GSTART Statement in SFC Action
Starts a Sequential Function Chart (SFC) child program or function block by placing a token into each of its initial steps. The abbreviated syntax is equivalent to an SFC Child action block having the S qualifier. The extended syntax only applies to SFC child function blocks.
Children of the child program are not automatically started by the GSTART statement.
Since GSTART is not part of the IEC 61131-3 standard, it is preferable to use the S qualifier attached to the child name.
GSTART Statement | |
|---|---|
Name | GSTART |
Syntax | GSTART ( < child_name > );or GSTART ( < child_name,step_name,input1,input2,...inputn > )where child_name represents the name of the SFC child POUstep_name represents the name of the active step. step_name must be preceded by two underscore characters (for example, __S1)input1,input2,...inputn indicate the values of the input parameters of the SFC child POU |
Operands | the specified SFC program must be a child of the one in which the statement is written |
Return value | (none) |
Example
To insert a GSTART statement
- In the language container, typeGSTART.
Provide Feedback