Subtraction (Fun12) - FATEK FBS Series Manual

FUN 12 D P
（−）
(Performs subtraction of the data specified at Sa and Sb and stores the result in D)
Symbol
WX
Range
WX0
Ope-
∣
rand
WX240
Sa
○
Sb
○
D
Description
● Performs the subtraction of the data specified at Sa and Sb and writes the results to a specified register D
when the subtract control input "EN" =1 or "EN↑" (
equal to 0 then set FO0 to 1. If carry occurs (subtracting a negative number from a positive number and the
result exceeds 32767 or 2147483647), then set FO1 to 1. If borrow occurs (subtracting a positive number
from a negative number and the resulted difference is less than -32768 or -2147483648), then set FO2 to 1.
All the FO statuses are retained until this instruction is executed again and overwritten by a new result.
Example
16-bit subtraction
Ladder Diagram
12P.(-)
X0
Sa :
EN
Sb :
D :
U/S
WY WM WS TMR CTR
WY0 WM0 WS0 T0
∣ ∣ ∣ ∣
WY240 WM1896 WS984 T255
○ ○ ○ ○
○ ○ ○ ○
○ ○ ○ ○
R
D=0
0
1
R
Y2
R 2
CY
BR
Sa R0
Sb R1 32767
D R2
Y2＝1 （borrow 1 represents－32768） Please refer to section 6.5
SUBTRACTION
HR IR OR
C0 R0 R3840 R3904
∣ ∣ ∣ ∣
C255 R3839 R3903 R3967
○ ○ ○ ○
○ ○ ○ ○
○ ○ ○
P
instruction) from 0 to 1. If the result of subtraction is
Key Operations
ORG
OUT
－5
R0－R1＝－32772
X0＝1
－32768－4＝－32772
－4
6-27
Basic Function Instruction
Operand
Sa: Minuend
Sb: Subtrahend
D : Destination register to store the
results of the subtraction
Sa, Sb, D may combine with V, Z, P0~P9
to serve indirect addressing
SR ROR DR K
R3968 R5000 D0
16/32-bit
∣ ∣ ∣
+/− number
R4167 R8071 D4095
○ ○ ○ ○
○ ○ ○ ○
○* ○* ○
Mnemonic Codes
ORG
FUN
Sa： R
Sb： R
D：
FO
OUT
FUN 12 D P
（−）
XR
V、Z
P0~P9
○
○
○
X 0
12
0
1
R 2
2
Y 2