Scanner mode discrete i/o data transfer, Discrete i/o data transfer – Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual User Manual
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Publication 1756-UM534B-EN-P - November 2010
133
Scanner Mode I/O Map Appendix A
Discrete I/O Data Transfer
Discrete Read Structure - Input
0 1 2 3 4 5 6 7 8 9
Status Codes and
Error Codes
Discrete Input Data
1st
16-bit
Word
I
O
I
I
I
I
I
I
I
O
O
O
O
O
O
O
0 1 2 3 4 5 6 7
Group
Group
Group
Group
1/4
Partial Rack
1/4
Partial Rack
1/4
Partial Rack
1/4
Partial Rack
Read
Status Word
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Offset 2…9
Input Words
8 Words of Discrete Input Data
Status Word
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Reserved (Pad for 32-bit Alignment)
Reserved
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
C
ommunication Err
or
1st 1/4 par
tial r
ack
Gr
oup 0-1/NO ERROR
C
ommunication Err
or
2nd 1/4 par
tial r
ack
Gr
oup 2-3/ERROR
C
ommunication Err
or
3r
d 1/4 par
tial rack
Gr
oup 4-5
C
ommunication Err
or
4th 1/4 par
tial rack
Gr
oup 6-7
Discrete Write Structure - Ouput
0 1 2 3 4 5 6 7 8 9
2 Control Words
Discrete Output Data
1st
16-bit
Word
Write
Control Word
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Offset 2…9
Ouput Words
8 Words of Discrete Ouptut Data
Control Word
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Reserved (Pad for 32-bit Alignment)
Reserved
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Inhibit R
ack
1st 1/4 par
tial r
ack
Gr
oup 0-1
Inhibit R
ack
2nd 1/4 par
tial r
ack
Gr
oup 2-3
Inhibit R
ack
3r
d 1/4 par
tial rack
Gr
oup 4-5
Inhibit R
ack
4th 1/4 par
tial r
ack
Gr
oup 6-7
Reset R
ack
1st 1/4 par
tial r
ack
Gr
oup 0-1
Reset R
ack
2nd 1/4 par
tial r
ack
Gr
oup 2-3
Reset R
ack
3r
d 1/4 par
tial rack
Gr
oup 4-5
Reset R
ack
4th 1/4 par
tial r
ack
Gr
oup 6-7
I/O Rack
Scanner Mode
Discrete I/O Data Transfer
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