Configure Safe As-I Slaves - IFM Electronic AC402S Programming Manual

SmartPLC SafeLine AC4S with fieldbus interfaces
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6.3

Configure safe AS-i slaves

Content
Remarks .................................................................................................................................................24
Add safe AS-i slaves to the project ........................................................................................................26
Remove safe AS-i slave from project .....................................................................................................31
The safe inputs and outputs are configured via the "Device editor for logical I/Os" of the
programming system CODESYS Safety. In the following sections only the AC4S-specific
functions are described.
► Familiarise yourself with the following CODESYS functions!

Device editor for logical I/Os
→ Online help > Add-Ons > CODESYS Safety > Editors > Device editor for logical
I/Os
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6.3.1 Remarks
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Concept of the logical devices
Safe AS-i slaves are inserted in a CODESYS project via logical devices. Depending on the type of the
safe AS-i slave the logical devices fulfil different functions.
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Safe AS-i input slaves
Mapped to the classical behaviour of a programmable logic controller the logical device assumes the
functions of signal detection and signal processing. The individual functions are:

detect the code half-sequences generated by the safe AS-i input slave

pre-process the code half sequences by means of the internal logic

provide the result of the logical preprocessing as safe variable value
The programmer can configure the logical preprocessing via the parameter interface of the logical
device.
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Safe AS-i output slaves
Safe AS-i output slaves are indirectly controlled via a virtual AS-i control slave. The AS-i control slave
assumes following functions:

generate a safe code sequence for unlocking a safe AS-i output slave
AC4S detects the AS-i control slave only after the download of the safety project to AC4S.
Then the respective AS-i master generates a configuration error (unknown slave).
► Carry out projection adaptation to eliminate the error (→ Device manual,
Project AS-i
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networks)
43270
43071
43276
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43083
Quick setup: