5.4 d: Reference Settings
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 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: Ma
ke sure to 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 205 and Refer to d4-09: Frequency Reference Bias
Lower Limit (Up/Down 2)
on page 205 for details on the limit settings.
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 act
ive.
• Parameter d4-06 is reset to zero. Refer to d4-06: Frequency Reference Bias (Up/Down 2) on page 204 for details.
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.
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
Figure 5.51 Up/Down 2 Bias when d4-03 = 0.00 Hz
No. Parameter Name Setting Range Default
d4-03 Frequency Reference Bias Step (Up/Down 2) 0.00 to 99.99 Hz 0.00 Hz
Bias
Output
frequency
Up 2 command
d4-06 value
5 s
Bias is saved in parameter d4-06
5 s
Bias
Output
frequency
Bias value is increased using the
accel/decel times as set in d4-04
Up 2 command
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