Statement List (STL) - DCE FEL ČVUT v Praze

14.3 POP CPU with Two ACCUs
Format
Description
Status word
Example
POP
Accumulator Instructions
POP (CPU with two ACCUs) copies the entire contents of ACCU 2 to ACCU 1.
ACCU 2 remains unchanged. The instruction is executed without regard to, and
without affecting, the status bits.
BR CC 1 CC 0 OV OS OR STA RLO /FC
writes: - - - - - - - - -
STL Explanation
T MD10 //Transfer contents of ACCU 1 (= value A) to MD10
POP //Copy entire contents of ACCU 2 to ACCU 1
T MD14 //Transfer contents of ACCU 1 (= value B) to MD14
Contents ACCU 1 ACCU 2
before executing POP instruction value A value B
after executing POP instruction value B value B
Statement List (STL) for S7-300 and S7-400 Programming
A5E00706960-01 14-3