SF_RS (FB)

Description of the function block

Tip

The version of the function block as described here corresponds to the latest version of the function block in Version list of function blocks.

Tip

SF_RS is a bistable function block from the SafetyStandard library. It is an extension of RS, a standard IEC 61131-3 function block. The SF_RS function block contains both standard data types and safety-related data types (prefix: SAFE).

SF_RS is a bistable function block from the SafetyStandard standard library with dominant reset.

Figure 115. Function block: SF_RS

Table 95. VAR_INPUT

Name	Data Type	Initial Value	Description, parameter values
`SET`	`SAFEBOOL`	`FALSE`	Input to set `Q1`
`RESET1`	`BOOL`	`FALSE`	Input to reset `Q1`, reset dominant

Table 96. VAR_OUTPUT

Name	Data Type	Initial Value	Description, parameter values
`Q1`	`SAFEBOOL`	`FALSE`