Справочник Пользователя для Omron C200HE

The following example shows a four-digit addition with CY used to place either
#0000 or #0001 into R+1 to ensure that any carry is preserved.

CLC(41)

00000

ADB(50)

010

DM 0100

HR 10

MOV(21)

#0000

HR 11

MOV(21)

#0001

HR 11

TR 0

25504

25504

= R

= R+1

= R+1

00000

LD

00000

00001

OUT

TR

0

00002

CLC(41)

00003

ADB(50)

010

DM

0100

HR

10

00004

AND NOT

25504

00005

MOV(21)

#

0000

HR

11

00006

LD

TR

0

00007

AND

25504

00008

MOV(21)

#

00001

HR

11

In the case below, A6E2 + 80C5 = 127A7. The result is a 5-digit number, so CY
(SR 25504) = 1, and the content of R + 1 becomes #0001.

R+1: HR 11

R: HR 10

0

0

0

1

2

7

A

7

Au: IR 010

A

6

E

2

Ad: DM 0100

8

0

C

5

Note The UF and OF flags would also be turned ON during this addition, but they can

be ignored since they are relevant only in the addition of signed binary data.

In the following example, ADB(50) is used to add two 16-bit signed binary val-
ues. (The 2’s complement is used to express negative values.)

The effective range for 16-bit signed binary values is –32,768 (8000) to +32,768
(7FFF). The overflow flag (OF: SR 25404) is turned ON if the result exceeds
+32,767 (7FFF) and the underflow flag (UF: SR 25405) is turned ON if the result
falls below –32,768 (8000).

CLC(41)

00000

ADB(50)

LR 20

DM 0010

DM 0020

00000

LD

00000

00001

CLC(41)

00002

ADB(50)

LR

20

DM

0010

DM

0020