Parameter Details
12
12.5 d: References
YASKAWA SIEPC71061753C GA500 Technical Manual 577
■ d4-05: Up/Down 2 Bias Mode Selection
No.
(Hex.)
Name Description
Default
(Range)
d4-05
(02AC)
RUN
Up/Down 2 Bias Mode
Selection
Sets the function that saves the bias value to the drive when you open or close the two Up/Down 2
Commands [H1-xx = 75, 76]. Set d4-03 [Up/Down 2 Bias Step Frequency] = 0.00 before you set
this parameter.
0
(0, 1)
0 : Hold when Neither Up/Down Closed
When the two MFDI terminals set for Up/Down 2 Command [H1-xx = 75, 76] activate or deactivate, the drive
will hold the bias value.
1 : Reset when Neither / Both Closed
When the two MFDI terminals set for Up/Down 2 Command [H1-xx = 75, 76] activate or deactivate, the drive
will reset the bias value to 0. The drive will use the acceleration and deceleration times set in d4-04 [Up/Down 2
Ramp Selection] to accelerate and decelerate the motor to the selected output frequency.
■ d4-06: Frequency Ref Bias (Up/Down 2)
No.
(Hex.)
Name Description
Default
(Range)
d4-06
(02AD)
Frequency Ref Bias (Up/
Down 2)
Saves the bias value from the Up/Down 2 Command where the Maximum Output Frequency is
100%.
0.0%
(-99.9 - +100.0%)
The Up/Down 2 function setting changes the function of d4-06:
Note:
When the keypad sets the frequency reference, you do not usually use parameter d4-06.
• When d4-01 = 0 [Freq Reference Hold Selection = Disabled] and a source other than the keypad sets the
frequency reference, the drive adds the value set in d4-06 to the frequency reference. If the value set in d4-06 is
a negative number, the drive will subtract it from frequency reference.
• When d4-01 = 1 [Enabled] and a source other than the keypad sets the frequency reference, the drive will store
the bias value adjusted with the Up/Down 2 command in d4-06 5 seconds after you release the Up/Down 2
command. The drive adds or subtracts the value set in d4-06 to the frequency reference.
Conditions that Reset or Disable d4-06
The drive resets and disables the bias value in these conditions:
• d4-01 = 0 and the Run command was cleared.
• H1-xx = 75, 76 [MFDI Function Select = Up/Down 2 Command] is not set.
• The frequency reference source was changed.
This includes switching LOCAL/REMOTE and multi-step speed reference.
• A digital input changed the frequency reference value.
• d4-03 [Up/Down 2 Bias Step Frequency] = 0 and d4-05 = 1 [Up/Down 2 Bias Mode Selection = Reset when
Neither / Both Closed], and the two MFDI terminals set for Up/Down 2 Command [H1-xx = 75/76] are
activated or deactivated.
• The value of E1-04 [Maximum Output Frequency] was changed.
■ d4-07: Analog Freq Ref Fluctuate Limit
No.
(Hex.)
Name Description
Default
(Range)
d4-07
(02AE)
RUN
Analog Freq Ref Fluctuate
Limit
If the frequency reference changes for more than the level set to this parameter, then the bias
value will be held. The value is set as a percentage of the Maximum Output Frequency.
1.0%
(0.1 - 100.0%)
Handles frequency reference changes while Up/Down 2 Command [H1-xx = 75, 76] is activated. When the
frequency reference changes for more than the level set in d4-07, the drive will hold the bias value, and the drive
will accelerate or decelerate to the frequency reference. When the drive is at the frequency reference, it releases
the bias hold and the bias follows the Up/Down 2 input commands.
This parameter is applicable only when an analog or pulse input sets the frequency reference.
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