Publication 1752-UM001A-EN-P - October 2006
Glossary 232
electronic data sheet (EDS)
A vendor-supplied template that RSNetWorx for DeviceNet 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 LED 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).
polled
A type of standard I/O data communication in which a polled
message solicits a response from a single, specified device on the
network (a point-to-point transfer of data).
safety I/O
Safety I/O has most of the attributes of standard I/O except it features
mechanisms certified to SIL 3 to verify data integrity and timeliness.
safety network number (SNN)
Uniquely identifies a network across all networks in the safety system.
The end user is responsible for assigning a unique number for each
safety network or safety subnet within a system. The safety network
number makes up part of the unique node identifier (UNID).
strobed
A type of standard I/O data communication in which a message
solicits a response from each strobed device (a multi-cast transfer). It
is a 64 bit message that contains 1 bit for each slave device on the
network.
Each slave node can return a maximum of 8 bytes in response to the
master’s strobe.
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