Delta DVP-10PM, Applications Manual

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5
Categories and Use of Basic Application Instructions
DVP-PM Application Manual 5-123
API Mnemonic Operands Function
173 D SUBR P Floating point subtraction
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 *
DSUBR: 13 steps
Operands:
S
1
:
Floating point minuend
S
2
:
Floating point subtrahend
D:
Remainder
Explanations:
1. DSUBR instruction subtracts
S
1
with
S
2
and stores the operation result in
D
.
2. In DSUBR instruction, floating point values can be directly entered into
S
1
and
S
2.
.
3. In DSUBR 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 DSUBR instruction is the same as API 121 ESUB
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 DSUBRP instruction) and the drive contact is ON, the register will be subtracted once in
every scan.
7. 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, subtract 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 F-1.000E+0 in register D10 and D11.
X0
DSUBR F1.200E+0 D10
F2.200E+0
Program example 2:
When X0 = ON, subtract the floating point value (D1, D0) with (D3, D2) and store the result in (D11, D10).
X0
DSUBR
D0
D2
D10