12 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Preface
Terminology
Refer to this table for the meaning of common terms.
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Term Means
Connection Logical communication channel for communication between nodes. Connections are maintained and controlled between masters and slaves.
EDS Electronic data sheet, a template used in RSNetWorx software to display the configuration parameters, I/O data profile, and connection-type support for a
given I/O module. RSNetWorx software uses these simple text files to identify products and commission them on a network.
ODVA Open DeviceNet Vendor Association, a nonprofit association of vendors established for the promotion of CIP networks.
PFD Probability of failure on demand, the average probability of a system to fail to perform its design function on demand.
PFH Probability of failure per hour, the probability of a system to have a dangerous failure occur per hour.
Proof test Periodic test performed to detect failures in a safety-related system so that, if necessary, the system can be restored to an as-new condition or as close as
practical to this condition.
SNN Safety network number, which uniquely identifies a network across all networks in the safety system. You are responsible for assigning a unique number
for each safety network or safety sub-net within a system.
Standard Devices or portions of devices that do not participate in the safety function.
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