Bias
Output
frequency
Bias is added to frequency
reference and reset to 0
Up 2 command
Frequency
reference
5 s
5 s
Figure 5.35 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 5.36 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 141
and
Refer to d4-09: Frequency Reference Bias Lower Limit (Up/
Down 2) on page 141
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
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
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Parameter Details
7/16/2008-13:23
