28
HA0373T Rev Ck May 2017
Chapter 4
feedback signals. Later when the beam is restored, closed loop operation will resume
and continue control starting from the last valid beam position.
Note that because automatic switchover assumes the knowledge of the last valid
closed loop beam position that is lost when the controller is powered down, this option
cannot be persisted. For a similar reason, the controller will always power up in open
loop mode.
