Mitsubishi FX3U Series Programming Manual page 258

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DDIV and DDIVP)
[ +1,
S S
1 1
[ +1,
D D
Command
input
FNC 23
DDIV
Dividend
S
[
1
• Four devices in total starting from
remainder). Make sure that these four devices are not used for another control.
• The most significant bit of each data indicates the sign (positive: 0 or negative: 1), and data are divided
algebraically.
5500 ÷ (−540) = −10 (quotient) ... 100 (remainder)
• When a constant (K) is specified in [
the binary format.
Cautions
1. Operation result
• The most significant bit of the quotient and remainder indicates the sign (positive: 0, negative: 1)
respectively.
• The quotient is negative when either the dividend or divisor is negative.
The remainder is negative when the dividend is negative.
2. Device specified as
• The remainder is not obtained when a bit device is specified with digit specification.
• In a 32-bit operation (by DSUB or DSUBP), Z cannot be specified as
Error
• When the divisor
Program examples
1. 16-bit operation
X000
FNC 23
DIV
2. 32-bit operation
X001
FNC 23
DDIV
256
] indicates the dividend, [
]), and the remainder is transferred to [
S S
1 2
Divisor
BIN BIN
] ÷ [
S S S
+1, +1,
1 2
32 bits 32 bits
D
S
D
is "0", an operation error is caused and the instruction is not executed.
S
2
S S
1 2
D 0 D 2
S S
1 2
D 0 D 2
10 Arithmetic and Logical Operation (+, −, ×, ÷) – FNC 20 to FNC 29
+1, ] indicates the divisor, the quotient is transferred to
S S
2 2
+3,
D
D
Quotient
BIN
→ [
D D
] +1, ] ... [
2
32 bits
are occupied to store the operation result (quotient and
+1, ] or [
S S
1 1 2
D
Dividend Divisor
(D 0) ÷ (D 2) → (D 4)
D 4
100 33
D
Dividend Divisor
(D 1,D 0) ÷ (D 3,D 2) → (D 5,D 4) ... (D 7,D 6)
D 4
100,000 3333
10.4 FNC 23 – DIV / Division
+2].
D
Remainder
BIN
D D
+3, +2]
32 bits
+1, ], it is automatically converted into
S
2
.
D
Quotient Remainder
... (D 5)
3 1
Quotient Remainder
30 10