![Mitsubishi Electric FX3G SERIES Скачать руководство пользователя страница 286](http://html.mh-extra.com/html/mitsubishi-electric/fx3g-series/fx3g-series_programming-manual_238902286.webp)
284
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation (
+
,
−
,
×
,
÷
) – FNC 20 to FNC 29
10.6 FNC 25 – DEC / Decrement
10.6
FNC 25 – DEC / Decrement
Outline
This instruction decrements the data of a specified device by "1".
1. Instruction format
2. Set data
3. Applicable devices
S
: This function is supported only in FX
3U
/FX
3UC
PLCs.
Explanation of function and operation
1. 16-bit operation (DEC and DECP)
The contents of
are decremented by "1", and the decremented result is transferred to
.
2. 32-bit operation (DDEC and DDECP)
The contents of [
+1,
] are decremented by "1", and the decremented result is transferred to [
+1,
].
Cautions
1. Flag operations
1) 16-bit operation
When "
−
32768" is decremented by "1", the result is "+32767". Flags (zero, carry and borrow) are not activated at
this time.
2) 32-bit operation
When "
−
2,147,483,648" is decremented by "1", the result is "+2,147,483,647". Flags (zero, carry and borrow) are
not activated at this time.
Operand type
Description
Data type
Word device number storing data to be decremented 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
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
3
3
3
3 3 3 3
S
3 3
3
DDEC
DDECP
Mnemonic
Operation Condition
P
FNC 25
DEC
D
16-bit Instruction
3 steps DEC
DECP
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 25
DECP
D
−
1
→
D
D
D
D
D
D
Command
input
FNC 25
DDECP
D
D
[ +1, ]
−
1
→
[ + 1, ]
D
D
D
Содержание FX3G SERIES
Страница 1: ...FX3G FX3U FX3UC SERIES PROGRAMMABLE CONTROLLERS PROGRAMMING MANUAL Basic Applied Instructions Edition ...
Страница 2: ......
Страница 947: ......