Omron CPM1 Programming Manual

283
Conversion Instructions Section 5-19
Example The following example shows how to use NEG(––) to find the 2’s complement
of the content of DM 0005 and output the result to IR 105.
5-19-18DOUBLE 2’S COMPLEMENT – NEGL(––)
Limitations This instruction is available in the CQM1-CPU4@-E/-EV1 only.
DM 6143 to DM 6655 cannot be used for R.
S and S+1 must be in the same data area, as must R and R+1.
Description Converts the eight-digit hexadecimal content of the source words (S and S+1)
to its 2’s complement and outputs the result to the result words (R and R+1).
This operation is effectively the same as subtracting the eight-digit content S
and S+1 from $0000 0000 and outputting the result to R and R+1; it will calcu-
late the absolute value of negative signed binary data.
If the content of S is 0000 0000, the content of R will also be 0000 0000 after
execution and EQ (SR 25506) will be turned on.
If the content of S is 8000 0000, the content of R will also be 8000 0000 after
execution and UF (SR 25405) will be turned on.
Note Refer to 1-10 Calculating with Signed Binary Data for more details.
Flags ER: 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 content of R+1, R is zero after execution; otherwise
OFF.
UF: ON when the content of S+1, S is 8000 0000; otherwise OFF.
00000 LD 00100
00001 NEG(––)
DM 0005
105
000
Address Instruction Operands
NEG(––)
DM 0005
105
000
00100
#0000
#001F
#FFE1
–
Output to IR 105.
Content of DM 0005.
S: First source word
IR, SR, AR, DM, HR, TC, LR
Ladder Symbols Operand Data Areas
R: First result word
IR, SR, AR, DM, HR, LR
NEGL(––)
S
R
000
@NEGL(––)
S
R
000
000
Not used. Set to 000.

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)