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Building Technologies Division Basic documentation LMV36... CC1P7544en
Infrastructure & Citiies Sector 12 Actuators X53 / X54 25.09.2013
12.3.1 Reference run
Different reference runs are made to unambiguously determine the actuators’
permissible working range. This means that, in the event of a power failure during
referencing, the actuator is prevented from travelling to a range outside the optical
feedback system or from running against a mechanical stop. Parameters 611 and 612
must be set, depending on the mechanical design and the type of actuator used.
In the case of reference travel type 1 the SQM33 actuator first travels to the starting
point.
Note!
Always select reference travel type 2 for SQN13 and SQN14.
No. Parameter Setting for actuator
SQM33... SQN13... SQN14...
611 Type of referencing
Index 0 = Fuel 0 2 2
Index 1 = Air 0 2 2
612 Fuel 1: Type of referencing for fuel
actuator
0 2 2
No. Parameter Setting for actuator
SQM33... SQN13... SQN14...
611 Type of referencing
Index 0 = Fuel 1 3 3
Index 1 = Air 1 3 3
612 Fuel 1: Type of referencing for fuel
actuator
1 3 3
To prevent the actuator from running against a mechanical stop during referencing, the
home position may have to be adjusted (depending on the direction of rotation and a
reference point of about 3° or 87°). In the case of stops within the usable range, the
prepurge or postpurge position must be checked also.
Refer to the figure below for details of the reference travel.
Parameterization for
reference travel type 0 and
type 2
Parameterization for
reference travel type 1
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