Logical Device Image Size Status; Active Device Status - Allen-Bradley 1747-SN User Manual

4–24 Scanner Configuration and Programming
Bit Number (decimal)
Primary Logical Device Image Size, Word 9
Primary Logical Device Image Size, Word 2
Bit Number (decimal)
Complementary Logical Device Image Size, Word 4
Complementary Logical Device Image Size, Word 4
Publication 1747 6.6 - July 1996

Logical Device Image Size Status

Word 9 – provides status/feedback of the logical device image size
you configure in word 2 of the G file (primary/normal devices). A
bit set to 1 shows the logical image size of each logical device.
Writing to word M1 file word 9 will not alter the contents of the G
file.
M1 (Status) File - Word 9
15 14 13 12 11
1 1 1 0 0
G File - Word 2
RIO Rack 3
Image Size
6 4 2 0 6
1 1 1 0 0
Word 4 – provides status/feedback of the logical device image size
you configure in word 4 of the G file (complementary devices). A
bit set to 1 shows the logical image size of each logical device.
Writing to word M1 file word 4 will not alter the contents of the G
file.
M1 (Status) File - Word 4
15 14 13 12
1 1 1
G File - Word 4
RIO Rack 11
Image Size
6 4 2
1 1 1

Active Device Status

Word 10 – provides active device status for primary/normal devices.
When a RIO device is communicating with the scanner the bit
corresponding to the device's logical starting group is set to 1.
Devices that are inhibited in the M0 file (M0:e.8 – M0:e.11) are
represented by a 0. Unless devices are inhibited, not responding to
communications, or configured to an incorrect logical rack size, this
word is identical to the device configuration (M1:e.8).
10 9 8 7 6 5
1 1 0 1 1
RIO Rack 2 RIO Rack 1
Image Size Image Size
4 2 0 6 4 2
1 1 0 1 1
11 10 9 8 7 6
0 0 1 1 0 1
RIO Rack 10 RIO Rack 9
Image Size Image Size
0 6 4 2 0 6
0 0 1 1 0 1
4 3 2 1 0
1 1 1 0 0 1
RIO Rack 0
Image Size
0 6 4 2 0
1 1 1 0 0 1
5 4 3 2 1
1 1 1 1 0 0
RIO Rack 8
Image Size
4 2 0 6 4 2
1 1 1 1 0 0
M1 File
M1:e.9
0
M1 File
1
M1:e.4
0
1