Statement List (STL) - DCE FEL ČVUT v Praze

Program Control Instructions
10.2 BE Block End
Format
Description
Status word
Example
BE
BE (block end) terminates the program scan in the current block and causes a jump
to the block that called the current block. The program scan resumes with the first
instruction that follows the block call statement in the calling program. The current
local data area is released and the previous local data area becomes the current
local data area. The data blocks that were opened when the block was called are
re-opened. In addition, the MCR dependency of the calling block is restored and the
RLO is carried over from the current block to the block that called the current block.
BE is not dependent on any conditions. However, if the BE instruction is jumped
over, the current program scan does not end and will continue starting at the jump
destination within the block.
The BE instruction is not identical to the S5 software. The instruction has the same
function as BEU when used on S7 hardware.
BR CC 1 CC 0 OV OS OR STA RLO /FC
writes: - - - - 0 0 1 - 0
STL Explanation
A I 1.0
JC NEXT //Jump to NEXT jump label if RLO = 1 (I 1.0 = 1).
L IW4 //Continue here if no jump is executed.
T IW10
A I 6.0
A I 6.1
S M 12.0
BE //Block end
NEXT: NOP
0
//Continue here if jump is executed.
Statement List (STL) for S7-300 and S7-400 Programming
10-2 A5E00706960-01