Hitachi NJI-350B - Manual (Page 138)

Chapter 5 Instruction Specifications
5-88
Item number Application instructions-16 Name Two's complement (NEGATE)
Ladder format Condition code Processing time ( µs) Remark
R7F4 R7F3 R7F2 R7F1 R7F0 Average Maximum
NEG (d) DER ERR SD V C Upper case: W
z z z z z 22  Lower case: DW
Instruction format Number of steps
Condition Steps
NEG (d) 2 29 
Bit Word Double word
Usable I/O
X Y
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM C
o
nstant
Other
d I/O to take complement { { { {
Function
• Calculates two's complements of d (Reverses each bit contained in d and adds “1.” However, C (R7F0) remains
unchanged).
1 1 0 0 1 1 0 0 0 0 0 1 1 0 1 0
0 0 1 1 0 0 1 1 1 1 1 0 0 1 0 1
0 0 1 1 0 0 1 1 1 1 1 0 0 1 1 0
1
Before execution
After execution
+
Notes
• Use edge trigger as the startup condition for this instruction.
Program example
LD R000
AND DIF0
[
NEG WR0000
]
NEG (WR0000)
R000 DIF0
Program description
• When R000 rises, 2's complement of the content of WR0000 is obtained.
Example) If WR0000 is H1234, WR0000 = HEDCC after the instruction is executed;
WR0000 = H1234 when executed again
NE
G (d)