Rockwell-automation GMLC Reference Manual Bedienungsanleitung Seite 438

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Seitenansicht 437
Publication GMLC-5.2 - November 1999
Chapter
20
Calculation Blocks
Calculation blocks perform mathematical and logical calculations to
define variable values, evaluate expressions, etc. Blocks for writing
equations, evaluating mathematical or logical expressions, and building
tables of values are included in this section.
The following table presents the icons for each block in this category
along with a brief description. More detailed descriptions of the blocks
are contained on the pages following this table.
Use this block: To:
Assign a value to:
a user variable
an indirect variable
certain system variables
a discrete output
an output group
a CNET local variable
a DH-485 local or remote variable
a cam profile point
an SLC variable
an SLC indirect variable.
Evaluate a mathematical expression and make a logical decision
based on the expression’s value.
Pause execution of a task or program until the value of a
mathematical expression meets a specified criteria.
Use the Build Table block to build time and position cam profiles, and
arrays of user variables.
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