/Down 2 function. It is set as a percentage
of the maximum output frequency. The function of d4-06 depends on how the Up/Down 2 function is configured.
• This parameter is normally not used when the frequency reference is set by the digital operator. The user can set d4-06
to a certain value that will be applied during run, but this value will be reset when the frequency reference changes
(including multi-step references) or will be disabled when d4-01 = 0 and the Run command is removed.
• When d4-01 = 0 and the frequency reference is set by a source other than the digital operator, the value set in d4-06 is
generally added to or subtracted from the frequency reference.
• When d4-01 = 1 and the frequency reference is set by a source other than the digital operator, the bias value adjusted
with the Up/Down 2 inputs is stored in d4-06 once 5 s have passed after the Up 2 or Down 2 command is released. The
frequency reference will then return to what it was without the Up/Down 2 command.
Conditions that Generally Reset or Disable Parameter d4-06
• When the Up/Down 2 function has not been assigned to the multi-function terminals
• When the frequency reference source has been changed (including LOCAL/REMOTE or External reference 1/2 switch
over by digital inputs)
• If d4-03 = 0 Hz, d4-05 = 1 and the Up/Down 2 commands are both open or both closed
• Any changes to the maximum frequency set to E1-04
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d4-07: Analog Frequency Reference Fluctuation Limit (Up/Down 2)
This parameter is for handling changes in the frequency reference while the terminal set for Up 2 or Down 2 is enabled.
If the frequency reference changes for more than the level set to d4-07, then the bias value will be held, and the drive will
accelerate or decelerate following the frequency reference. When the frequency reference is reached, the bias hold is
released and the bias follows the Up/Down 2 input commands.
Parameter d4-07 is applicable only if the frequency reference is set by an analog or pulse input.
No. Parameter Name Setting Range Default
d4-05 Frequency Reference Bias Operation Mode Selection (Up/Down 2) 0 or 1 0
No. Parameter Name Setting Range Default
d4-06 Frequency Reference Bias (Up/Down 2) -99.9 to 100.0% 0.0%
No. Parameter Name Setting Range Default
d4-07 Analog Frequency Reference Fluctuation Limit (Up/Down 2) 0.1 to 100.0% 1.0%

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)