2'S Complement: Neg(104) - Omron CVM1D Operation Manual

Conversion Instructions

5-17-5 2'S COMPLEMENT: NEG(104)

Ladder Symbol
(104)
NEG
Variations
j NEG(104)
Description
Precautions
Flags
Example
0000
08
S+1: CIO 0011
0 0
MBS
7 6
x16 x16
2X16
R+1: D00101
0 2
MBS
7 6
x10 x10
Operand Data Areas
S: Source word
S R
R: Result word
When the execution condition is OFF, NEG(104) is not executed. When the
execution condition is ON, NEG(104) converts the 4-digit hexadecimal content
of the source word (S) to its 2's complement and outputs the result to the result
word (R). This operation is effectively the same as subtracting S from $0000 and
outputting the result to R.
Refer to page 101 for general precautions on operand data areas.
Content of *DM word is not BCD when set for BCD.
ER (A50003):
EQ (A50006): Content of S is 0 (the content of R will also be 0 after execu-
tion)
N (A50008): Shows the status of bit 15 of R after execution.
When CIO 000008 is ON in the following example, the 4-digit hexadecimal con-
tent of CIO 0005 is converted to its 2's complement equivalent and stored in
D00020.
(104)
NEG 0005 D00020
0005 0
D00020 0
The bit contents of word 0005 and word D00020 after execution is as follows.
0005
D00020
2 D
3
5 4 3
x16 x16 x16
5 4 3 2
+13X16 +3X16 +2X16 +10=2961930
9 6
1
5 4 3
x10 x10 x10
CIO, G, A, T, C, #, DM, DR, IR
CIO, G, A, DM, DR, IR
Address Instruction
befor
execution
0 0 1 0005
0 0 0 D00020
0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
F F F
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Section 5-17
S: CIO 0010
2 0 A
2 1 0
x16 x16 x16
R: D00100
9 3 0
2 1 0
x10 x10 x10
Operands
00000 LD 000008
00001 NEG(104)
D00020
after
execution
0 0 0 1
F F F F
1
F
LSB
LSB
0005
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