STEP 5 Operations Manual S5-115F
Conditional block end ”BEC”
The ”BEC” operation causes a return within a block if the previous condition has been satisfied
(RLO = 1).
Otherwise, linear program scanning is continued with RLO ”1”.
Example: Scanning of program block FB 20 is terminated if the RLO = ”1”.
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S Q 1.0
A I 20.0
BEC
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The ”BEC” statement causes program
scanning to return to program block
PB 7 from function block FB 20 if
input I 20.0 is ”1”.
STL ExplanationProgram Sequence
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PB 7 FB 20
A I 20.0
BEC
JU FB 20
3.1.9 Other Operations
Table 3-9 lists other basic operations.
Table 3-9. Other Operations
Operation MeaningOperand
ID
STP Stop at the end of program scanning.
Current program scanning is terminated. The PIQ is read out. Then
the PLC goes into the ”STOP” mode.
NOP 0 ”No” Operation
Sixteen bits in the RAM are set to ”0”.
NOP 1 ”No” Operation
Sixteen bits in the RAM are set to ”1”.
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BLD Display Generation Operation
”BLD” means a display generation operation for the programmer.
Parameter
130, 131, 132, 133, 255
Method of representation: only STL possible
3-38
EWA 4NEB 811 6149-02
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