Comparison Instructions - Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual

Comparison Instructions

=, <>, <, <=, >, >=
Instruction
Input Comparison Instructions
Note Input comparison instructions are available to compare signed or unsigned data of one-word or double length data.
Refer to 3-15-24 Single-precision Floating-point Comparison Instructions for details on single-precision floating-point
input comparison instructions and 3-16-21 Double-precision Floating-point Input Comparison Instructions for details on
double-precision floating-point input comparison instructions.
LD connection
Mnemonic
Symbol
S
S
Applicable Program Areas
Function block
Area
definitions
Usage OK
Operands
Operand Description
S1 Comparison data 1
S2 Comparison data 2
Operand Specifications
Area
CIO WR
S1
One-word
OK OK
Data
S2
S1
Double-
OK OK
length Data
S2
Flags
Name
Error Flag
Greater Than Flag
Greater Than or Equal Flag
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Mnemonic Variations
=, <>, <, <=, >,
---
>=
AND connection
S1: Comparison data 1
S2: Comparison data 2
1
2
Block program areas Step program areas
OK OK
Unsigned
double length
UINT
UINT
Word addresses
HR AR T C DM
OK OK OK OK OK
OK OK OK OK OK
Label
ER OFF or unchanged (See note.)
> • ON if S > S with one-word data.
1 2
• ON if S +1, S
1 1
• OFF in all other cases.
> = • ON if S S with one-word data.
1 2
• ON if S +1, S
1 1
• OFF in all other cases.
Function
code
Input comparison instructions compare two values
(constants and/or the contents of specified words)
300 to 328
and create an ON execution condition when the
comparison condition is true.
=, <>, <, <=, >, >=
S1: Comparison data 1
Mnemonic
S2: Comparison data 2
S
1
S
2
Subroutines
OK
Data type
Unsigned
Signed
double length
UDINT INT
UDINT INT
Indirect
DM/EM
Con-
addresses
stants
@DM *DM
EM DR
@EM *EM
OK OK OK OK OK
OK OK OK OK ---
Operation
> S +1, S with double-length data.
2 2
S +1, S with double-length data.
2 2
3. Instructions
Function
OR connection
S1: Comparison data
Mnemonic
S2: Comparison data 2
S
1
S
2
SFC action or
Interrupt tasks
transition programs
OK OK
Size
Signed
One-word Double length
DINT 1
DINT 1
Registers
Pulse
TK CF
Indirect
IR
using IR
--- OK --- ---
OK OK --- ---
3
2
2
TR
bits bits
--- ---
--- ---
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