Function library
7-37
L
EDSVS9332P-D21 EN 3.0
7.5.3.2 Absolute positioning
9300POS025
S 1S 2 S 3
H o m e p o s i t i o n
L i m i t p o s i t i o n
n e g a t i v e
C 1 2 2 4 C 1 2 2 3
E n d o f t r a v e l s w i t c h
o s i t i v e d i r e c t i o n
P O S - L I M - N E G P O S - L I M - P O SP O S - R E F - M A R K
E n d o f t r a v e l s w i t c h
n e
a t i v e d i r e c t i o n
L i m i t p o s i t i o n
p o s i t i v e
Fig. 7-16 Example of a machine with finite traversing range
Purpose
•
Use in applications with finite traversing range, e. g. in warehousing or handling machines.
Function
•
Set positioning mode (C1210) = 0 (default setting)
•
Before starting a positioning drive homing must be carried out (output POS-REF-OK = 1,
homing status C1284 = “REF-OK”). By homing the reference point of the measuring system to
the machine is determined
(E 7-49)
•
In the absolute positioning mode absolute and relative target positions can be approached.
There are two measuring systems
(E 7-39)
:
– the machine measuring system and
– the real measuring system
•
The travel range limit switches are located in front of the mechanical stops. They prevent the
drive from touching the stops.
•
Adjustable position limiting values (C1223, C1224) prevent the travel range limit switches from
being approached under normal operating conditions. A target position located outside the
position limiting value is not approached. In this case a fault is indicated (P04, P05).
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