Operating coasting motor without trip I
To operate coasting motor without trip, use the,speed search command or
DC injection braking at start.
• Speed search command
Restarts a coasting motor without stopping it. This funciion enables
smooth switching between motor commercial power supply operation and
inverter'operation.
Set input terminal function selection (n06, 07 or 08) to "1 I'" (search
command from maximum output frequency) or "12" (search command
from set frequency).
Build a sequence so that FWD (REV) run command is input at the same
time as the search command or after the search command. If the run
command is input before the search command, the search command
becomes disabled.
Time chart at search command input
EWD(REV)RUNCOMMAND _ _"
SEARCHCOMMAND _ AGREED SPEED
MAX.OUTPUTFREQUENCYOR l
I DETECTION
FREQUENCYREFERENCEAT , , j_
RUNCOMMANDINPUT II
OUTPUT FREQUENCY i __
MIN. BASEBLOCK I SPEED SEAI_CH OPERATION
TIME I '
I
• DC injection braking at start (n46, n48)
Restarts a coasting motor after stopping it. Set the DC injection braking
time at start in n48 in units of O. I second. Set DC injection braking current
in n46 in units of I% (inverter rated current =100%). When the setting of
n48 is "0", DC injection braking is not performed and acceleration starts
from the minimum output frequency.
n29 _--
MIN. OUTPUT /
FREOUEN____
i. i
n48
• DC INJECTION BRAKING
' TIMEATSTART 39
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