YASKAWA A1000 Technical Manual page 202

5.4 d: Reference Settings
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 multi-function input terminal set for "Accel/decel
ramp hold" (H1- = A) must be enabled the entire time, or else the hold value will be cleared when the power is
switched on.
Figure 5.48
Forward Run / Stop
Frequency reference
• 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 a Run command is active and the Up/Down 2 command is released for longer than 5 s, the Up/Down 2 bias
value is added to the frequency reference and then reset to 0. This new frequency reference is saved and will also be
used to restart the drive after the power is cycled.
Figure 5.49
Figure 5.49 Up/Down 2 Example with Reference from Digital Operator and d4-01 = 1
202
Power supply
OFF ON
OFF ON
Hold Accel/Decel
Output frequency
Hold
Figure 5.48 Frequency Reference Hold with Accel/Decel Hold Function
Output
frequency
Frequency
reference
Bias
Up 2 command
ON
OFF
OFF
OFF ON
Hold
Bias is added to frequency
reference and reset to 0
5 s
5 s
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
ON
ON
d4-01 = 1
d4-01 = 0