Traversing Range - Siemens SIMATIC S5 Manual

IP 266
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.
A
B
Signal A leading
90°
Figure 5-1. Encoder Signal Evaluation
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.
Start of
machine
N H S
A A
N /N : Emergency limit switches start/end
A E
(power section)
H /H : Hardware limit switches start/end
A E
S /S : Software limit switches start/end
A E
Figure 5-2. Linear Axis with Range Limit Switches (not to scale)
EWA 4NEB 812 6057-02
Machine Data, Modes and Traversing Programs
The direction changes at this point
Table
A
Traversing range
Signal B leading
End of
machine
S H N
E E E
Deceleration distance S
Clearance distance X
t
Br
5-7