Siemens SINAMICS S150 NEMA, Руководство по эксплуатации

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Functions, monitoring and protective functions
9.4 Extended functions
Enclosed Drives
668
Operating Instructions, 12/2018, A5E36652151A
Note
In this case the direction of approach to the encoder zero mark is the opposite to the
axes with reference cams!
– External zero mark available (p0494 ≠ 0 or p0495 ≠ 0), no reference cams
(p2607 = 0):
Synchronization to an external zero mark begins as soon as the signal at binector
input p2595 (start referencing) is detected. The drive accelerates to the velocity,
specified in parameter p2608 (zero mark approach velocity) in the direction specified
by the signal of binector input p2604 (reference point approach start direction).
The drive synchronizes to the first external zero mark (p0494 or p0495). The drive
continues at the same speed and travel to the reference point is started (see step 3).
Note
The velocity override is not active.
Parameter p0494 or p0495 (equivalent zero mark at input terminal) can be used to set
an equivalent zero mark and to select the corresponding digital input. As standard, for
increasing actual position values, the 0/1 edge is evaluated and for decreasing actual
position values, the 1/0 edge. This can be inverted for an equivalent zero mark using
parameter p0490 (measurement probe or equivalent zero mark).
● Reference point approach, step 3: Travel to reference point
Travel to the reference point is started when the drive has successfully synchronized to
the reference zero mark (see step 2). Once the reference zero mark has been detected,
the drive accelerates on-the-fly to the reference point approach velocity set in parameter
p2611. The drive moves through the reference point offset (p2600), i.e. the distance
between the zero mark and reference point.
Once the axis has reached the reference point, the actual position and setpoint position
value are set to the value specified at connector input p2598 (reference point
coordinates) (connector input p2598 is linked to adjustable parameter p2599 as
standard). The axis is then referenced and the status signal r2684.11 (reference point
set) set.
Note
The velocity override is not active during this process.
If the braking distance is greater than the reference point offset or if a change of direction
is needed due to the set reference point offset, then the drive first brakes to a standstill
once the reference zero mark has been detected and then moves backwards.