Omron NJ Series - Page 270

6-83
6 Programming
NJ-series CPU Unit Software User’s Manual (W501)
6-5 Programming Languages
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6-5-3 Structured Text Language
Precautions for Correct UsePrecautions for Correct Use
The intended operation may not occur if a function is nested under itself. Always separate the
functions into different statements as shown below.
Example of incorrect notation: out := MyFunc( In1:=x1, In2:=MyFunc( In1:=x2, In2:=x3 ) );
Example of correct notation: temp := MyFunc( In1:=x2, In2:=x3 );
out := MyFunc( In1:=x1, In2:=temp );
Addition + 100+200
Value: 300
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Subtraction  100-200
Value: 100
Comparison <, >, <=, >= 100<200
If the comparison result is TRUE, the value is set to TRUE.
Otherwise, the value is set to FALSE. In the above exam-
ple, 100 is less than 200, so the value is TRUE.
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Matches = 100=200
If the two values match, the value is set to TRUE. Other-
wise, the value is set to FALSE. In the above example, 100
does not equal 200, so the value is FALSE.
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Does not match < > 100<>200
If the two values do not match, the value is set to TRUE.
Otherwise, the value is set to FALSE. In the above exam-
ple, 100 does not equal 200, so the value is TRUE.
Logical AND AND,& Applies 1-bit AND logic to all bits.
The results of 1-bit AND logic are as follows:
0 AND 0 = 0
0 AND 1 = 0
1 AND 0 = 0
1 AND 1 = 1
0101 AND 1100
Value: 0100
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Logical exclusive
OR
XOR Applies 1-bit exclusive OR logic to all bits.
The results of 1-bit exclusive OR logic are as follows:
0 XOR 0 = 0
0 XOR 1 = 1
1 XOR 0 = 1
1 XOR 1 = 0
0101 XOR 1100
Value: 1001
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Logical OR OR Applies 1-bit OR logic to all bits.
The results of 1-bit OR logic are as follows:
0 OR 0 = 0
0 OR 1 = 1
1 OR 0 = 1
1 OR 1 = 1
0101 OR 1100
Value: 1101
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Operation Operator Notation example and evaluated value Priority