SF_EmergencyStop (FB)¶

FUNCTION_BLOCK SF_EmergencyStop

This function block is a safety-related function block for monitoring an emergency stop button.
This Function block can be used for emergency switch off functionality (stop category 0), or - with additional peripheral support - as emergency stop (stop category 1 or 2).
Function block according to PLCopen, Technical Committee 5: Safety Software (Technical Specification), Part 1: Concepts and Function Blocks, Version 2.01 (2020-2)

InOut:

Scope	Name	Type	Initial	Comment
Input	`Activate`	`BOOL`	FALSE	Activation of the FB.
	`S_EStopIn`	`BOOL`	FALSE	Safety demand input.
	`S_StartReset`	`BOOL`	FALSE	Start behaviour of safety FB
	`S_AutoReset`	`BOOL`	FALSE	Behaviour on error of safety FB
	`Reset`	`BOOL`	FALSE	Manual reset of FB
Output	`Ready`	`BOOL`	FALSE	Activation of the FB. TRUE indicates that the FB is activated and the outputs results are valid, FALSE the FB is not active and the program is not executed.
	`S_EStopOut`	`BOOL`	FALSE	Output for the safety-related response.
	`SafetyDemand`	`BOOL`	FALSE	Output indicating that the FB is active and the primary safety function is demanded (e.g. related to the safety functionality).
	`ResetRequest`	`BOOL`	FALSE	Output which can be used to signal the operator to press the reset functionality to continue.
	`Error`	`BOOL`	FALSE	Error flag
	`DiagCode`	`WORD`	0	Diagnostic register