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Unexpected movement of the motor when flying restart is activated
When the flying restart (p1200) function is active, the drive may still be accelerated by the
search current despite the fact that it is at standstill and the setpoint is 0!
For this reason, death, serious injury, or considerable material damage can occur if
personnel enter the working area of a motor in this state.
• Observe the general safety instructions.
• Ensure that the EMERGENCY STOP functions are always fully functional.
Note
Flying restart without encoder for permanently-excited synchronous motors
The flying restart without encoder for permanently-excited synchronous motors is possible
only when a VSM10 Voltage Sensing Module is used to acquire the motor speed
(option K51).
Flying restart without encoder for long cables
In the case of long motor cables, the procedure described above can lead to problems
during a flying restart. In such cases, the following settings can improve the flying restart
function:
● Enter the cable resistance in parameter p0352 before motor data identification.
● Set parameter p1203 to at least 300%.
With this setting, flying restart takes longer than for values below 300%.
Note
Optimize the flying restart function
To optimize the flying restart, a trace recording should check the function. If necessary, you
can improve the result by making settings for parameters p1202 and p1203.
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
WARNING
Functions, monitoring and protective functions
9.3 Drive functions
529
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