A variable of this Data Type contains an enumerated value corresponding to one of the operational states of a managed function block as defined in subclause 6.3.2 of IEC 61499-1:2012. This enumeration is defined as shown below.

TYPE FB_STATE : (* Managed FB states per IEC 61499-1, Figure 24 *)
   (IDLE, (* Enumerated value 0 *)
    RUNNING, (* Enumerated value 1 *)
    STOPPED, (* Enumerated value 2 *)
    KILLED) (* Enumerated value 3 *)
     ;
END_TYPE