Siemens SINUMERIK 802S - Page 72

Start-Up
4.3 Starting up the PLC
4-72
SINUMERIK 802S
6FC5 597–2AA00–0BP2 (01.02)
WORD COMPARES (Signed)
Instruction Ladder Symbol Valid Operands
Load Word =
And Word =
Or Word =
a = b close
a  b open
a
b
==I
a: VW, T, C, IW, QW, MW, AC, Constant,
LW
b: VW, T, C, IW, QW, MW, AC, Constant,
LW
Load Word .
And Word .
Or Word .
a ≥ b close
a t b open
a
b
> =I
LW
Load Word 3
And Word 3
Or Word 3
a ≤ b close
a u b open
a
b
< =I
DOUBLE WORD COMPARES (Signed)
Instruction Ladder Symbol Valid Operands
Load DWord =
And DWord =
Or DWord =
a = b close
a  b open
a
b
==D
a: VD, ID, QD, MD, AC, Constant, LD
b: VD, ID, QD, MD, AC, Constant, LD
Load DWord .
And DWord .
Or DWord .
a ≥ b close
a t b open
a
b
> =D
Load DWord 3
And DWord 3
Or DWord 3
a ≤ b close
a u b open
a
b
< =D
REAL WORD COMPARES (Signed)
Instruction Ladder Symbol Valid Operands
Load RWord =
And RWord =
Or RWord =
a = b close
a  b open
a
b
= =R
a: VD, ID, QD, MD, AC, Constant, LD
b: VD, ID, QD, MD, AC, Constant, LD
Load RWord .
And RWord .
Or RWord .
a ≥ b close
a t b open
a
b
> =R
Load RWord 3
And RWord 3
Or RWord 3
a ≤ b close
a u b open
a
b
< =R