YASKAWA AC Drive-A1000 Technical Manual page 174

5.4 d: Reference Settings
• 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 5.45 Up/Down 2 Example with Reference from Digital Operator and d4-01 = 1
• Up/Down 2 with frequency reference from input sources other than the digital operator
When a Run command is active and the Up/Down 2 command is released for longer than 5 s, the bias value will be saved
in parameter d4-06. When restarting after the power is switched off, the drive will add the value saved in d4-06 as a bias to
the frequency reference.
174
Power supply
OFF ON
Forward Run / Stop
OFF ON
Hold Accel/Decel
Frequency reference
Output frequency
Hold
Figure 5.44 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 31B YASKAWA AC Drive – A1000 Technical Manual
ON
ON
d4-01 = 1
d4-01 = 0