Statement List (STL) - DCE FEL ČVUT v Praze

Load and Transfer Instructions
9.3 L STW Load Status Word into ACCU 1
Format
Description
Status word
Example
L STW
L STW (instruction L with the address STW) loads ACCU 1 with the contents of the
status word. The instruction is executed without regard to, and without affecting, the
status bits.
Note
For the S7-300 series CPUs, the statement L STW does not load the FC, STA, and
OR bits of the status word. Only bits 1, 4, 5, 6, 7, and 8 are loaded into the
corresponding bit positions of the low word of accumulator 1.
BR CC 1 CC 0 OV OS OR STA RLO /FC
writes: - - - - - - - - -
STL Explanation
L STW //Load contents of status word into ACCU 1.
The contents of ACCU 1 after the execution of L STW is:
Bit 31-9 8 7 6 5 4 3 2 1 0
Content: 0 BR CC 1 CC 0 OV OS OR STA RLO /FC
Statement List (STL) for S7-300 and S7-400 Programming
9-4 A5E00706960-01