YASKAWA V1000 Technical Manual page 157

The operation depends on with what function parameter d4-01 is used.
Setting 0: Disabled
• Acceleration Hold
The hold value will be reset to 0 Hz when the Run command is canceled or the drive power is switched off. The active
frequency reference will be the value the drive uses when it restarts.
• Up/Down
The frequency reference value will be reset to 0 Hz when the Run command is canceled or the drive power is switched
off. The drive will start from 0 Hz when restarted.
• Up/Down 2
The frequency bias is not saved when the Run command is switched off or 5 s after the Up/Down 2 command has been
released. The Up/Down 2 function will start with a bias of 0% when the drive is restarted.
Setting 1: Enabled
• Acceleration Hold
The last hold value will be saved when the Run command or the drive power is switched off. The drive will use the value
that was saved as the frequency reference when it restarts. The accel/decel hold input must be enabled the entire time or
else the hold value will be cleared.
Power supply
Forward Run / Stop
Hold Accel/Decel
Frequency reference
Output frequency
• 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.
• Up/Down 2 with Frequency Reference from Digital Operator
When the digital operator is selected as the frequency reference source, the bias will be added to the frequency reference
that was selected 5 s after the Up/Down 2 command has been released, and then reset to 0 afterwards. The new frequency
reference value is then saved. When the Run command or the power supply is switched off, the drive will use the value
that was when it restarts.
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
OFF ON
OFF ON
Hold
Figure 5.36 Frequency Reference Hold with Accel/Decel Hold Function
ON
OFF
OFF
OFF ON
Hold
5.4 d: Reference Settings
ON
ON
d4-01 = 1
d4-01 = 0
5
157