Delta DVP-10PM, Applications Manual

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5
Categories and Use of Basic Application Instructions
DVP-PM Operation Instruction
5-124
API Mnemonic Operands Function
174 D MULR P Floating point multiplication
Controllers
20PM 10PM
Bit Devices Word devices Program Steps
Type
OP
X Y M S F H KnX KnY KnM KnS T C D E F
S
1
*
S
2
*
D *
DMULR, DMULRP: 13 steps
Operands:
S
1
:
Floating point multiplicand
S
2
:
Floating point multiplicator
D:
Product
Explanations:
1. DMULR instruction multiplies
S
1
with
S
2
and stores the operation result in
D
.
2. In DMULR instruction, floating point values can be directly entered into
S
1
and
S
2
.
3. In DMULR 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 DMULR instruction is the same as API 122 EMUL
instruction.
5.
S
1
and
S
2
can designate the same register. In this case, if the instruction is specified as “continuous execution
instruction” (generally DMULRP instruction) and the drive contact is ON, the register will be multiplied once in
every scan
6. Flags:
OX O100
Zero flag M1808 M1968
Borrow flag M1809 M1969
Carry flag M1810 M1970
If absolute value of the result exceeds max floating point value, carry flag will be ON.
If absolute value of the result is less than min. floating point value, borrow flag will be ON.
If the conversion result is 0, zero flag will be ON
Program Example 1:
When X0 = ON, multiply 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 F2.640E+0 in register D10 and D11
.
X0
DMULR F1.200E+0
D10
F2.200E+0
Program example 2:
When X1= ON, multiply the floating point value (D1, D0) with (D11, D10) and store the result in (D21, D20).
X1
D0 D10 D20 DMULR