Siemens MICROMASTER 420 - Manual (Page 128)

3 Functions Issue 07/04
MICROMASTER 420 Operating Instructions
128 6SE6400-5AA00-0BP0
The number of start attempts is specified using parameter P1211. The number is
internally decremented after each unsuccessful attempt. After all attempts have
been made (as specified in parameter P1211), automatic restart is cancelled with
message F0035. After a successful start attempt, the counter is again reset to the
initial value.
NOTE
The "Flying restart" function (refer to Section 3.16) must be additionally
activated if, for an automatic restart, the drive inverter is to be connected to a
motor which may already be spinning.
DANGER
For longer line supply failures (blackouts)and when the automatic restart
function is activated, over a longer period of time it may be assumed that
MICROMASTER is powered-down. However, when the line supply returns,
motors can automatically start to run again without any operator intervention.
If the operating range of the motors is entered in this status, this can result in
death, severe injury or material damage.