YASKAWA A1000 Technical Manual page 203

• Up/Down 2 with frequency reference from input sources other than the digital operator
When a Run command is active and the Up/Down 2 command is released for longer than 5 s, the bias value will be
saved in parameter d4-06. When restarting after the power is switched off, the drive will add the value saved in d4-06
as a bias to the frequency reference.
Figure 5.50
Figure 5.50 Up/Down 2 Example with Other Reference than Digital Operator and d4-01 = 1
Note: Make sure to set the limits for Up/Down 2 properly when using d4-01 = 1 in combination with the Up/Down 2 function.
d4-08: Frequency Reference Bias Upper Limit (Up/Down 2) on page 205
Lower Limit (Up/Down 2) on page 205
Clearing the Value that was Saved
Depending on which function is used, the frequency reference value that was saved can be cleared by:
• Releasing the input programmed for Acceleration hold.
• Setting an Up or Down command while no Run command is active.
• Parameter d4-06 is reset to zero. Refer to

d4-03: Frequency Reference Bias Step (Up/Down 2)
Sets the bias that is added to or subtracted from the frequency reference by the Up/Down 2 function.
No.
d4-03
The operation depends on the set value:
Setting d4-03 = 0.00 Hz
While the Up 2 or Down 2 command is enabled, the bias value is increased or decreased using the accel/decel time
determined by parameter d4-04.
Figure 5.51
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Bias is saved in parameter d4-06
Output
frequency
d4-06 value
Bias
5 s
Up 2 command
for details on the limit settings.
d4-06: Frequency Reference Bias (Up/Down 2) on page 204
Parameter Name
Frequency Reference Bias Step (Up/Down 2)
Output
frequency
Bias
Up 2 command
Figure 5.51 Up/Down 2 Bias when d4-03 = 0.00 Hz
5.4 d: Reference Settings
5 s
and Refer to d4-09: Frequency Reference Bias
Setting Range
0.00 to 99.99 Hz
Bias value is increased using the
accel/decel times as set in d4-04
Refer to
for details.
Default
0.00 Hz
5
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