Bias
Output
frequency
Bias is added to frequency
reference and reset to 0
Up 2 command
Frequency
reference
5 s
5 s
Figure 5.37 Up/Down 2 Example with Reference from Digital Operator and d4-01 = 1
• Up/Down 2 with Frequency Reference from Other Input Sources
When the frequency reference is set by an another source than the digital operator, the bias value will be saved in
parameter d4-06 exactly 5 s after the Up/Down 2 command has been released. When the Run command is turned off or
the power is switched off, the drive will use the value saved in d4-06 when it restarts.
Bias
Output
frequency
Up 2 command
d4-06 value
5 s
Bias is saved in parameter d4-06
5 s
Figure 5.38 Up/Down 2 Example with Other Reference than Digital Operator and d4-01 = 1
Note: Make
sure
to
set
the
Up/Down
2
limits
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 160 and Refer to d4-09: Frequency Reference Bias Lower Limit (Up/
Down 2) on page 161 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 acceleration hold input.
• Setting an Up or Down command while no Run command is active.
5.4 d: Reference Settings
158
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
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