Yaskawa AC Drive-P1000 Industrial Fan - Manual (Page 185)

2. When setting more than one Jump frequency, make sure that the parameters do not overlap.
u d4: Frequency Reference Hold and Up/Down 2 Function
n d4-01: Frequency Reference Hold Function Selection
Determines whether the frequency reference or the frequency bias (Up/Down 2) value is saved when the Stop command is
entered or the power supply is shut down. This parameter is effective when either of the digital input functions listed below
are used:
• Accel/decel ramp hold function (H1-oo= A)
• Up/Down function (H1-oo = 10 and 11)
• Up/Down 2 function (H1-oo = 75 and 76)
No. Parameter Name Setting Range Default
d4-01 Frequency Reference Hold Function Selection 0, 1 0
The operation depends on the function used with parameter d4-01.
Setting 0: Disabled
• Acceleration hold
The hold value will be reset to 0 Hz when the Stop command is entered 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 Stop command is entered or the drive power is switched off.
The drive will start from 0 Hz when it is restarted.
• Up/Down 2
The frequency bias is not saved when the Stop command is entered, 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 and the drive will use the saved
value as the frequency reference when it restarts. Make sure to continuously enable the multi-function input terminal set for
“Accel/decel ramp hold” (H1-oo = A) or the hold value will be cleared when the power is switched on.
Power supply
Forward Run / Stop
Hold Accel/Decel
Frequency reference
Output frequency d4-01 = 1
d4-01 = 0
Hold Hold
OFF
OFF OFF
OFF OFF
ON
ON ON
ON ON
ON
Figure 5.30 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.
5.4 d: Reference Settings
YASKAWA SIEP YAIP1U 01B AC Drive - P1000 Technical Manual 185
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Parameter Details