Siemens SIMATIC IM 151/CPU Manual page 137

B.2 Abbreviations
The following abbreviations and mnemonics are used in the Instruction List:
Abbre-
viation
k8 8-bit constant
k16 16-bit constant
k32 32-bit constant
i8 8-bit integer
i16 16-bit integer
i32 32-bit integer
m P#x.y (pointer)
n Binary constant
p Hexadecimal constant
LABEL Symbolic jump address (max. 4 cha-
racters)
B.3 Tab
ACCU1 and ACCU2 (32 Bits)
The accumulators are registers for processing bytes, words or double words. The
address IDs are loaded into the accumulators, where they are logically gated. The
result of the logic operation (RLO) is always in ACCU1.
The accumulators are 32 bits long.
Accumulator designations:
ACCU1
ACCU1-L
ACCU1-H
ACCU1-LL
ACCU1-LH
ACCU1-HL
ACCU1-HH
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Stands for
ACCU
ACCU2
ACCU2-L
ACCU2-H
ACCU2-LL
ACCU2-LH
ACCU2-HL
ACCU2-HH
Example
32
62 531
127 624
–155
+6523
–2 222 222
P#240.3
1001 1100
EA12
DEST
Bit
Bits 0 to 31
Bits 0 to 15
Bits 16 to 31
Bits 0 to 7
Bits 8 to 15
Bits 16 to 23
Bits 24 to 31
Instruction List
B-3