Rockwell Automation 6008-SV2R VMEbus remote I/O Scanner - Manual (Page 52)

5 Chapter
5Ć1
Operating in SVĆCompatible Mode
The SV-compatible mode supports these features:
each channel supports as many as 8 logical racks (16 physical adapters)
the global data area is 1872 words long
using the SETUP command, you can enable or disable the
VME-master-processor watchdog timer; change the timeout interval of
the watchdog timer; select the command complete interrupt level and
status ID; select whether to monitor SYSFAIL conditions; and select a
communication rate of 57.6 or 115.2 kbps
Use this mode if you are replacing a 6008-SV scanner and want the
6008-SV1R or 6008SV2R scanner to operate exactly as the scanner you
are replacing. Your programs for the 6008-SV scanner work for the
6008-SV1R or 6008-SV2R scanner. However, you need to change any
reference in your application to the VME ID for the 6008-SV scanner to
the VME ID for the 6008-SV1R or 6008-SV2R scanner.
Important: The SCAN LIST command uses two bits to identify rack size.
These bits were not required for the 6008-SV. If you are migrating your
application from a 6008-SV to a 6008-SV1R or 6008-SV2R, make sure to
set these additional bits. See page 5-13.
This chapter describes the SV-compatible mode.
If you want to read about: Go to page:
addressing global RAM
5Ć1
command summary 5Ć6
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 5.1 shows the general
structure for the SV-compatible operating mode. Page 5-3 shows the
specifics of the structure for channel A.
Using This Chapter
Addressing Global RAM