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• Activate input

Activate input

State-controlled input for activating the function block.

Data type: BOOL
Initial value: FALSE

Connection: With TRUE constant or TRUE/FALSE input signal.

Connecting Activate to an input signal makes it possible to switch off specific safety-related functions in a targeted manner (e.g., individual areas of machines and systems with a modular construction).

The function block is deactivated when Activate = FALSE. Deactivated function blocks switch their outputs to the defined safe state. S_ModeXSel = SAFEFALSE and Error = FALSE signals that no error has been detected.

Further Info Application examples and information on how to carry out individual deactivation, group deactivation or how to set up modular safety equipment using function block activation can be found in "Activating function blocks".

Value	Description
TRUE	The function block is activated, the inputs are evaluated, and the outputs switched accordingly. The function block does not provide a start-up inhibit. As a result, the status at one of the S_Mode0Sel to S_Mode7Sel outputs can immediately switch from SAFEFALSE to SAFETRUE once the function block has been activated (depending on the other input signals). Refer to the warning below this table.
FALSE	The function block is not activated. The S_Mode0Sel to S_Mode7Sel outputs are switched to SAFEFALSE.

WARNING

Unintended start-up Be sure that your risk analysis includes an evaluation for the state change at the S_Mode0Sel to S_Mode7Sel outputs after activating the safety-related function block. Make certain that appropriate procedures and measures (according to applicable sector standards) have been established to help avoid hazardous situations when activating the safety-related function block. Use appropriate safety interlocks where personnel and/or equipment hazards exist.