Statement List (STL) - DCE FEL ČVUT v Praze

Integer Math Instructions
7.7 + Add Integer Constant (16, 32-Bit)
Format
Description
Status word
Example 1
+
Address Data type Description
(16, or 32-bit integer) Constant to be added
+ adds the integer constant to the contents of ACCU 1 and
stores the result in ACCU 1. The instruction is executed without regard to, and
without affecting, the status word bits.
+ : Adds a 16-bit integer constant (in the range of -32768
to +32767) to the contents of ACCU 1-L and stores the result in ACCU 1-L.
+ : Adds a 32-bit integer constant (in the range
of - 2,147,483,648 to 2,147,483,647) to the contents of ACCU 1 and stores the result
in ACCU 1.
BR CC 1 CC 0 OV OS OR STA RLO /FC
writes: - - - - - - - - -
STL Explanation
L IW10 //Load the value of IW10 into ACCU 1-L.
L MW14 //Load the contents of ACCU 1-L to ACCU 2-L. Load the value of MW14 into
ACCU 1-L.
+I //Add ACCU 2-L and ACCU 1-L; store the result in ACCU 1-L.
+ 25 //Add ACCU 1-L and 25; store the result in ACCU 1-L.
T DB1.DBW25 //Transfer the contents of ACCU 1-L (result) to DBW25 of DB1.
Example 2
STL Explanation
L IW12
L IW14
+ 100 //Add ACCU 1-L and 100; store the result in ACCU 1-L.
>I //If ACCU 2 > ACCU 1, or IW12 > (IW14 + 100)
JC NEXT //then conditional jump to jump label NEXT.
Statement List (STL) for S7-300 and S7-400 Programming
7-8 A5E00706960-01