Allen-Bradley DeviceNet 1756-DNB - Redistation Operator Interface Output Mapping Scheme Example

B–7Scan List Example
Publication 1756–6.5.15 – July 1998
RediSTATION Operator Interface Output Mapping
Scheme Example
0000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
Word 0
Word 1
Word 2
Word 3
Word 4
Word 5
Host Platform
Output Image Table
word 1
word 0
RediSTATION Operator Interface Output Bytes
RediSTATION node address 5 RediSTATION node address 6
RediSTATION node address 7 RediSTATION node address 8
5L
7L
6L
8L
1 byte
1 byte
1 byte
1 byte
The station indicator-light bit
for each RediSTATION
operator interface is
mapped to the communication
module’s output image table.
1
2
The output image table
is then sent to the operator
interfaces via four poll
messages, from which each
operator interface receives its
indicator-light bit.
5L6L7L8L
1756–DNB Communication Module Output Data Table
Example: RediSTATION #5’s indicator-light
bit is taken from word 0, bit 10 (5L) in the out-
put image table.
1
2
word 123
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