Rockwell Automation 6008-SV2R VMEbus remote I/O Scanner - Manual (Page 93)

Chapter
Operating in SVĆSuperset Mode
6
6Ć12
The VME master processor writes 10 (hex) to the command byte. There
are no input parameters from the VME master processor. The scanner
writes these parameters to the selected channel’s general data area:
Byte
offset:
Parameter: Description:
021F scan list length
READ ONLY The scan list length indicates the number of entries in the scan
list. The scan list length is an 8Ćbit quantity that the scanner
writes to the length of data byte in the control/status area. You
can enter a scan list length of 0.
0220 I/O adapter status word block
READ ONLY This word block contains four 16Ćbit entries (4 words) for each
adapter - 16 bits for each starting group per adapter (maximum
of 16 groups of entries). See Figure 6.3 and Figure 6.4.
02A0 scan list
READ ONLY This list is a maximum of 32 bytes long (1 byte per adapter).
The list contains one byteĆsized entry for each adapter found
on the I/O link. See Figure 6.5 on page 6Ć14.
Figure 6.3
Format of the I/O adapter status word block and scan list
Each block represents 1 word. Only those
words representing starting groups of
existing racks should contain the data
described in Figure 6.4.
rack 0, starting group 0
rack 0, starting group 2
rack 0, starting group 4
rack 0, starting group 6
rack 1, starting group 0
rack 1, starting group 2
rack 15, starting group 4
●
● ●
●
rack 15, starting group 6
up to as many
as 32 bytes
rack 0, staring group 2 rack 1, starting group 2
●
● ●
●
02A0
02A2
02A4
02A6
02A1
02A3
02A5
02A7
rack 2, staring group 2 rack 3, starting group 0
rack 4, staring group 0 rack 5 starting group 2
rack 6, staring group 0 rack 7, starting group 4
0221
0223
0225
0227
0229
022B
029D
029F
0220
0222
0224
0226
0228
022A
029C
029E
Byte
offset
Byte
offset
channel A
adapter status words
channel A
example scan list
Each block represents 1 byte.
See Figure 6.5.
parameters