Chapter 3 addressing – Rockwell Automation 1747-DCM,D17476.8 Direct Communication Module User Manual
Page 30
Chapter 3
Addressing
3–6
10
9
Word 2
Word 3
Word 4
Word 5
Word 6
Word 7
Octal
15
14 13 12 11
10
7
6
5
4
3
2
1
0
Group 0
Group 1
Group 0
Group 1
17
16
DCM 1
DCM 2
DCM 3
Module 2 Configured As:
Rack Address
2
I/O Group
0
Slot Number
1
Rack Size
1/4
Module 1 Configured As:
Rack Address
1
I/O Group
0
Slot Number
1
Rack Size
Full
Module 3 Configured As:
Rack Address
2
I/O Group
2
Slot Number
2
Rack Size
1/2
Supervisory SLC or PLC
Remote I/O Scanner
DCM 1
Word 0
Word 1
Reserved for Status Word
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Group 2
Group 3
Group 4
Group 5
15
14 13 12 11 10
7
6
5
4
3
2
1
0
9
8
Reserved for Status Word
Bit Number: Decimal
Word 0
Word 1
15
14 13 12 11 10
7
6
5
4
3
2
1
0
9
8
Word 0
Word 1
Word 2
Word 3
Bit Number: Decimal
15
14 13 12 11 10
7
6
5
4
3
2
1
0
9
8
I:1.1/8
(Slot 1, Word 1, Bit 8 Decimal)
I:1.1/3
(Slot 1, Word 1, Bit 3 Decimal)
O:021/2
(Rack 2, Group 1, Bit 3 Octal)
O:011/10
(Rack 1, Group 1, Bit 10 Octal)
O:025/13
(Rack 2, Group 5, Bit 13 Octal)
I:1.3/11
(Slot 2, Word 3, Bit 11 Decimal)
Bit Number: Decimal
Scanner Output Image
SLC 1 Input Image for DCM 1
SLC 2 Input Image for DCM 2
SLC 3 Input Image for DCM 3
Group 6
Group 7
Reserved for Status Word
Reserved for Status Word
Reserved for Status Word
Reserved for Status Word
Reserved for Status Word
DCM 2
DCM 3
Supervisory SLC or
PLC Processor
RIO Link
Distributed SLC
Processor 2
Distributed SLC
Processor 1
Distributed SLC
Processor 3
13
12 11
8
7
6
5
4
3
2
1
0
15
14
Decimal
Bit Number: