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
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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
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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
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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
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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,
Quick setup:
Project AS-i networks
)
