Automationdirect.com DL06 - Page 255

DL06 Micro PLC User Manual, 3rd Edition, Rev. E
5-94
Chapter 5: Standard RLL Instructions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
NOTE: Status flags are valid only until another instruction uses the same flag.
NOTE: The current HPP does not support real number entry with automatic conversion to the 32-bit
IEEE format. You must use DirectSOFT for this feature.
MULR
A aaa
DirectSOFT32 Display
LDR
R7.0
X1
Load thereal number 7.0
into theaccumulator.
MULR
R 15.0
Multiply theaccumulator
contentsbythe real num ber
15.0
0 0000000000000000 100001011010010
8 421842184218421
8 421842184218421
Acc.
42D2 0000
V1400V1401
Real Va lue
Copy theresultinthe accumulator
to V1400 and V1401.
OUTD
V1400
Implies2(exp 6)
133 -- 127 =6
(Hex number)
Sign Bit
40E00000
000040E0
(MULR)
(Accumulator)
4170 0 000X
000042D 2
Acc.
7
(decimal)
x15
105
1.101001 x2(exp 6) =1101001. binary= 105 decimal128 +4+1=133
Exponent (8 bits)
Mantissa (23 bits)
Operand Data Type DL06 Range
A
aaa
V-memory V See memory map
Pointer P See memory map
Real Constant R -3.402823E +38 to + -3.402823E +38
Discrete Bit Flags Description
SP63 On when the result of the instruction causes the value in the accumulator to be zero.
SP70 On anytime the value in the accumulator is negative.
SP71 On anytime the V-memory specified by a pointer (P) is not valid.
SP72 On anytime the value in the accumulator is an invalid floating point number.
SP73 On when a signed addition or subtraction results in an incorrect sign bit.
SP74 On anytime a floating point math operation results in an underflow error.
DS Used
HPP Used
DirectSOFT
Multiply Real (MULR)
The Multiply Real instruction multiplies a real number in
the accumulator with either a real constant or a real number
occupying two consecutive V-memory locations. The result
resides in the accumulator. Both numbers must be Real data type
(IEEE floating point format).