Allen-Bradley DeviceNet 1756-DNB - Node Address 3 Input Data; Node Address 4 Input Data

B–5Scan List Example
Publication 1756–6.5.15 – July 1998
Node Address 3 Input Data
Series 9000 photoelectric sensor
photoelectric sensor input byte
3D3S
1 byte
The photoelectric sensor at node address 3
is a strobed device that produces 1 byte of
input 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, input data is taken from
the strobe response starting at byte 0, bit 0.
This input data is mapped to the communica-
tion module’s input image table starting at
word 0, bit 14.
The number of bits mapped is 2 (1 data bit
and 1 status bit).
Node Address 4 Input Data
Series 9000 photoelectric sensor
photoelectric sensor input byte
4D4S
1 byte
25D25S
The photoelectric sensor at node address 4 is a
strobed device that produces 1 byte of input
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, input data is taken from the
strobe response starting at byte 0, bit 0.
This input data is mapped to the communication
module’s input image table starting at word 1, bit
0.
The number of bits mapped is 2 (1 data bit
and 1 status bit).
Allen-Bradley Drives