Statement List (STL) - DCE FEL ČVUT v Praze

Load and Transfer Instructions
9.8 LAR2 Load Address Register 2 with Double
Integer (32-Bit Pointer)
Format
Description
Status word
LAR2
Address Data type Memory area Source address
DWORD
pointer constant
D, M, L 0...65532
LAR2 loads address register AR2 with the contents of the addressed double
word or a pointer constant. ACCU 1 and ACCU 2 remain 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: - - - - - - - - -
Example: Direct addresses
STL Explanation
LAR2 DBD 20 //Load AR2 with the pointer in data double word DBD20.
LAR2 DID 30 //Load AR2 with the pointer in instance data double word DID30.
LAR2 LD 180 //Load AR2 with the pointer in local data double word LD180.
LAR2 MD 24 //Load AR2 with the pointer in memory double word MD24.
Example: Pointer constant
STL Explanation
LAR2 P#M100.0 //Load AR2 with a 32-bit pointer constant.
Statement List (STL) for S7-300 and S7-400 Programming
9-8 A5E00706960-01