Allen-Bradley DeviceNet 1756-DNB - Node Address 22 Input and Output Data

B–11Scan List Example
Publication 1756–6.5.15 – July 1998
Node Address 22 Input and Output Data
1 byte
61
The FLEX I/O module at node address 22 is a
change of state device that produces 6 bytes of
input data. Only 4 bytes are mapped.
Remember that this node must be enabled in
the scan list before it may participate in I/O
communication with the communication module.
In map segment 1, input data is taken from the
change of state message starting at byte 0,
bit 0.
This input data is mapped to the communication
module’s input image table starting at word 5,
bit 0.
The number of bits mapped is 32.
FLEX I/O module
FLEX I/O input bytes
Change of state message
The FLEX I/O module at node address 22 is a
change of state device that receives 4 bytes of a
change of state message containing its
output data.
Remember that this node must be enabled in
the scan list before it may participate in I/O
communication with the communication module.
In map segment 1, output data is mapped to a 4
byte chage of state message starting at byte 0,
bit 0.
This output data is mapped from the
communication module’s output image table
starting at word 1, bit 0.
The number of bits mapped is 32.
FLEX I/O module
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte
1 byte 1 byte 1 byte
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