B" Group: Fine Tuning Functions - Hitachi L100 Instruction Manual

"B" Group: Fine Tuning Functions

Restart Mode
Func.
Code
B01
B02
B03
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The "B" group of functions and parameters adjust some of the more subtle but useful
aspects of motor control and system configuration.
The restart mode determines how the
inverter will resume operation after a fault
causes a trip event. The four options
provide advantages for various situations.
The inverter can restart several times for
particular trip events:
• Over-current trip, restart up to 3 times
• Over-voltage trip, restart up to 3 times
• Under-voltage trip, restart up to 16 times
When the inverter reaches the maximum number of restarts (3 or 16), you must power-
cycle the inverter to reset its operation.
Other parameters specify the allowable under-voltage level and the delay time before
restarting. The proper settings depends on the typical fault conditions for your applica-
tion, the necessity of restarting the process in unattended situations, and whether restart-
ing is always safe.
"B" Function
Name
Selection of restart Select inverter restart method,
mode four option codes:
00... Alarm output after trip,
01... Restart at 0Hz
02... Resume operation after
03... Resume previous freq.
after freq. matching, then
decelerate to stop and display
trip info.
Allowable under- The amount of time a power
voltage power failure input under-voltage can occur
time without tripping the power
failure alarm. Range is 0.3 to
25 sec. If under-voltage exists
longer than this time, the
inverter trips, even if the restart
mode is selected.
Time delay enforced Time delay after under-voltage
before motor restart condition goes away, before the
inverter runs motor again.
Range is 0.3 to 100 seconds.
Input
power
Motor
speed
Description
no automatic restart
frequency matching
L100 Inverter
failure
B03
0
B02
Defaults DOP,DRW,DOP+
Run-
time
EU/ Func.
Units
Edit
US Code
00 — F-22
1.0 sec. F-22
1.0 sec. F-22
3–21
f
Name
IPS
POWR
IPS
UVTIME
IPS WAIT