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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
28 Data Comparison – FNC220 to FNC249
28.1 FNC224~230 – LD =, >, <, <>, <=, >= / Data Comparison
28.1 FNC224~230 – LD =, >, <, <>, <=, >= / Data Comparison
Outline
These instructions compare numeric values, and set a contact to ON when the condition agrees so that an operation is
started.
1. Instruction format
2. Set data (common among FNC224 to FNC230)
3. Applicable devices (common among FNC224 to FNC230)
S1: This function is supported only in FX3G/FX3GC/FX3U/FX3UC PLCs.
S2: This function is supported only in FX
3U/FX3UC PLCs.
Operand Type Description Data Type
Device number storing comparison data 16- or 32-bit binary
Device number storing comparison data 16- or 32-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD
.b KnX KnY KnM KnS T C D R
U\G
VZModifyKH E "
"P
S1 S2
S1 S2
FNC 224
LD=
D
Mnemonic Operation Condition
16-bit Instruction
5 steps
LD=
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
9 steps
LDD=
Continuous
Operation
FNC 225
LD>
D
Mnemonic Operation Condition
16-bit Instruction
5 steps
LD>
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
9 steps
LDD>
Continuous
Operation
FNC 226
LD<
D
Mnemonic Operation Condition
16-bit Instruction
5 steps
LD<
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
9 steps
LDD<
Continuous
Operation
FNC 228
LD<>
D
Mnemonic Operation Condition
16-bit Instruction
5 steps
LD<>
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
9 steps
LDD<>
Continuous
Operation
FNC 229
LD<=
D
Mnemonic Operation Condition
16-bit Instruction
5 steps
LD<=
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
9 steps
LDD<=
Continuous
Operation
FNC 230
LD>=
D
Mnemonic Operation Condition
16-bit Instruction
5 steps
LD>=
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
9 steps
LDD>=
Continuous
Operation
S
1
S
2
S
1
S
2