Two's Complement Of 32-Bit Binary Data (Sign Inversion) - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

Two's complement of 32-bit binary data (sign inversion)

DNEG(P)
These instructions invert the sign of the 32-bit binary data in the device specified by (d), and store the resultant data in the
device specified by (d).
Ladder diagram
(d)
FBD/LD
EN ENO
d
Setting data
■Descriptions, ranges, and data types
Operand Description
(d) Head device for storing the data that performs two's
complement
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L, SM,
F, B, SB, S

(d)
Processing details
• These instructions invert the sign of the 32-bit binary data in the device specified by (d), and store the resultant data in the
device specified by (d).
• They are used when a positive or negative sign is to be inverted.
b31
Before execution (d)
1 1 1
1
0 0 0
Sign conversion
1 1 1
-
b31
(d)
After execution 0 0 0
Precautions
Note that data is inverted in every operation cycle in a continuous operation type (DNEG) instruction.
Operation error
There is no operation error.
Word
T, ST, C, D, W, U\G
SD, SW, R
 
∙∙∙
1 1 1 1 0 1
0 0 0 0 0 0
1 1 1 1 0 1
∙∙∙
0 0 0 0 1 0
Structured text
ENO:=DNEG(EN,d);
ENO:=DNEGP(EN,d);
Range Data type
-2147483648 to +2147483647 32-bit signed binary

Bit

Bit
Double word Indirect
specification
Z LC LZ
   
b0
∙∙∙ -218460
0 0 1 0 0
0 0 0 0 0
0 0 1 0 0
b0
1 1 1 0 0 ∙∙∙ 218460
Data type (label)
ANY32
BOOL
BOOL
Constant Others
K, H E $
   
7 BASIC INSTRUCTIONS
7.5 Data Conversion Instructions
7
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