3. Instruction Set
3-397
API Mnemonic Operands Function
175
D DIVR P
Floating point division
Controllers
ES2/EX2 SS2 SA2
SE
SX2
Bit Devices Word devices Program Steps Type
OP
X Y M S K H KnX KnY KnM KnS T C D E F
S
1
*
S
2
*
D
*
DDIVR: 13 steps
PULSE 16-bit 32-bit
ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2
Operands:
S
1
: Floating point n dividend S
2
: Floating point divisor D: Quotient
Explanations:
1. DIVR instruction divides S
1
by S
2
and stores the operation result in D
2. In DIVR instruction, floating point values can be directly entered into S
1
and S
2.
3. In DDIVR instruction, floating point values (e.g. F1.2) can be either entered directly into S
1
and
S
2
or stored in data registers for operation.
4. When S
1
and S
2
is specified as data registers, the function of DDIVR instruction is the same as
API 123 EDIV instruction.
5. If S
2
= 0, operation error occurs and M1067 = ON, M1068 = ON. D1067 stores the error code
0E19 (HEX).
6. Flags: M1020 (Zero flag), M1021 (Borrow flag) and M1022 (Carry flag)
If absolute value of the result exceeds max floating point value, carry flag M1022 = ON.
If absolute value of the result is less than min. floating point value, borrow flag M1021 = ON.
If the conversion result is 0, zero flag M1020 = ON.
Program example 1:
When X0 = ON, divide floating point number F1.200E+0 (Input F1.2, and scientific notation
F1.200E+0 will be displayed on ladder diagram. Users can set monitoring data format as float on
the function View) with F2.200E+0 and store the obtained result F0.545E+0 in D10 and D11.
X0
DDIVR F1.200E+0
D10
F2.200E+0
Program example 2:
When X1= ON, divide the floating point number value (D1, D0) by (D11, D10) and store the
obtained quotient into registers (D21, D20).
X1
DDIVR
D0 D10 D20
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