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IP 266 Machine Data, Modes and Traversing Programs
Encoder direction of rotation
The direction in which the encoder revolves is ascertained from the encoder's two
signals, which are displaced from each other by 90 deg.
Figure 5-1. Encoder Signal Evaluation
A
B
The direction changes at this point
90°
tSignal A leading Signal B leading
5.1.3 Traversing Range
Software limit switches (linear axis only)
The software limit switches are used to define the traversing range of your drive.
In a fully configured drive system, the software limit switches define the internal
boundaries of the traversing range.
Figure 5-2. Linear Axis with Range Limit Switches (not to scale)
Start of
machine
End of
machine
Table
N
A
/N
E
: Emergency limit switches start/end
(power section)
H
A
/H
E
: Hardware limit switches start/end
S
A
/S
E
: Software limit switches start/end
Deceleration distance S
Br
Clearance distance X
N
A
H
A
S
A
S
E
H
E
N
E
Traversing range
EWA 4NEB 812 6057-02
5-7
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