Siemens SIMODRIVE 611 universal Function Manual page 396

6 Description of the Functions
6.2 Positioning mode (P0700 = 3, from SW 2.1)
Phase 1:
Synchronization
using the two zero
pulses
Phase 2:
Traversing to the
reference point
(home position)
Parameter change
when
re–commissioning
(new
commissioning)
6-396
The axis traverses with the reference point shutdown velocity (P0164)
in the direction specified in P0166.
The synchronization takes place when two zero pulses are passed
(position of two zero marks). After the second zero pulse, the drive
brakes down to standstill.
The system continues with "traverse to reference point".
Note
The maximum permissible distance from the start up to the second
zero pulse can be monitored using P0171 (max. distance between
reference cams and start/zero pulses). It makes sense to set the basic
distance (clearance) for distance–coded measuring systems.
The override is not effective.
The axis traverses with the reference point approach velocity (P0165),
the reference point offset (P0162) referred to the zero of the encoder,
in the positive or negative direction.
The following is achieved when the axis reaches the reference point:
S
The reference point coordinate (P0160) is transferred as the new
reference position.
S
The "reference point set" output signal is set to a "1" signal.
Note
If, after the second zero point, a reference point approach is not
required (P0161 = 1), then the absolute position of the current position
is calculated and accepted in the drive.
The "reference point set" output signal is set to a "1" signal. Parameter
P0162 and P0160 act the same as for a reference point approach with
one zero mark. The reference point offset does not refer to the zero
mark passed, but to the encoder zero.
For a machine with distance–coded reference marks, there is not requi-
rement to reference using cams.
Standard setting when referencing with distance–coded measuring
system:
––> P0173 = 1: "Referencing without cams"
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
! not 611ue !
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04.05 01.99