STEP 5 Operations S5-95F
Block End “BE”
The “BE” operation terminates a block. Data blocks do not need to be terminated. “BE” is always
the last statement in a block.
In structured programming, program scanning jumps back to the block where the call for the current
block was made.
Boolean logic operations cannot be continued in a higher-order block.
Example: Program block PB3 is terminated by the “BE” statement.
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BE
STL
The "BE" statement terminates
program block PB3 and causes
program scanning to return to
organization block OB1.
ExplanationProgram Sequence
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BE
OB1 PB3
JU PB3
Unconditional Block End "BEU"
The "BEU" operation causes a return within a block. However, jump operations can bypass the
"BEU" operation in function blocks (see sections 8.2.10 and 8.3.4).
Binary logic operations cannot be continued in a higher-order block.
Example: Scanning of function block FB21 is terminated regardless of the RLO.
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JC=M001
BEU
M001:
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BE
The "BEU" statement causes program
scanning to leave function block FB21
and return to program block PB8.
STL ExplanationProgram Sequence
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PB8 FB21
JC=
BEU
BE
JU FB21
8-36
EWA 4NEB 812 6210-02
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