Specifications

IEC 1131-3 Instructions
10-8
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Compare Not Equal
The Compare Not Equal function compares IN1 and IN2
with the Boolean result placed in OUT. The input and
output data types can vary, but must be of the same
type.
Byte comparisons are unsigned. Integer, double integer,
and real comparisons are signed.
Inputs/Outputs Operands Data Types
Inputs
(LAD & FBD)
IB, QB, MB, SB, SMB, VB, LB, IW, QW, MW, SW, SMW, VW, LW,
T, C, AIW, ID, QD, MD, SD, SMD, VD, LD, HC, AC, Constant,
*VD, *AC, *LD
BYTE, INT, DINT,
REAL
OUT (LAD only) Power Flow BOOL
OUT(FBD only) I, Q, M, SM, T, C, V, S, L, Power Flow BOOL
Compare Less Than
The Compare Less Than function compares IN1 less
than IN2 with the Boolean result placed in OUT. The
input and output data types can vary, but they must be of
the same type.
Byte comparisons are unsigned. Integer, double integer,
and real comparisons are signed.
Inputs/Outputs Operands Data Types
Inputs
(LAD & FBD)
IB, QB, MB, SB, SMB, VB, LB, IW, QW, MW, SW, SMW, VW, LW,
T, C, AIW, ID, QD, MD, SD, SMD, VD, LD, HC, AC, Constant,
*VD, *AC, *LD
BYTE, INT, DINT,
REAL
OUT (LAD only) Power Flow BOOL
OUT (FBD only) I, Q, M, SM, V, S, L, Power Flow BOOL
L
A
D
F
B
D
NE
IN1
IN2
OUT
222 224
333
221
NE
EN
L
A
D
F
B
D
LT
IN1
IN2
OUT
222 224
333
221
LT
EN