Operating instructions

5. SYSTEM PARAMETERS International English
MICROMASTER 420 Operating Instructions 75
6SE6400-5AA00-0BP0
Parameter
Number
Parameter Name
Min
Max
[Default]
Units
♦
♦♦
♦P0003 User
Access Level
♦
♦♦
♦P0004 Setting
♦
♦♦
♦Changeable
♦
♦♦
♦Status
P1200 Start on the fly
Starts inverter onto a spinning motor.
If it is possible that the motor is still spinning e.g. after a short mains break, or if the motor
can be driven by the load then flying restart must be used – otherwise overcurrent trips will
occur.
This function is particularly useful for motors with high inertia loads.
Possible Settings:
0 “flying restart inactive”
1 “flying restart always active”, starts in setpoint direction
2 “flying restart on power up, fault, OFF2”, starts in setpoint direction
3 “flying restart on fault, Off2”, starts in setpoint direction
4 “Flying restart always active. Search ONLY in setpoint direction.”
5 “flying restart on power up, fault, OFF2, Search ONLY in setpoint direction
6 “ Flying restart on fault, off2, Search ONLY in setpoint direction.”
7
I in
I out
P1202
(level 3)
F out
time
'ramps to set tpoint with
normal ramp'
rate set by P1203 (level 3)
(F
max
+ 2
fslip nom
)
It does this by rapidly changing the output frequency of the inverter until the actual motor
speed has been found. Once this happens, the motor will run up to its setpoint using the
normal ramp time.
Note:
Settings 1 to 3 search in both directions. In order to search only in direction of setpoint it is
necessary to set 4 to 6.
0
6
[0]
-
2
12
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