Glossary - Siemens SIMOTICS L-1FN3 Configuration Manual

Glossary

Absolute position measuring system
By using several reading tracks, the motor is able to recognize the current position with the
absolute position measuring system immediately after switching on. The position is
recognized without traversing distance and is transmitted via the serial EnDat interface. The
measurement path is limited and more expensive due to the more complex measurement
track
Gantry operation
In gantry operation, the synchronous motion of two motors is implemented via two
independent axis drives including position measuring system.
Incremental position measuring system
To determine the position of the motor in the machine using an incremental position
measuring system, the motor must travel to a reference point after being switched on. There
are several reference points with the distance-coded incremental position measuring system.
Higher speeds can be reached if open incremental encoders are used.
Janus arrangement
In a Janus arrangement, the phases V and W must be swapped for the → stoker, so that →
master und → stoker run in the same direction. The cable outlets of the motors are located
on opposite sides.
Master
The term "Master" describes the first of two motors in an axis fed by a shared power module,
which are therefore connected in parallel. → Parallel connection
Parallel connection of motors
The parallel connection of two identical motors to one power module doubles the power
available for the drive in comparison with just one such motor. Both motors must have a
defined position to one another for synchronous power generation. The motors must be
rigidly coupled to one another to guarantee the defined position of the motors relative to one
another throughout operation.
Only one position measuring system is required to control the motors.
1FN3 linear motors
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
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