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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.
Frequency Reference Bias Upper Limit (Up/Down 2) on page 166
Refer to d4-09: Frequency Reference Bias Lower Limit (Up/
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:
5.4 d: Reference Settings
164
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual