Omron CPM1 Programming Manual

320
Increment/Decrement Instructions Section 5-24
DEC(39) works the same way as INC(38) except that it decrements the value
instead of incrementing it.
Precautions 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.
Flags ER: Wd 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.)
EQ: ON when the decremented result is 0.

Omron CPM1 Specifications

General

Model	CPM1
Manufacturer	Omron
Instruction Set	Basic and advanced instructions
Power Supply	100 to 240 VAC or 24 VDC
Communication	RS-232C
I/O Points	10, 20, 30, or 40 points depending on the model
Timers	Yes, multiple timers available
Counters	Yes, multiple counters available
Input Voltage	24V DC
Output Type	Relay or transistor
Number of I/O Points	10, 20, 30, 40
Communication Ports	RS-232C (optional)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C
Humidity	10% to 90% (non-condensing)
Dimensions	Varies depending on the model
Weight	Varies depending on the model
Program Memory	2048 steps (2K steps)