An instance of this Function Block type converts an output event of a function block instance into the textual representation of the corresponding service primitive as described in IEC 61499-1. The input and output variables of this block, and the algorithm for mapping inputs to outputs, are defined as follows:

VAR_INPUT
    SRCI : WSTRING; (* Source Name, e.g., "DEV1.RES2.FB3" *)
    ENAME : WSTRING; (* Event output name  from reporting FB, e.g., "INITO" *)
    QI : BOOL; (* QO output from status reporting FB *)
    STATUS : WSTRING; (* STATUS report, e.g., "OK" *)
END_VAR
VAR_OUTPUT
    SRC : WSTRING; (* Pass-through of SRCI *)
    PRIM : WSTRING; (* Service Primitive, e.g., "INITO+(OK)" *)
END_VAR
ALGORITHM REQ IN Java : (* Normally executed algorithm *)
SRC.value = SRCI.value;
PRIM.value = ENAME.value + (QI.value ? "+(" : "-(") + STATUS.value + ')';
END_ALGORITHM