Flex I/O Module Output Mapping Scheme Example - Allen-Bradley DeviceNet 1756-DNB Configuration Manual

B–10 Scan List Example
1 The host application transfers
data to the output image table.
2 The FLEX I/O output message
is mapped from the output
image table area. A single bit
change detected at this point
causes a new output message
to be sent to the FLEX I/O
module.
Host Platform
Output Image File
Word 0 0000 0000 0000 0000
Word 1
0000 0000 0000 0000
Word 2
0000 0000 0000 0000
Word 3
0000 0000 0000 0000
Word 4
0000 0000 0000 0000
Word 5 0000 0000 0000 0000
Publication 1756–6.5.15 – July 1998

FLEX I/O Module Output Mapping Scheme Example

FLEX I/O Module Output Bytes
1794-ADN
adapter module
1
1794-IB16
input module
1 byte 1 byte
D = data sent to
1794-IB16
Output Map Segment
with change of state detection
2
1756–DNB Output Data Table
D D
E E
1794-OB16
output module
1 byte 1 byte
E = data mapped to
1794-OB16
word 0
word 1
word 2
word 3
word 4
word 122