7-12
VersaPoint™ I/O System Profibus-DP NIU User’s Manual – August 2005
GFK-1911B
7
Byte Rotation for 16-Point Discrete Modules
Default
Format
Byte 0
Byte
1
Rotated
Format
Byte
1
Byte
0
Bit
7 6 5 4 3 2
1
0 7 6 5 4 3 2
1
0
Slot 4
3
2
1
Module
point
2.4
1
.4 2.
1
1
.
1
2.4
1
.4 2.
1
1
.
1
2.4
1
.4 2.
1
1
.
1
2.4
1
.4 2.
1
1
.
1
Byte Rotation for 32-Point Discrete Modules
By default channels
1
- 8 (slot.x) are on byte n+3 and channels 9 -
1
6 (slot
2.x) are on byte n+2, channels
1
7 - 24 (slot 3.x) are on byte n+
1
, and
channels 25 - 32 (slot4.x) are on byte n.
If the format is rotated, points
1
- 8 (slot
1
.x) are on byte n, points 9 -
1
6 (slot
2.x) are on byte n+
1
, points
1
7 - 24 (slot 3.x) are on byte n+2, and points 25
- 32 (slot 4.x) are on byte n+3.
Byte Byte
0
Byte
1
Byte 2
Byte 3
Bit
7 6 …
1
0 7 6 …
1
0 7 6 …
1
0 7 6 …
1
0
Default,
Slot
4 3 2
1
Default,
Module
Point
8.4 7.4 … 8.
1
7.
1
6.4 5.4 … 6.
1
5.
1
4.4 3.4 … 4.
1
3.
1
2.4
1
.4 … 2.
1
1
.
1
Rotated,
Slot
1
2 3 4
Rotated
Module
Point
2.4
1
.4 … 2.
1
1
.
1
4.4 3.4 … 4.
1
3.
1
6.4 5.4 … 6.
1
5.
1
8.4 7.4 … 8.
1
7.
1
Summary of Contents for VersaPoint IC220PBI002
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