Rockwell Automation 6008-SV2R VMEbus remote I/O Scanner - Manual (Page 9)

1 Chapter
1Ć1
Scanner Overview
This chapter provides an overview of the scanner. This chapter describes
how the scanner relates to the VMEbus and to the remote I/O link.
If you want to read about: go to page:
introduction
1Ć1
VMEbus relationship 1Ć4
how the scanner scans 1Ć6
operating modes 1Ć9
VME master processor watchdog timer 1Ć11
The VMEbus scanners (catalog number 6008-SV1R and 6008-SV2R)
monitor and control remote Allen-Bradley I/O modules without using a
PLC processor. Use your VME master processor(s) to manage as many as
32 racks of remote A-B I/O (16 per scanner channel).
The scanner communicates with I/O adapters that reside in the left slot of a
remote chassis and with other products that have node adapters built into
them. The scanner transfers the information necessary to control discrete
and block-transfer data to and from the VMEbus.
The VMEbus scanner physically resides in the VME chassis. The scanner
occupies one 6U (full-height) VME slot. The scanner uses the P1
connector to interface to the VMEbus. You can use more than one scanner
in your VME system to create large and flexible I/O subsystems.
To the VMEbus, the scanner is a memory-mapped slave that responds to
8-bit or 16-bit accesses in either A16 or A24 address space. The scanner
can act as a VME interrupter on any of the seven VMEbus interrupt lines.
The SV1R and SV2R scanners replace the Allen-Bradley 6008-SV
scanner. The SV1R has one remote I/O channel; the SV2R has two remote
I/O channels. The SV1R and SV2R scanners have an extra embedded
communication microprocessor, which gives them more flexibility and
faster performance than the 6008-SV scanner. The new scanners are
backward-compatible with the 6008-SV scanner and offer:
continuous block-transfer operations
each remote I/O channel supports as many as 16 racks of remote I/O
configurable scan rate at 57.6, 115.2, or 230.4 kbps
VME interrupt signals change in the scanner input table
Using This Chapter
Introduction