14Fnc20 (Add): Addition, Fnc21 (Sub): Subtraction - Mitsubishi FX2N-10GM Hardware / Programming Manual

FX Series Positioning Controllers
5.10.14 FNC20 (ADD): Addition, FNC21 (SUB): Subtraction
FNC 20
ADD
FNC 21
SUB
Word
devices
Applicable
devices
and basic
format
X30
FNC 20
ADD
FNC 20
[D] ADD
X31
FNC 21
SUB
FNC 21
[D] SUB
Flag operations
As shown in the table above, selection of the special auxiliary relays used as flags varies
depending on program type (for the X axis, for simultaneous 2-axis, for the Y axis and for sub-
tasks).
Addition/Subtraction
16-bit operation ADD
7 steps
SUB
S1· S2·
K,H KnX KnY
Drive
input
FNC
S1·
20ADD
Augend
Drive
input
FNC 21
S1·
SUB
Minuend
D 10 D 12 D 14
D 20 D 22 D 24
D 30 D 32 D 34
D 40 D 42 D 44
32-bit operation
11 steps
S1· S2·
Flags: Described below.
KnM D V,Z
D·
Zero
Borrow
Carry
S2· D·
•
S1·
Addend Result
A negative value is treated as two's complement.
•
S2· D·
S1·
A negative value is treated as two's complement.
Subtrahend Result
(D10) + (D12) → (D14)
16-bit operation
(D21, D20) + (D23, D22) → (D25, D24)
32-bit operation
(D30) - (D32) → (D34)
16-bit operation
(D41, D40) - (D43, D42) → (D45, D44)
32-bit operation
Program format 5
Applicable models
Series name
[S]ADD
FX
2N
[D]SUB
FX
2N
X axis,
Y axis
simultaneous
(Not 10GM)
2-axis
M9061 M9093
M9094
M9062
M9063
M9095
S2· D·
+ =
S2· D·
- =
Remarks
-10GM
-20GM
Subtask
M9133
M9134
M9135
5-56