Bias
Output
frequency
Up 2 command
d4-06 value
5 s
Bias is saved in parameter d4-06
5 s
Figure 5.46 Up/Down 2 Example with Other Reference than Digital Operator and d4-01 = 1
Note: Set the limits for Up/Down 2 properly when using d4-01 = 1 in combination with the Up/Down 2 function. Refer to d4-08: Frequency
Reference Bias Upper Limit (Up/Down 2) on page 177 and Refer to d4-09: Frequency Reference Bias Lower Limit (Up/Down 2) on page
177 for details on the limit settings.
Clearing the Saved Value
Depending on which function is used, it is possible to clear the saved frequency reference value by:
• Releasing the input programmed for Acceleration hold.
• Setting an Up or Down command while no Run command is active.
• Reset parameter d4-06 to zero. Refer to d4-06: Frequency Reference Bias (Up/Down 2) on page 176 for details.
n
d4-03: Frequency Reference Bias Step (Up/Down 2)
Sets the bias added to or subtracted from the frequency reference by the Up/Down 2 function.
No. Parameter Name Setting Range Default
d4-03 Frequency Reference Bias Step (Up/Down 2) 0.00 to 99.99 Hz 0.00 Hz
The operation depends on the set value:
Setting d4-03 = 0.0 Hz
While the Up 2 or Down 2 command is enabled, the bias value is increased or decreased using the accel/decel times determined
by parameter d4-04.
Bias
Output
frequency
Bias value is increased using the
accel/decel times as set in d4-04
Up 2 command
Figure 5.47 Up/Down 2 Bias when d4-03 = 0.0 Hz
Setting d4-03 ≠0.0 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.
5.4 d: Reference Settings
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
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5
Parameter Details
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