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Section 4 TCL Displays SFC Display Operation
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point the program has progressed to). There are three highlight states: Base, Last-
Executed, and Executed. Table 5 lists the highlight states and their colors.
Conditions
Step conditions contain tag references for operator control. There are three highlight
states for condition statements: Base, Executed-True (the expression in the
statement directly following the condition is true), and Executed-False (the
expression is false). Refer to Table 5 for highlight colors.
Selecting a condition provides direct control access to the database reference
associated with the condition. You can change the value of the referenced database
point in order to satisfy the expression in the statement following the condition.
To gain control access, right click on a transition button, then select either the Loop
FCM Display or the faceplate for the loop associated with the transition. You can
change loop values from either the Loop FCM Display or faceplate.
Transitions
Step transitions contain tag references for operator control. There are three highlight
states for transition statements: Base, Evaluated-True (the transition expression is
evaluated as true), and Evaluated-False (the transition expression is evaluated as
false). Refer to Table 5 for highlight colors.
Table 5. SFC Highlight States
Presentation ACTIVITY CONDITION TRANSITION
White on gray or blue Base Base Base
Green on gray Executed Executed-True Evaluated-True
Goldenrod on gray <Not Used> Executed-False Evaluated-False
Black on green Last-Executed <Not Used> <Not Used>
Operator access to the database reference is only available after the statement has
been executed.