Siemens LMV51 Series Basic Documentation page 50

Note
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Between these points, the actuators are adjusted during their continuous travel. The
speeds of the individual actuators will be calculated such that they reach their targets at
the same time.
The speed of the fastest actuator can be parameterized.
Parameter: OperatRampStage
When parameterizing the multistage operating ramp, the speed of the slowest actuator
must be taken into consideration!
When changing from stage 1 to stage 2, first «switch-on point S2» is approached, starting
from «operating point S1». Now, the second fuel valve is opened.
Then, the system travels to «operating point S2».
If the output shall be cut back to stage 1, first «switch-off point S2» will be approached.
If «switch-off point S2» has not yet been set, «switch-on point S2» will be approached
and the fuel valve closed.
Then, the ratio position of «operating point S1» will be approached again.
The procedure is analogous when switching from stage 2 to stage 3 and back again.
Basic Documentation LMV51...
4 Fuel / air ratio control (FARC)
CC1P7550en
29.05.2002