Delta CT2000 Series User Manual page 499

Chapter 16 PLC Function CT2000 Series
API
ADD
D
20
Bit device
X Y M
S1
＊
S2 ＊
D
Notes on operand usage: none

 Using two data sources: The result of adding
method will be stored in
 The highest bit of any data is symbolized as bit 0 indicating (positive) 1 indicating
(negative), enabling the use of algebraic addition operations. (for instance:
3+(-9)=-6)
 Flag changes connected with the addition.
1. When calculation results are 0, the zero flag M1020 will be On.
2. When calculation results are less than –32,768, the borrow flag M1021 will be
3. When calculation results are greater than 32,767, the carry flag M1022 will be
6. 16-bit BIN addition: When X0=On, the result of the content of addend D0 plus the
content of augend D10 will exist in the content of D20.
7. Relationship between flag actions and negative/positive numbers:
S1 S2 D
P
Word device
K H KnX KnY KnM
＊ ＊ ＊ ＊
＊ ＊ ＊ ＊
＊ ＊
S1 S2
: Augend. : Addend.
On.
On.
X0
ADD
16 bit: Zero flag
-2, -1, 0 -32,768
The highest bit
Borrow flag
of the data
= 1 (negative)
32 bit: Zero flag
-2, -1, 0 -2,147,483,648
The highest bit
Borrow flag
of the data
= 1 (negative)
BIN addition
16-bit command (7 STEP)
ADD
T C D
＊ ＊ ＊
＊ ＊ ＊
32-bit command (13 STEP)
＊ ＊ ＊
DADD
Flag signal: M1020 Zero flag
D
: Sum.
D
.
D0 D10 D20
Zero flag
-1, 0 1
The highest bit
of the data
= 0 (positive)
Zero flag
-1, 0 1
The highest bit
of the data
= 0 (positive)
16-58
Continuous ADDP
execution type execution type
Continuous DADDP
execution type execution type
M1021 Borrow flag
M1022 Carry flag
Please refer to the following
supplementary explanation
S1 S2
and using the BIN
Zero flag
32,767 0 1 2
Carry flag
Zero flag
2,147,483,647 0 1 2
Carry flag
Pulse
Pulse