Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 259

Comparison Instructions
Description
Note
226
Area
Constants
Data Registers
Index Registers
Indirect addressing using
Index Registers
CPS(114) compares the signed binary data in S
result to Arithmetic Flags (the Greater Than, Greater Than or Equal, Equal,
Less Than or Equal, Less Than, and Not Equal Flags) in the Auxiliary Area.
Signed binary
comparison
Arithmetic Flags
(>, >=, =, <=, <, <>)
CPS(114) treats the data in S
from 8000 to 7FFF ( 32,768 to 32,767 decimal).
–
Arithmetic Flag Status
The following table shows the status of the Arithmetic Flags after execution of
CPS(114). (A status of "---" indicates that the Flag may be ON or OFF.)
CPS(114)
Result
>
S > S ON ON
1 2
S = S OFF ON
1 2
S < S OFF OFF
1 2
Using CPS(114) Results in the Program
When CPS(114) is executed, the result is reflected in the Arithmetic Flags.
Control the desired output or right-hand instruction with a branch from the
same input condition that controls CPS(114), as shown in the following dia-
gram. In this case, the Equals Flag and output A will be turned ON when S
S .
2
Correct Use of CPS(114)
Arithmetic Flag
(Example: Equal Flag)
S
1
#0000 to #FFFF (binary)
32768 to 0 to 32767 (signed decimal)
DR0 to DR15
---
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
and S as signed binary data which ranges
1 2
Flag status
> = = < =
OFF OFF
ON ON
OFF ON
CPS
S1
S2
A
Section 3-6
S
2
and S and outputs the
1 2
< < >
OFF ON
OFF OFF
ON ON
1
=