Rockwell Automation 6008-SV2R VMEbus remote I/O Scanner - Manual (Page 82)

6 Chapter
6Ć1
Operating in SVĆSuperset Mode
The SV-superset mode provides these features in addition to those
supported by the SV-compatible mode:
each channel supports as many as 16 logical racks per channel
(32 physical adapters); the SV-compatible mode supports as many as 8
logical racks per channel (16 physical adapters)
the global data area is 224 bytes long
you can configure the scanner to interrupt the VME master processor
when the scanner detects a change in a specified range of input image
table; the scanner also provides the offset for the first changed data
the scanner supports continuous block transfers and each channel has a
table for continuous block-transfer read data and a table for continuous
block-transfer write data
use the SETUP command to select a communication rate of 57.6, 115.2,
or 230.4 kbps
This chapter describes the SV-superset mode.
If you want to read about: go to page:
addressing global RAM
6Ć1
command summary 6Ć7
Both the VME master processor and the scanner can read and write to the
scanner’s VME global RAM. The global RAM structure depends on the
VME operating mode of the scanner. Figure 6.1 shows the general
structure for the SV-superset operating mode. Page 6-3 shows the
specifics of the structure for channel A.
Important: The scanner must be configured for A24 address space if you
use the SV-superset mode. For more information about configuring
address space, see chapter 2.
Using This Chapter
Addressing Global RAM