Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual - Manual (Page 283)

Rockwell Automation Publication 1752-UM001E-EN-P - June 2014 283
Glossary
The following terms and abbreviations are used throughout this manual. For
definitions of terms not listed here, refer to the Allen-Bradley Industrial
Automation Glossary, publication AG-7.1.
assembly Internal data in a device gathered as one group to be accessed externally.
busoff Status that occurs when the error rate is extremely high over a communication
cable. An error is detected when the internal error counter exceeds a threshold
value.
change of state (COS) A type of standard I/O communication in which the controller can send and
receive data with slave devices whenever a data change occurs in the configured
slave device or controller. Data is updated at the rate of the heartbeat.
common industrial protocol (CIP) A communication protocol designed for industrial automation applications.
configuration signature The combination of an ID number, date, and time that uniquely identifies a
specific configuration for a device.
cyclic A type of standard I/O data communication in which the controller can send and
receive data with slave devices that support the cyclic feature. Data is only sent at
the user-specified rate.
discrepancy time The time period from a change in one or two inputs until the other input
changes.
Dual Channel The use of two inputs or outputs as the input or output for redundancy.
Dual Channel Complementary A setting to evaluate whether two logic states are complementary.
Dual Channel Equivalent A setting to evaluate whether two logic states are equivalent.
electronic data sheet (EDS) A vendor-supplied template that RSNetWorx for DeviceNet software uses to
display the configuration parameters, I/O data profile, and connection type
support for a given DeviceNet or DeviceNet Safety module.
error latch time The time period to hold an error state (including the related control data, status
data, and status indications).
explicit messaging A type of messaging used for lower priority tasks, such as configuration and status
monitoring.
node Hardware that is assigned a single address on the network (also referred to as
device or module).
one out of two (1oo2) Refers to the behavioral design of a multi-processor safety system.
personal computer (PC) Computer used to interface with a control system via programming software.