Bias
Output
frequency
Up 2 command
d4-06 value
5 s
Bias is saved in parameter d4-06
5 s
Figure 5.47 Up/Down 2 Example with Other Reference than Digital Operator and d4-01 = 1
Note:
Reference Bias Upper Limit (Up/Down 2) on page 244
and
Refer to d4-09: Frequency Reference Bias Lower Limit (Up/Down 2) on
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.
Refer to d4-06: Frequency Reference Bias (Up/Down 2) on page 243
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 = 0.00 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.
Bias
Output
frequency
Bias value is increased using the
accel/decel times as set in d4-04
Up 2 command
Figure 5.48 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.
5.4 d: Reference Settings
242
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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