Common Information For All Instructions; Conventions And Related Terms - Allen-Bradley Logix5000 Reference Manual

Preface
Table 1 - Description of Instruction Format
Section
Fault conditions
Execution
Example
Common Information for
All Instructions
Conventions and
Related Terms
38
Information
Defines whether or not the instruction generates minor or major faults. If so, defines the fault type and
code.
Defines the specifics of how the instruction operates.
Provides at least one programming example in each available programming language.
Includes a description explaining each example.
The following icons help identify language-specific information.
Icon
The Logix5000 instruction set has some common attributes.
Information
Common attributes
Function block attributes
This manual uses set and clear to define the status of bits (Boolean) and
values (non-Boolean).
Term
Set
Clear
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Programming Language
Relay ladder
Structured text
Function block
Appendix
Common Attributes defines:
• Arithmetic status flags
• Data types
• Keywords
Function Block Attributes defines:
• Program and operator control
• Timing modes
Means
The bit is set to 1 (ON).
A value is set to any non-zero number.
The bit is cleared to 0 (OFF).
All the bits in a value are cleared to 0.