Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 243)

Glossary
Appendix B
BĆ7
Encoder
1) A rotary device which transmits position information.
2) A device which transmits a fixed number of pulses for each revolution.
ERR
See Error Message.
Error Message (ERR)
The response to an opcode the industrial terminal cannot interpret.
Execution
The performance of a specific operation that is accomplished through
processing one instruction, a series of instructions, or a complete program.
Execution Time
The total time required for the execution of one specific operation.
False
Any malfunction which interferes with normal application operation.
Fault Zone
An area in the program which alters the operation portion of the application if a
rack fault occurs. Each fault zone is delimited by fence codes.
Fence Codes
Special program instructions which control and delimit specific program areas
such as fault zones.
File
1) One or more data table words used to store related data. See File
Organization. 2) A collection of related records treated as a unit. The records
are organized or ordered on the basis of some common factor called a key.
Records may be fixed or vary in length and can be stored in different devices
and storage media.
File Address
The data table address of a file that determines to where, or from where, data
will be transferred or moved.
File Creation
Establishing or writing records for a file into some storage device to provide
later access by the processor or operator.
File Maintenance
1) Adding, deleting, or changing the contents of records in a file.
2) Reorganizing the structure of a file to improve access to records or to change
the storage space required.