YASKAWA A1000 Series Technical Manual page 184

5.4 d: Reference Settings
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
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 5.46
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
Note: Make sure to set the limits for Up/Down 2 properly when using d4-01 = 1 in combination with the Up/Down 2 function.
184
Power supply
OFF ON
OFF ON
Hold Accel/Decel
Output frequency
Hold
Figure 5.45 Frequency Reference Hold with Accel/Decel Hold Function
Output
frequency
Frequency
reference
Bias
Up 2 command
Output
frequency
d4-06 value
Bias
Up 2 command
ON
OFF
OFF
OFF ON
Hold
Bias is added to frequency
reference and reset to 0
5 s
5 s
Bias is saved in parameter d4-06
5 s
5 s
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
ON
ON
common_TMonly
d4-01 = 1
d4-01 = 0
common_TMonly
common_TMonly
Refer to