Allen-Bradley 1756-L61 ControlLogix 5561 Programming Manual page 55

Organizing Tags Chapter 2
Table 7 - Format Expressions
If the operator requires
One value (tag or expression)
Two values (tags, constants, or expressions)
You can use these operators to specify the subscript of an array.
Operator Description
+ Add
- Subtract/negate
* Multiply
/ Divide
ABS Absolute value
AND AND
FRD BCD to integer
Format your expressions as follows.
Use this format
operator(value)
value_a operator value_b
Rockwell Automation Publication 1756-PM004D-EN-P - September 2012
Operator Description
MOD Modulo
NOT Complement
OR OR
SQR Square root
TOD Integer to BCD
TRN Truncate
XOR Exclusive OR
Example
ABS(tag_a)
·tag_b + 5
·tag_c AND tag_d
·(tag_e ** 2) MOD (tag_f / tag_g)
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