Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 193)

3 Publication 1747-UM010B-EN-P - September 2003
Glossary
The following terms are used throughout this manual. Refer to the
Allen-Bradley Industrial Automation Glossary, Publication Number
AG-7.1, for a complete guide to Allen-Bradley technical terms.
Adapter
Any physical device that is a slave on the RIO link.
Adapter Image
That portion of the scanner image assigned to an individual adapter.
ASB Module
The Catalog Number 1747-ASB, 1771-ASB, or 1794-ASB Remote I/O
Adapter Module. The ASB module is an adapter.
ASB Module Chassis
The chassis directly controlled by the ASB module. This includes the
remote chassis and (if installed) two remote expansion chassis when
using the 1747-ASB.
Block Transfer (BT)
See RIO Block Transfer.
Block Transfer Read (BTR)
A form of block transfer that occurs when a remote device transfers
data to the SLC processor.
Block Transfer Write (BTW)
A form of block transfer that occurs when the SLC processor transfers
data to a remote device.
Complementary I/O
Functionality that allows you to maximize I/O usage by pairing up I/O
data from a primary and complementary chassis.
Discrete I/O
An input or output device that has corresponding bit locations in the
scanner’s input or output file.
Discrete I/O Module
An I/O module used to sense or control two–state (ON/OFF) devices.