Automationdirect.com DirectLOGIC DL205 Series User Manual

DL205 User Manual, 4th Edition, Rev. B
5–90
Chapter 5: Standard RLL Instructions - Math
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Add Real (ADDR)
Add Real is a 32-bit instruction that adds a real number, which is
either two consecutive V-memory locations or a 32-bit constant,
to a real number in the accumulator. Both numbers must
conform to the IEEE floating point format. The result is a 32-bit
real number that resides in the accumulator.
NOTE: Status flags are valid only until another instruction uses the same flag.
NOTE
1
: 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.
NOTE
2
: If the value being added to a real number is 16,777,216 times smaller than the real number, the
calculation will not work.
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 a incorrect sign bit.
SP74 On anytime a floating point math operation results in an underflow error.
SP75 On when a real number instruction is executed and a non-real number was encountered.
ADDR
A aa
a
ADDR
A aaa
ý
ý
þ
þ
230
240
250-1
260
LDR
R7.0
X1
Load the real number 7.0
into the accum ulator
ADDR
R15.0
Add the real num ber 15.0 to
the accumulator contents,
which is in r eal number
format.
00000000000000000100000110110000
8421842184218421
8421842184218421
Acc.
41 B0 0000
V1400V1401
Real Val ue
Copy the r esul t in the accum ulator
to V1400 and V1401.
OUTD
V1400
Implies 2 (exp 4)
131 -- 127 = 4
(Hex numb er)
Mantissa (23 bits)Sign Bit
40E0 0000
000040E0
(ADDR)
(Accumulator )
4170 0000+
000041B0
Acc.
7
(decimal)
+15
22
1.011 x 2 (exp 4) = 10110. binary= 22 decimal
128+2+1=131
Exponent (8 bits)
Direct
SOFT
Operand Data Type DL250-1 Range DL260 Range
A aaa aaa
V-memory V
All. See
memory map
All. See
memory map
Pointer P
All V-memory.
See memory map
All V-memory.
See memory map
Constant R
-3.402823E+038 to
+ 3.402823E+038
-3.402823E+038 to
+ 3.402823E+038
DS Used
HPP N/A

Automationdirect.com DirectLOGIC DL205 Series Specifications

General

Brand	Automationdirect.com
Model	DirectLOGIC DL205 Series
Category	Controller
Language	English