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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation (
+
,
−
,
×
,
÷
) – FNC 20 to FNC 29
10.5 FNC 24 – INC / Increment
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
10.5 FNC 24 – INC / Increment
Outline
This instruction increments the data of a specified device by "1".
1. Instruction format
2. Set data
3. Applicable devices
S: This function is supported only in FX3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (INC and INCP)
The contents of are incremented by "1", and the increment result is transferred to .
2. 32-bit operation (DINC and DINCP)
The contents of [ +1, ] are incremented by "1", and the increment result is transferred to [ +1,
].
Cautions
1. Note that data is incremented in every operation cycle in a continuous operation type
instruction.
2. Flag operations
1) 16-bit operation
When "+32767" is incremented by "1", the result is "−32768". Flags (zero, carry and borrow) are not activated at
this time.
2) 32-bit operation
When "+2,147,483,647" is incremented by "1", the result is "−2,147,483,648". Flags (zero, carry and borrow) are
not activated at this time.
Operand type Description Data type
Word device number storing data to be incremented by "1" 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
3333333 S 33 3
DINC
DINCP
Mnemonic Operation Condition
P
FNC 24
INC
D
16-bit Instruction
3 steps
INC
INCP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
5 steps
Continuous
Operation
Pulse (Single)
Operation
D
D
D
D
Command
input
FNC 24
INCP
+ 1
→
D
D
D
D
D
D
D
Command
input
FNC 24
DINCP
D
D
[ +1, ] + 1
→
[ + 1, ]
D
D
D