5.4 d: Reference Settings
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual 235
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 5.45
Figure 5.45 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.
• 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 5.46
Figure 5.46 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.
Figure 5.47
Figure 5.47 Up/Down 2 Example with Other Reference than Digital Operator and d4-01 = 1
Power supply
Forward Run/Stop
Hold Accel/Decel
Frequency reference
Output frequency
d4-01 = 1
d4-01 = 0
Hold Hold
OFF
OFFOFF
OFF OFF
ON
ON ON
ON ON
ON
Bias
Output
frequency
Bias is added to frequency
reference and reset to 0
Up 2 command
Frequency
reference
5 s
5 s
Bias
Output
frequency
Up 2 command
d4-06 value
5 s
Bias is saved in parameter d4-06
5 s
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