Specifications

IEC 1131-3 Instructions
10-7
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
10.2 IEC Compare Instructions
There are no non-standard IEC Compare instructions.
Compare Equal
The Compare 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
L
A
D
F
B
D
EQ
IN1
IN2
222 224
333
221
EQ
OUT
EN