292
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
10.4 FNC 23 – DIV / Division
10.4
FNC 23 – DIV / Division
Outline
This instruction executes division by two values to obtain the result (A
÷
B = C ... ).
→
For the floating point division instruction EDIV (FNC123), refer to Section 18.11.
1. Instruction format
2. Set data
3. Applicable devices
S
1:This function is supported only in FX
3U
/FX
3UC
PLCs.
S
2: Available only in 16-bit operations (Not available in 32-bit operations)
Explanation of function and operation
1. 16-bit operation (DIV and DIVP)
indicates the dividend,
indicates the divisor, the quotient is transferred to
, and the
remainder is transferred to
+1.
• The most significant bit of each data indicates the sign (positive: 0 or negative: 1), and data are divided
algebraically.
36
÷
(
−
5) =
−
7 (quotient) ... 1 (remainder)
• Two devices in total starting from
are occupied to store the operation result (quotient and
remainder). Make sure that these two devices are not used for another control.
• When a constant (K) is specified as
or
, it is automatically converted into the binary format.
Operand type
Description
Data type
Data for division or word device number storing data (dividend)
16- or 32-bit binary
Data for division or word device number storing data (divisor)
16- or 32-bit binary
Head word device number storing the division result (quotient and remainder)
32- or 64-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 3
S
1
3
3
3 3
3
3
3
3
3 3 3 3
S
1
3
3
3 3
3
3
3
3 3 3 3
S
1
S
2
3
DDIV
DDIVP
Mnemonic
Operation Condition
P
FNC 23
DIV
D
16-bit Instruction
7 steps DIV
DIVP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
2
D
S
1
S
2
D
S
1
S
2
D
D
Dividend Divisor Quotient Remainder
BIN BIN BIN BIN
( )
÷
( )
→
( ) ... ( +1)
16 bits 16 bits 16 bits 16 bits
Command
input
FNC 23
DIV
D
S
1
S
2
D
S
1
S
2
D
D
S
1
S
2