S_AOPD_Out output

Output for enable signal of the function block.

The enable signal depends on the status of the protective device and the start-up inhibit.

Data type: SAFEBOOL

This signal represents the state of the safety-related equipment and is the enable signal for the entire process. Connect this signal in the safety logic such that, when the function block outputs a SAFEFALSE signal, the application switches to the defined safe state and retains it.

Hinweis
As the enable signal is present at the S_AOPD_Out output, this output is also referred to as the enable output.

Connection: Connect the S_AOPD_Out output to an output terminal of your application, either directly or via other safety-related functions/function blocks.

The enable signal may only control the process directly if this does not adversely affect the safety-related function.

WARNUNG

Unintended machine operation

Verify that the enable signal only controls the process directly if this does not adversely affect the safety-related function.

Validate the overall safety-related function, including the start-up behavior of the process, and thoroughly test the application.

Value Description

SAFETRUE No stop function is requested. The following conditions must be met:

The function block has been activated (input Activate = TRUE)

and the light beam of the safety-related equipment (e.g., light barrier) is not interrupted (S_AOPD_In = SAFETRUE)

and no start-up inhibit is active (setting made with S_StartReset)

and the function block has not detected an error.

Hinweis
When muting is active (S_MutingActive = SAFETRUE) or when an override operation is active (OverrideActive = TRUE), the light beam of the safety-related equipment may be interrupted in accordance with the above conditions. The S_AOPD_Out output remains SAFETRUE.

SAFEFALSE The stop function is requested.
This may be due to one of the following reasons:

The function block is not active (input Activate = FALSE)

or a start-up inhibit is active (setting made with S_StartReset)

or the function block has detected an error.

Monitoring time set at MaxMutingTime has elapsed

or the muting sequence is invalid

or the light beam of the safety-related equipment (e.g., light barrier) has been interrupted while muting was not active (S_AOPD_In = SAFEFALSE) and no override operation is active (OverrideActive = FALSE)

or the override operation is interrupted by the operator (S_StartStopOverride = SAFEFALSE) and the function block detects an error

or the override operation has been automatically exited and the function block detects an error.

The risk of unintended start-up/restart and/or manipulation can be reduced by combining a stop request from the safety-related application and an operation stop from the standard application.

WARNUNG

Unintended start-up

Make certain that appropriate procedures and measures (according to applicable sector standards) have been established to help avoid hazardous situations when starting up the Sicherheitssteuerung.

Make certain that no unintended start-up/restart or manipulation can occur.

Validate the overall safety-related function, including the start-up/restart behavior of the process, and thoroughly test the application.

Precise details of the behavior of the S_AOPD_Out output in relation to the start-up inhibit are given in the following table:

Formal parameter Value Action Start-up inhibit Reset Enable output

S_StartReset SAFETRUE After function block activation/Sicherheitssteuerung start-up, the start-up inhibit is ... not active No action is required at Reset, ...

to switch the enable output S_AOPD_Out to SAFETRUE if there is a valid input signal combination.

to exit the start-up inhibit.

SAFEFALSE active Reset must be switched from FALSE to TRUE, ...

Formal parameter	Value	Action	Start-up inhibit	Reset	Enable output
S_StartReset	SAFETRUE	After function block activation/Sicherheitssteuerung start-up, the start-up inhibit is ...	not active	No action is required at Reset, ...	to switch the enable output S_AOPD_Out to SAFETRUE if there is a valid input signal combination. to exit the start-up inhibit.
S_StartReset	SAFEFALSE		active	Reset must be switched from FALSE to TRUE, ...