Omron C200HE ユーザーズマニュアル

Au and/or Ad is not BCD.

Indirectly addressed DM word is non-existent. (Content of 

DM word is

not BCD, or the DM area boundary has been exceeded.)

CY: 

ON when there is a carry in the result.

EQ:

ON when the result is 0.

When 00000 is ON, the following program adds two 12-digit numbers, the first
contained in LR 20 through LR 22 and the second in DM 0012. The result is
placed in LR 10 through HR 13. In the second addition (using ADD(30)), any
carry from the first addition is included. The carry from the second addition is
placed in HR 13 by using @ADB(50) (see 5-20-1 BINARY ADD – ADB(50)) with
two all-zero constants to indirectly place the content of CY into HR 13.

@ADDL(54)

LR 20

DM 0010

HR 10

CLC(41)

00000

@ADD(30)

LR 22

DM 0012

HR 12

@ADB(50)

#0000

#0000

HR 13

00000

LD

00000

00001

CLC(41)

00002

@ADDL(54)

LR

20

DM

0010

HR

10

00003

@ADD(30)

LR

22

DM

0012

HR

12

00004

@ADB(50)

#

0000

#

0000

HR

13

Mi: Minuend word (BCD)

IR, SR, AR, DM, HR, TC, LR, #

Su: Subtrahend word (BCD)

IR, SR, AR, DM, HR, TC, LR, #

R: Result word

IR, SR, AR, DM, HR, LR

SUB(31)

Mi

Su

R

@SUB(31)

Mi

Su

R

When the execution condition is OFF, SUB(31) is not executed. When the
execution condition is ON, SUB(31) subtracts the contents of Su and CY from
Mi, and places the result in R. If the result is negative, CY is set and the 10’s com-
plement of the actual result is placed in R. To convert the 10’s complement to the
true result, subtract the content of R from zero (see example below).

Mi – Su – CY

CY

R

Note The 2’s COMPLEMENT – NEG(––) instruction can be used to convert binary

data only, it cannot be used with BCD data.