YASKAWA A1000 HHP Programming Manual page 65

Figure 1.44 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.
Reference Bias Upper Limit (Up/Down 2) on page 67
page 67 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.
• Resetting parameter d4-06 to zero.
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.
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 times determined
by parameter d4-04.
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.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Output
frequency
d4-06 value
Bias
Up 2 command
Refer to d4-06: Frequency Reference Bias (Up/Down 2) on page 66
Parameter Name
Frequency Reference Bias Step (Up/Down 2)
Output
frequency
Bias
Up 2 command
Figure 1.45 Up/Down 2 Bias when d4-03 = 0.00 Hz
Bias is saved in parameter d4-06
5 s
5 s
and Refer to d4-09: Frequency Reference Bias Lower Limit (Up/Down 2) on
Bias value is increased using the
accel/decel times as set in d4-04
1.4 d: Reference Settings
Refer to d4-08: Frequency
for details.
Setting Range
0.00 to 99.99 Hz
Default
0.00 Hz
1
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