gefran VDI100 Series User Manual

Figure4.4.63MinimumB.Btimeandmomentarypowerlosstime
t
t
t
t
t
t
Momentary
power loss
Minimum B.B.
Time (07-18)
Inverter B.B.
time
(b) Minimum baseblock time (07-18) is
shorter than momentary power loss time
Momentary
power loss
Minimum B.B.
Time (07-18)
Inverter B.B.
time
(a) Minimum baseblock time (07-18) greater
than momentary power loss time
Minimum base block time (07-18) is also used to for the DC braking function in combination with speed search
as follows:
- Set the minimum base block time required (07-18).
- Execute speed search or DC braking function.
- Increase minimum Baseblock time if over-current “OC” condition occurs.
- After speed search is completed, normal operation continues.
Code Parameter Name / Range
07-19 Speed Direction Search Operating Current
0~100 %
07-20 Speed Search Operating Current
0~100 %
07-21 Integral time of speed searching
0.1~10.0 s
07-22 Delay time of speed searching
0.0~20.0 s
07-23 Voltage recovery time
0.1~5.0 s
07-24 Direction-Detection Speed Search Selection
0: Disable
1: Enable
07-26 SLV Speed Search Function
0: Enable
1: Disable
07-27 Start Selection after fault during SLV mode
0: Start with speed search
1: Normal start
07-28 Start after external base block
0: Start with speed search
1: Normal start
07-32 Speed Search Mode Selection
0: Disable
1: Execute a Speed Search at Power On
07-33 Start Frequency of Speed Search Selection
0: Maximum Output Frequency of Motor
1: Frequency Command
Speed search function is used to nd the speed of a coasting motor and continue operation from that point.
The speed search function is active after a momentary power loss. In V / F + PG or SV control mode (with PG
control) speed search starts from the detected frequency (PG).
VDI100 • Instruction manual 197

gefran VDI100 Series Specifications

General

Brand	gefran
Model	VDI100 Series
Category	Inverter
Language	English