Specifications

Glossary
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EIO0000000051 6/2010
role name
A customer-driven, unique logical personal identifier for an Ethernet NIM. A role
name (or device name) is created when you:
z combine the numeric rotary switch setting with the NIM (for example,
STBNIP2212_010), or . . .
z edit the Device Name setting in the NIM's embedded web server pages
After the NIM is configured with a valid role name, the DHCP server uses it to identify
the island at power up.
RSTP
(rapid spanning tree protocol). Allows a network design to include spare (redundant)
links that provide automatic backup paths when an active link fails, without the
danger of loops or the need for manual enabling/disabling of backup links. Loops
must be avoided because they result in flooding the network.
RTD
resistive temperature detect. An RTD device is a temperature transducer composed
of conductive wire elements typically made of platinum, nickel, copper, or nickel-
iron. An RTD device provides a variable resistance across a specified temperature
range.
RTP
run-time parameters. RTP lets you monitor and modify selected I/O parameters and
Island bus status registers of the NIM while the Advantys STB Island is running. The
RTP feature uses 5 reserved output words in the NIM’s process image (the RTP
request block) to send requests, and 4 reserved input words in the NIM’s process
image (the RTP response block) to receive responses. Available only in standard
NIMs running firmware version 2.0 or higher.
Rx
reception. For example, in a CAN-based network, a PDO is described as an RxPDO
of the device that receives it.
S
SAP
service access point. The point at which the services of 1 communications layer, as
defined by the ISO OSI reference model, is made available to the next layer.