IFM Electronic AC402S Programming Manual page 109

SmartPLC SafeLine AC4S with fieldbus interfaces
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Operation mode of the fail-safe PLC
The fail-safe PLC of AC4S can be operated in the following modes:

Offline mode
In the offline mode the user is logged out of the fail-safe PLC or there is no connection between
CODESYS and the fail-safe PLC (e.g. connection loss).

Online mode
In the online mode the user is logged in to the fail-safe PLC.
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States of the fail-safe PLC
The fail-safe PLC of AC4S can take the following states:

Unload
In the state "unload" no safe application is stored on AC4S.

Unsafe operation (debug mode)
In the state "unsafe operation" a download application or a boot application is stored on AC4S
which is in the STOP state (→
The debug mode has the following sub-states:

Unsafe (DL)
In the sub-state "unsafe" a safe application is stored on AC4S.

Unsafe (BA)
In the sub-state "unsafe (BA)" a safe boot application is stored on AC4S.

Safe operation
In the state "safe operation" a safe boot application is stored on AC4S which is in the RUN state
(→ States of the safe application
The state "safe operation" has the following sub-states:

SAFE + logged in
In the sub-state "SAFE + logged in" the fail-safe PLC is in the online mode (→
mode of the fail-safe PLC

Logged out
In the sub-state "logged out" the fail-safe PLC is in the offline mode (→
the fail-safe PLC
In the online mode the current operating status of the safe PLC is displayed in the CODESYS
status bar.
States of the safe application
(→ S. 110)).
(→ S. 109)).
(→ S. 109)).
(→ S. 110)).
Operation
Operation mode of
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