Yaskawa AC Drive-P1000 Industrial Fan - Manual (Page 187)

Bias
Output
frequency
Bias value is increased using the
accel/decel times as set in d4-04
Up 2 command
Figure 5.33 Up/Down 2 Bias when d4-03 = 0.00 Hz
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.
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 5.34 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.
Note: The functionality of setting 1 is only accessible via MEMOBUS/Modbus communications.
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.
5.4 d: Reference Settings
YASKAWA SIEP YAIP1U 01B AC Drive - P1000 Technical Manual 187
5
Parameter Details