Yaskawa AC Drive Z1000 AC Drive HVAC Fan - Manual (Page 60)

Power supply
Forward Run / Stop
Hold Accel/Decel
Frequency reference
Output frequency d4-01 = 1
d4-01 = 0
Hold Hold
OFF
OFF OFF
OFF OFF
ON
ON ON
ON ON
ON
Figure 1.27 Frequency Reference Hold with Accel/Decel Hold Function
• Up/Down
The frequency reference value will be saved when the Run command or the drive power is switched off. The drive will use
the frequency reference that was saved when it restarts.
Clearing the Saved Value
Depending on which function is used, it is possible to clear the saved frequency reference value by:
• Releasing the input programmed for Acceleration hold.
• Setting an Up or Down command while no Run command is active.
n d4-10: Up/Down Frequency Reference Limit Selection
Selects how the lower frequency limit is set when using the Up/Down function. Refer to Settings 10 and 11: Up/Down
Function on page 75 for details on the Up/Down function in combination with frequency reference limits.
No. Parameter Name Setting Range Default
d4-10 Up/Down Frequency Reference Limit Selection 0, 1 0
Setting 0: Lower Limit is Determined by d2-02 or Analog Input
The lower frequency reference limit is determined by the higher value of either parameter d2-02 or an analog input (A1, and
A2) that is programmed for “Frequency bias”.
Note: For example, if the command to switch the external reference (H1-oo = 2) is used to switch between the Up/Down function and an analog
input as the reference source, the analog value becomes the lower reference limit when the Up/Down command is active. Change d4-10 to
1 to make the Up/Down function independent of the analog input value.
Setting 1: Lower Limit is Determined by Parameter d2-02
Only parameter d2-02 sets the lower frequency reference limit.
u d6: Field Weakening
n d6-01: Field Weakening Level
Sets the drive output voltage for the Field Weakening function as a percentage of the maximum output voltage. Enabled when
a multi-function input is set for Field Weakening (H1-oo = 63).
No. Parameter Name Setting Range Default
d6-01 Field Weakening Level 0 to 100% 80%
n d6-02: Field Weakening Frequency Limit
Sets the lower limit of the frequency range where Field Weakening control is valid. The Field Weakening command is valid
only at frequencies above this setting and only when the output frequency matches the frequency reference (speed agree).
No. Parameter Name Setting Range Default
d6-02 Field Weakening Frequency Limit 0.0 to 240.0 Hz 0.0 Hz
1.4 d: Reference Settings
60 YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual