Increment/Decrement Instructions; Bcd Increment - Inc(38); Bcd Decrement - Dec(39) - Omron CQM1H - PROGRAM Programming Manual

Increment/Decrement Instructions

5-26 Increment/Decrement Instructions

5-26-1 BCD INCREMENT – INC(38)
Limitations
Description
Precautions
Flags
5-26-2 BCD DECREMENT – DEC(39)
Limitations
Description
Precautions
Flags
376
Ladder Symbols
INC(38) @INC(38)
Wd
DM 6144 to DM 6655 cannot be used for Wd.
When the execution condition is OFF, INC(38) is not executed. When the exe-
cution condition is ON, INC(38) increments Wd, without affecting Carry (CY).
The content of Wd will be incremented every cycle if the undifferentiated form
of INC(38) is used. Use the differentiated form (@INC(38)) or combine
INC(38) with DIFU(13) or DIFD(14) to increment Wd just once.
ER: Wd is not BCD
Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
EQ: ON when the incremented result is 0.
Ladder Symbols
DEC(39) @DEC(39)
Wd
DM 6144 to DM 6655 cannot be used for Wd.
When the execution condition is OFF, DEC(39) is not executed. When the
execution condition is ON, DEC(39) decrements Wd, without affecting CY.
DEC(39) works the same way as INC(38) except that it decrements the value
instead of incrementing it.
The content of Wd will be decremented every cycle if the undifferentiated form
of DEC(39) is used. Use the differentiated form (@DEC(39)) or combine
DEC(39) with DIFU(13) or DIFD(14) to decrement Wd just once.
ER: Wd is not BCD.
Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
EQ: ON when the decremented result is 0.
Wd: Increment word (BCD)
IR, SR, AR, DM, EM, HR, LR
Wd
Wd: Decrement word (BCD)
IR, SR, AR, DM, EM, HR, LR
Wd
Section 5-26
Operand Data Areas
Operand Data Areas