Filter
Top Products
9 Applied Instructions (Arithmetic and Logical Operation)
9.6 DEC / Decrement
183
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
1
Outline
2
Instruction List
3
Configuration of
Instruction
4
How to Read
Explanation of
Instructions
5
Basic Instruction
6
Step Ladder
Instructions
7
Applied Instructions
(Program Flow)
8
Applied Instructions
(Move and
Compare)
9
Applied Instructions
(Arithmetic and
Logical Operation)
10
Applied Instructions
(Rotation and
Shift Operation)
9.6 DEC / Decrement
Outline
This instruction decrements the data of a specified device by "1" (-1 addition).
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
Function and operation explanation
1. 16-bit operation(DEC, DECP)
The contents of the device specified by are decremented by "1", and the decremented result is
transferred to the device specified by .
2. 32-bit operation(DDEC, DDECP)
The contents of the device specified by are decremented by "1", and the decremented result is
transferred to the device specified by .
FX3U(C) FX3G(C) FX3S FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder/FBD ST
DEC 16 bits Continuous DEC(EN,d);
DECP 16 bits Pulse DECP(EN,d);
DDEC 32 bits Continuous DDEC(EN,d);
DDECP 32 bits Pulse DDECP(EN,d);
Variable Description
Data type
16-bit
operation
32-bit
operation
Input
variable
EN Execution condition Bit
Output
variable
ENO Execution state Bit
Device storing data to be decremented by "1" ANY16 ANY32
Operand
type
Bit Devices Word Devices Others
System User Digit Specification
System
User
Special
Unit
Index
Constant
Real
Number
Character
String
Pointer
XYMTCS
D.b
KnX KnY KnM KnS T C D R
U\G
VZModifier K H E
""
P
zzzzzz
S1 S2
zz z
DEC
EN ENO
d
DECP
EN ENO
d
DDEC
EN ENO
d
DDECP
EN ENO
d
Command input
"1" decrement data
DEC
EN ENO
d
– 1 →
d d
Command input
"1" decrement data
DDEC
EN ENO
d
d
[ +1, ] – 1 → [ +1, ]
dd d