Yaskawa AC Drive Z1000 AC Drive HVAC Fan - Manual (Page 59)

Frequency
Reference
Output
Frequency
Jump
Frequency
Width (d3-04)
Jump
Frequency 3
d3-03
Jump
Frequency 2
d3-02
Jump
Frequency 1
d3-01
Frequency
reference
decreases Frequency
reference
increases
Jump
Frequency
Width (d3-04)
Jump
Frequency
Width (d3-04)
Figure 1.26 Jump Frequency Operation
Note: 1. The drive will use the active accel/decel time to pass through the specified dead band range, but will not allow continuous operation in
that range.
2. When setting more than one Jump frequency, make sure that d3-01≥ d3-02 ≥ d3-03.
u d4: Frequency Reference Hold and Up/Down 2 Function
n d4-01: Frequency Reference Hold Function Selection
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)
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.
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.
1.4 d: Reference Settings
YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual 59
1
Parameter Details