YASKAWA A1000 Technical Manual page 204

5.4 d: Reference Settings
Setting d4-03  0.00 Hz
When an Up 2 or Down 2 command is enabled, the bias is increased or decreased in steps for the value set in d4-03. The
frequency reference changes with the accel/decel times determined by parameter d4-04.
Figure 5.52

d4-04: Frequency Reference Bias Accel/Decel (Up/Down 2)
Parameter d4-04 determines the accel/decel times that are used for increasing/decreasing the frequency reference or bias
when the Up/Down 2 function is used.
No.
d4-04
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.

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.
No.
d4-05
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.

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.
No.
d4-06
204
Output
frequency
Bias
Up 2 command
Figure 5.52 Up/Down 2 Bias when d4-03  0.00 Hz
Parameter Name
Frequency Reference Bias Accel/Decel (Up/Down 2)
Parameter Name
Frequency Reference Bias Operation Mode Selection (Up/Down 2)
Parameter Name
Frequency Reference Bias (Up/Down 2)
Bias value is increased in steps as
defined in d4-03
Drive uses accel/decel times as
set in d4-04
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Setting Range
0 or 1
Setting Range
0 or 1
Setting Range
-99.9 to 100.0%
Default
0
Default
0
Default
0.0%