GRST Statement in SFC Action

The GRST statement automatically restarts children of the child program.
GRST is not part of the IEC 61131-3 standard.
GRST Statement
Name
GRST
Meaning
Restarts a child Sequential Function Chart (SFC) program frozen by the GFREEZE statement: all the Tokens removed by GFREEZE are restored. The extended syntax only applies to SFC child function blocks.
Syntax
GRST ( <
child_name
> );
or
GRST ( <
child_name,input1,input2,...inputn
> );
where
child_name
represents the name of the SFC child POU
input1,input2,...inputn
 indicate the value of the input parameter 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
stx_gfssfca1.png
To insert a GRST statement
  • In the language container, type
    GRST
    .
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