4–4 Scanner Configuration and Programming
Publication
17476.6 - July 1996
Word 3, Complementary Logical Device Address – specifies the
logical starting address of each complementary RIO link device.
The logical address consists of the logical rack number (8, 9, 10, or
11 because a complementary device is always 8 above its primary)
and starting logical group (0, 2, 4, or 6). Each bit in this word
represents a logical address. To specify an address you place a 1 at
the bit corresponding to the starting logical address of each logical
device.
Word 4, Complementary Device Logical Image Size – specifies
the logical image size (amount of scanner I/O image) of the
complementary devices set in word 3. As with word 3, these bits
correspond to RIO logical rack and logical group numbers. To
specify image size you place a 1 at each group a device occupies.
Important: Setting device addresses in word 3 of the G file
configures the system to operate in the complementary
I/O mode. Not setting device addresses in word 3
causes the system to operate only in the primary/normal
mode. If you wish to operate in the complementary
mode and you only have primary devices configured,
word 3 of the G file must be set to a decimal “1,” and
word 4 of the G file must be equal to zero.
1
0
1
0123456789101112131415
0000010000000100
1000000
1000
100
100
1
1
1
1
1
1
100
1
1
1
Bit Number
024602460246
RIO Logical Rack 3
Starting Logical Group
0246
I/O Mix, Word 0
Primary/Normal Logical Device Address,
Word 1
Primary/Normal Logical Image Size,
Word 2
G
File
Contains scanner
information for the SLC.
Your programming device
automatically sets the
scanner information.
Specifies the RIO
starting addresses of
primary/normal logical
devices.
Specifies the logical
image size assigned to
primary/normal logical
devices set in Word 1.
RIO Rack 0
Image Size
0246
RIO Rack 1
Image Size
0246
RIO Rack 2
Image Size
0246
RIO Rack 3
Image Size
0246
Full Logical Rack Device
Half Logical Rack Device
Three Quarter Logical Rack Device
Quarter Logical Rack Devices
RIO Logical Rack 2
Starting Logical Group
RIO Logical Rack 1
Starting Logical Group
RIO Logical Rack 0
Starting Logical Group
1
100
10000
1000
100
100
1
1
1
1
10
1
100
1
1
1
024602460246
RIO Logical Rack 11
Starting Logical Group
0246
Complementary Logical Device Address,
Word 3
Complementary Logical Image Size,
Word 4
RIO Rack 8
Image Size
0246
RIO Rack 9
Image Size
0246
RIO Rack 10
Image Size
0246
RIO Rack 1
1
Image Size
0246
RIO Logical Rack 10
Starting Logical Group
RIO Logical Rack 9
Starting Logical Group
RIO Logical Rack 8
Starting Logical Group
Specifies the RIO
starting addresses of
complementary logical
devices.
Specifies the logical
image size assigned to
complementary logical
devices set in Word 3.
Note: A complementary logical rack is always
numbered 8 above its primary logical rack. Also, logical
racks 8, 9, 10, and 11 are sometimes referred to as
complementary logical racks 0, 1, 2, and 3.
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