Delta DVP-20PM

5 Applied Instructions and Basic Usage
DVP-20PM Application Manual
5-124
API
Applicable model
20PM
174
D
D
MULR
P
P
Floating-point multiplication

Bit device Word device
X Y M S F H KnX KnY KnM KnS T C D V Z
S1
＊
S2
＊
D
＊
 Note: Please refer to specifications for more information about device
ranges.
Only the 32-bit instructions DSUBR and DSUBRP are valid.
16-bit instruction
－ － － －
32-bit instruction (13 steps)
DMULR
Continuity
instruction
DMULRP
Pulse
instruction
 Flags
Ox O100
M1808 M1968 Zero flag
M1809 M1969 Borrow flag
M1810 M1970 Carry flag
 Please refer to the additional remark below.
Explanation
 S
1
and S
2
can be floating-point values.
 S
1
: Multiplicand; S
2
: Multiplier; D: Product
 S
1
and S
2
can be floating-point values (e.g. F1.2), or data registers in which
floating-point values are stored.
 If S
1
and S
2
are data registers in which floating-point values are stored, the
function of API 172 DMULR is the same as the function of API 122 DEMUL.。
 The floating-point value in S
1
is multiplied by the floating-point value in S
2
, and
the product is stored in D.
 S
1
and S
2
can be the same register. If the instruction DSUBR is used under the
circumstances, the value in the register is multiplied by itself whenever the
conditional contact is ON in a scan cycle. Generally, the pulse instruction
DMULRP is used.
 If the absolute value of an oepration result is greater than the maximum
floating-point value available, a carry flag will be ON. If the absolute value of an
oepration reuslt is less than the minimum floating-point value available, a
borrow flag will be ON. If an operation result is 0, a zero flag will be ON.
Example 1
 When X0 is ON, the floating-point value F1.200E+0 is multiplied by the
floating-point value F2.200E+0, and the product F2.640E+0 is stored in (D11,
D10). (The floating-point value F1.2 is represented by the scientific notation
F1.200E+0 in a ladder diagram. The number of decimal places which are
displayed can be set by means of the View menu in WPLSoft.)
X0
DMULR F1.200E+0
D10
F2.200E+0
Example 2
 When X1 is ON, the floating-point value in (D1, D0) is multiplied by the
floating-point value in (D11, D10), and the product is stored in (D21, D20).
X1
D0 D10 D20DMULR