Pepperl+Fuchs VAA-2E-G4-SN Instruction Manual page 10

VAA-2E-G4-SN
General information
Information regarding the activation of the connected sensors (for
example with Emergency Stop activated, SN proximity switch muted,
code transfer is interrupted) is transferred as follows:
:
Activated input channel
1
2
1 and 2
None
Code words 0000, XX00 and 00XX cause the safety monitor to bring the
system to a safe state (for example in Emergency Stop) without reporting
a malfunction. If a bit of a code word deviates from the target code word,
the safety monitor switches the system into the safe state and indicates a
malfunction in the slave.
An input circuit consists of two dynamically controlled comparators that
affect 2 of the 4 data inputs of the AS-Interface interface component. One
input for SN/S1N proximity switches and one input for mechanical position
switches each are switched logically in series.
Example: An Emergency Stop with two separate circuits (Fault detection
behaviour according to Category 4) assigns both module channels.
10
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
Code Data bit D4, D3, D2, D1
XX00
00XX
0000
XXXX
1.1
S+1
1.3
S-1
2.1
S-2
2.3
S+2
Copyright Pepperl+Fuchs, Printed in Germany