Byte Rotation For 16-Point Discrete Modules; Byte Rotation For 32-Point Discrete Modules - GE VersaPoint IC220PBI002 User Manual

7

Byte Rotation for 16-Point Discrete Modules

Default Byte 0
Format
Rotated Byte1
Format
Bit 7
Slot 4
Module 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
point

Byte Rotation for 32-Point Discrete Modules

By default channels 1 - 8 (slot.x) are on byte n+3 and channels 9 - 16 (slot
2.x) are on byte n+2, channels 17 - 24 (slot 3.x) are on byte n+1, and
channels 25 - 32 (slot4.x) are on byte n.
If the format is rotated, points1- 8 (slot1.x) are on byte n, points 9 - 16 (slot
2.x) are on byte n+1, points 17 - 24 (slot 3.x) are on byte n+2, and points 25
- 32 (slot 4.x) are on byte n+3.
Byte Byte 0
Bit
7 6
Default,
4
Slot
Default,
Module
8.4 7.4 ...
Point
Rotated,
1
Slot
Rotated
Module
2.4 1.4 ...
Point
7-12 VersaPoint™ I/O System Profibus-DP NIU User's Manual – August 2005
6 5 4 3 2
3
Byte 1
... 1 0 7 6 ...
3
8.1 7.1 6.4 5.4 ...
2
2.1 1.1 4.4 3.4 ...
Byte 1
Byte 0
1 0 7 6 5
2
Byte 2
1 0 7 6 ... 1
2
6.1 5.1 4.4 3.4 ... 4.1 3.1 2.4 1.4 ...
3
4.1 3.1 6.4 5.4 ... 6.1 5.1 8.4 7.4 ...
4 3 2 1 0
1
Byte 3
0 7 6 ... 1 0
1
2.1 1.1
4
8.1 7.1
GFK-1911B