Siemens SIMODRIVE 611 universal Function Manual page 390

6 Description of the Functions
6.2 Positioning mode (P0700 = 3, from SW 2.1)
Starting the
reference point
approach
Axis with
reference cams
(P0173 = 0)
Phase 1:
Traverse to the
reference cams
6-390
The reference point approach can be started in the "positioning" mode
via the "start referencing" input signal.
The signal can be entered via an input terminal or via PROFIBUS–DP,
and must remain set until the end of the reference point approach
travel via the "reference point set" output signal.
If the "start referencing" signal is reset during referencing, then refer-
encing is exited and the drive stops.
For a 2–axis control board, the reference point approach for both axes
can be started and executed, either one after the other or simulta-
neously.
The approach direction for reference point approach is defined using
P0166.
Axes, which have several zero marks over their complete traversing
range (e.g. incremental, rotary measuring system), require a reference
cam to select the "correct" zero mark when referencing.
The reference point approach for these axes is executed in 3 phases:
When starting the reference point approach, the following statuses are
available:
S
Axis is located in front of the reference cam
After the reference point approach is started, the axis moves with
the reference point approach velocity (P0163) in the direction speci-
fied by P0166.
The drive detects the reference cam using the input signal "refer-
ence cam" and for a "1" signal brakes down to standstill.
It continues with the "synchronization with the zero pulse".
Note
The maximum permissible distance from the starting position up to the
reference cams can be monitored using P0170 (maximum distance to
the reference cams).
The override influences the reference point approach velocity.
S
The axis is located at the reference cam
After the reference point approach has started, it is considered as
having been completed with "travel to the reference cam".
It continues with the "synchronization with the zero pulse".
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
! not 611ue !
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