Bias
Output
frequency
Up 2 command
Bias value is increased in steps as
defined in d4-03
Drive uses accel/decel times as
set in d4-04
Figure 5.49 Up/Down 2 Bias when d4-03
≠
0.00 Hz
n
d4-04: Frequency Reference Bias Accel/Decel (Up/Down 2)
Determines the accel/decel times used to increase or decrease the frequency reference or bias when using the Up/Down 2
function.
No.
Parameter Name
Setting Range
Default
d4-04
Frequency Reference Bias Accel/Decel (Up/Down 2)
0, 1
0
Setting 0: Current Accel/Decel Time
The drive uses the currently active accel/decel time.
Setting 1: Accel/Decel Time 4
The drive uses accel/decel time 4 set to parameters C1-07 and C1-08.
n
d4-05: Frequency Reference Bias Operation Mode Selection (Up/Down 2)
Determines if the bias value is held 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.
No.
Parameter Name
Setting Range
Default
d4-05
Frequency Reference Bias Operation Mode Selection
(Up/Down 2)
0, 1
0
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 inputs Up 2 and Down 2 are both on or both off. The drive will use the accel/decel time as selected
in d4-04 to accelerate or decelerate to the frequency reference value.
n
d4-06: Frequency Reference Bias (Up/Down 2)
Saves the frequency reference bias value set by the Up/Down 2 function as a percentage of the maximum output frequency.
The function of this parameter depends on the Up/Down 2 function configuration. This parameter is not normally used when
the digital operator sets the frequency reference.
• The value set to d4-06 will be applied during run, however the value is reset when the frequency reference changes (including
multi-step references) and is 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 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 when 5 s have passed after releasing the Up 2 or Down 2 command. The frequency
reference will return to the value without the Up/Down 2 command.
No.
Parameter Name
Setting Range
Default
d4-06
Frequency Reference Bias (Up/Down 2)
-99.9 to 100.0%
0.0%
Conditions that Reset or Disable d4-06
• The Up/Down 2 function has not been assigned to the multi-function terminals.
• The frequency reference source has been changed (including LOCAL/REMOTE or External reference 1/2 switch over by
digital inputs).
5.4 d: Reference Settings
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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5
Parameter Details
Summary of Contents for U1000 iQpump Drive
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