09.2008 Functions
Siemens AG 6SE7087-6QX70 (Version AK)
SIMOVERT MASTERDRIVES Compendium Motion Control 7-37
In the case of a rotary axis (U858.1 <> 0), we speak of an axis cycle.
The axis cycle can lie in the counting range from
0 to +2
31
-1 = 2147483647 [LU]
Also in the case of a rotary axis, absolute equality is created between
the setpoint position and actual position value within an axis cycle.
This means that the target position only lies within the axis cycle.
The movement is specified by the direction: shortest path, only positive
or only negative.
See: evaluation of direction selection D_FWD / D_BWD
The setpoint is calculated and corrected (MODULO) within the axis
cycle for both negative and positive setpoints.
Example:
-5000 becomes 3192 with AZL = 4096 (5000 MOD 4096)
Gearbox
Motor
d
Fig. 7-11 Example of rotary axis, the rotary table
With rotary axis
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