Statement List (STL) - DCE FEL ČVUT v Praze

Load and Transfer Instructions
9.5 LAR1 Load Address Register 1 with Double
Integer (32-Bit Pointer)
Format
Description
Status word
LAR1
Address Data type Memory area Source address
DWORD
pointer constant
D, M, L 0...65532
LAR1 loads address register AR1 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
LAR1 DBD20 //Load AR1 with the pointer in data double word DBD20.
LAR1 DID30 //Load AR1 with the pointer in instance data double word DID30.
LAR1 LD180 //Load AR1 with the pointer in local data double word LD180.
LAR1 MD24 //Load AR1 with the contents of memory double word MD24.
Example: Pointer constant
STL Explanation
LAR1 P#M100.0 //Load AR1 with a 32-bit pointer constant.
Statement List (STL) for S7-300 and S7-400 Programming
9-6 A5E00706960-01