Mitsubishi Electronics FX3G User Manual
654
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
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.
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 FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
S2: This function is supported only in FX
3U
/FX
3UC
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
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D .b KnX KnY KnM KnS T C D
R
U \G
V
Z Modify K H
E
" "
P
S
1
S
2
S
1
S
2
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