YASKAWA OYMC V1000

1.7 H: Terminal Functions
YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 145
Parameter Details
1
Using the Up/Down Function with Frequency Reference Hold (d4-01)
• When the frequency reference hold function is disabled (d4-01 = 0), the Up/Down
frequency reference will be reset to 0 when the Run command is cleared or the power is
cycled.
• When d4-01 = 1, the drive will save the frequency reference set by the Up/Down function.
When the Run command or the power is cycled, the drive will restart with the reference
value that was saved. The value that was saved can be reset by closing either the Up or
Down input without having a Run command active. Also refer to d4-01: Frequency
Reference Hold Function Selection on page 100.
Using the Up/Down Function with Frequency Reference Limits
The upper frequency reference limit is determined by parameter d2-01.
The value for the lower frequency reference limit depends on the setting of parameter d4-10
and can be set by an analog input or parameter d2-02. Refer to d4-10: Up/Down Frequency
Reference Limit Selection on page 107 for details. When a Run command is applied, the
lower limits work as follows:
• If the lower limit is set by parameter d2-02 only, the drive will accelerate to this limit as
soon as a Run command is entered.
• If the lower limit is determined by an analog input only, the drive will accelerate to the
limit as long as the Run command and an Up or Down command are active. It will not
start running if only the Run command is on.
• If the lower limit is set by both an analog input and d2-02, and the analog limit is higher
than the d2-02 value, the drive will accelerate to the d2-02 value when a Run command is
input. Once the d2-02 value is reached, it will continue acceleration to the analog limit
only if an Up or Down command is set.
The figure below shows an Up/Down function example with a lower frequency reference
limit set by d2-02 and the frequency reference hold function enabled/disabled.