User manual

104 Publication 1756-RM093F-EN-P - January 2010
Glossary
Online
Situation where you are monitoring/modifying the program in the
controller.
Overlap
When a task (periodic or event) is triggered while the task is still
executing from the previous trigger.
Partnership
The primary controller and safety partner must both be present, and
the hardware and firmware must be compatible for partnership to be
established.
Pending Edit
A change to a routine that has been made in RSLogix 5000 software,
but has not yet been communicated to the controller by accepting the
edit.
Periodic Task
A task that is triggered by the operating system at a repetitive period
of time. Whenever the time expires, the task is triggered and its
programs are executed. Data and outputs established by the programs
in the task retain their values until the next execution of the task or
until they are manipulated by another task. Periodic tasks always
interrupt the continuous task.
Primary Controller
The processor in a dual-processor controller that performs standard
controller functionality and communicates with the safety partner to
perform safety-related functions.
Recoverable Fault
A fault, which when properly handled by implementing the fault
handling mechanisms provided by the controller, does not force user
logic execution to be terminated.
Requested Packet Interval (RPI)
When communicating over a network, this is the maximum amount of
time between subsequent production of input data.