Statement List (STL) - DCE FEL ČVUT v Praze

Accumulator Instructions
14.9 INC Increment ACCU 1-L-L
Format
Description
Status word
Example
INC
Parameter Data Type Description
8-bit integer
constant
Constant added to ACCU 1-L-L; range from 0 to
255
INC (increment ACCU 1-L-L) adds the 8-bit integer to the contents
of ACCU 1-L-L and stores the result in ACCU 1-L-L. ACCU 1-L-H, ACCU 1-H, and
ACCU 2 remain unchanged. The instruction is executed without regard to, and
without affecting, the status bits.
Note
These instructions are not suitable for 16-bit or 32-bit math because no carry is made
from the low byte of the low word of accumulator 1 to the high byte of the low word of
accumulator 1. For 16-bit or 32-bit math, use the +I or +D. instruction, respectively.
BR CC 1 CC 0 OV OS OR STA RLO /FC
writes: - - - - - - - - -
STL Explanation
L MB22 //Load the value of MB22
INC 1 //Instruction "Increment ACCU 1 (MB22) by 1"; store result in ACCU 1-L-L
T MB22 //Transfer the contents of ACCU 1-L-L (result) back to MB22
Statement List (STL) for S7-300 and S7-400 Programming
14-8 A5E00706960-01