2.4 d: Reference Settings
YASKAWA ELECTRIC
TOEP C710687 03B FSDrive-MV1000 Parameter Guide
147
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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 disabled 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 inputs Up 2 and Down 2 are both on or both off. The drive will use the acceleration/
deceleration 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)
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 how 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 once 5 s have elapsed 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 Reset or Disable Parameter d4-06
• The frequency reference bias function (Up/Down 2 command) has not been assigned to contact inputs
• The frequency reference source has been changed (including LOCAL/REMOTE or External reference 1/2 switch over
by contact 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 in E1-04
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d4-07: Analog Frequency Reference Fluctuation Limit (Up/Down 2)
Handles frequency reference changes while the Up 2 or Down 2 terminal 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.
This parameter is applicable only if the frequency reference is set by an analog input.
No.
Name
Setting Range
Default
d4-05
Frequency Reference Bias Operation Mode Selection (Up/Down 2)
0, 1
0
No.
Name
Setting Range
Default
d4-06
Frequency Reference Bias (Up/Down 2)
-99.9 to 100.0%
0.0%
No.
Name
Setting Range
Default
d4-07
Analog Frequency Reference Fluctuation Limit (Up/Down 2)
0.1 to 100.0%
1.0%
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