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2 Instructions
2-100
CP1E CPU Unit Instructions Reference Manual(W483)
Precautions
• When CPS(114)/CPSL(115) 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)/CPSL(115), as shown in the following diagram.
• Do not program another instruction between CPS(114)/CPSL(115) and the instruction controlled by
the Arithmetic Flag because the other instruction might change the status of the Arithmetic Flag.
• The immediate-refreshing variation (!CPS(114)/!CPSL(115)) can be used with words allocated to
CPU Unit built-in inputs specified in S
1
and/or S
2
. When !CPS(114)/!CPSL(115) is executed, input
refreshing will be performed for the external input word specified in S
1
and/or S
2
and that refreshed
value will be compared.
Sample program
When CIO 0.00 is ON in the following example, the eight-digit signed binary data in D2 and D1 is com-
pared to the eight-digit signed binary data in D6 and D5 and the result is output to the Arithmetic Flags.
• If the content of D2 and D1 is greater than that of D6 and D5, the Greater Than Flag will be turned
ON, causing CIO 20.00 to be turned ON.
• If the content of D2 and D1 is equal to that of D6 and D5, the Equals Flag will be turned ON, causing
CIO 20.01 to be turned ON.
• If the content of D2 and D1 is less than that of D6 and D5, the Less Than Flag will be turned ON,
causing CIO 20.02 to be turned ON.
i
CPS/CPSL
S1
S2
A
Arithmetic Flag
(Example: Equal Flag)
In this case, the Equals Flag and output A will be turned
ON when S
1
= S
2
or S
1
+1, S
1
= S
2
+1, S
2
.
CPS/CPSL
S1
S2
A
Instruction B
Arithmetic Flag
(Example: Equal Flag)
In this case, the results of instruction B might
change the results of CPS(114)/CPSL(115).
CPSL
D1
D5
20.00
0.00
>
20.01
=
20.02
<
D2
1234
D1
5678
> ON (1)
= OFF (0)
< OFF (0)
D6
ABCD
D5
EF12
Result
Comparison
Flag status