Rockwell Automation 1738 Assembly Connections for POINT I/O and ArmorPOINT I/O EtherNet/IP Adapters - Manual (Page 29)

23 Publication 1734-UM016A-EN-P - October 2010
Chapter
4
Assembly Structure
Assembly Structure
Examples Byte, Word, and Double Word Alignment
The following chassis is used to demonstrate how the data is aligned for the
Byte, Word, and Double Word alignment options. This chassis was
intentionally assembled as shown to demonstrate as many use cases as
possible. Discrete and analog modules are intermixed. An ARM module is
used to reserve space for a future device. The 1734-IB4D module in slot 8 is
configured to produce 2 bytes while the IB4D module in slot 7 is configured
to produce 1 byte. The ASCII module in slot 10 is configured to produce
9 bytes.
Example POINT system
Cat # A
E
N
T I
B
4 I
B
8 I
B
2 O
B
2
E O
B
4
E O
B
8
E I
B
4
D I
B
4
D I
E
2
C A
S
C A
R
M O
W
4 I
B
4
Slot # 0 1 2 3 4 5 6 7 8 9 1
0
1
1 1
2 1
3
Produced Assembly, Byte Aligned
Byte Bit 7 Bit 6 Bit5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Produce 0 Slot 7 status Slot 6 status Slot 5 status Slot 4 status Slot 3 status Slot 2 status Slot1 status Slot 0 status
Produce 1 Slot 15 status Slot 14 status Slot 13 status Slot 12 status Slot 11 status Slot 10 status Slot 9 status Slot 8 status
Produce 2 Slot 23 status Slot 22 status Slot 21 status Slot 20 status Slot 19 status Slot 18 status Slot 17 status Slot 16 status
Produce 3 Slot 31 status Slot 30 status Slot 29 status Slot 28 status Slot 27 status Slot 26 status Slot 25 status Slot 24 status
Produce 4 Slot 39 status Slot 38 status Slot 37 status Slot 36 status Slot 35 status Slot 34 status Slot 33 status Slot 32 status
Produce 5 Slot 47 status Slot 46 status Slot 45 status Slot 44 status Slot 43 status Slot 42 status Slot 41 status Slot 40 status
Produce 6 Slot 55 status Slot 54 status Slot 53 status Slot 52 status Slot 51 status Slot 50 status Slot 49 status Slot 48 status
Produce 7 Slot 63 status Slot 62 status Slot 61 status Slot 60 status Slot 59 status Slot 58 status Slot 57 status Slot 56 status
Produce 8 Reserved Slot 1 Bit 3 Slot 1 Bit 2 Slot 1 Bit 1 Slot 1 Bit 0
Produce 9 Slot 2 Bit 7 Slot 2 Bit 6 Slot 2 Bit 5 Slot 2 Bit 4 Slot 2 Bit 3 Slot 2 Bit 2 Slot 2 Bit 1 Slot 2 Bit 0
Produce 10 Reserved Slot 3 Bit 1 Slot 3 Bit 0
Produce 11 Reserved Slot 4 Bit 1 Slot 4 Bit 0
Produce 12 Reserved Slot 5 Bit 3 Slot 5 Bit 2 Slot 5 Bit 1 Slot 5 Bit 0
Produce 13 Slot 6 Bit 7 Slot 6 Bit 6 Slot 6 Bit 6 Slot 6 Bit 4 Slot 6 Bit 3 Slot 6 Bit 2 Slot 6 Bit 1 Slot 6 Bit 0
Produce 14 Slot 7 Bit 7 Slot 7 Bit 6 Slot 7 Bit 5 Slot 7 Bit 4 Slot 7 Bit 3 Slot 7 Bit 2 Slot 7 Bit 1 Slot 7 Bit 0