User manual
39
I/O Addressing
Addressing is based on the location of the module.
Example 1: 8-slot system
Example of addressing for the system shown above
I/O addressing guidelines
The processor automatically distinguishes input address from output
address for each module mounted.
A word address is allocated to a 16-point input or output module. For a
32-point mixed I/O module, 2 word addresses are allocated, a word
address for inputs and another for outputs. For the 16-point mixed I/O
module, 2 word addresses are allocated but only the lower 8 bits (0 to
7) of each word address can be used.
The modules mounted into the slots that are closer to the processor
module have lower addresses.
An empty slot means no module is mounted and a blank module
(NX-DUMMY) may be installed.
POWER
Programmable
Controller
S MSUNG
OPEN
INIT
TEST
RUN
RMT
PROG
12
39 404039
213940 21
2 1 39 40
40 39 1 2
2 1 39 40
15
16
20
19
18
17
5
7
6
8
11
10
9
12
14
13
2
1
3
4
15
16
20
19
18
17
5
7
6
8
11
10
9
12
14
13
2
1
3
4
15
16
20
19
18
17
5
7
6
8
11
10
9
12
14
13
2
1
3
4
15
16
20
19
18
17
5
7
6
8
11
10
9
12
14
13
2
1
3
4
RS232C
TOOL
RS232C
COM
NX-C PU700p
CPU
NX-X64D
DC IN
NX-X64D
DC IN
NX-X32D
DC IN
NX-Y32T
TR OU T
NX-Y16R V
RY O UT
NX-Y16R V
RY O UT
NX-Y16R V
RY O UT
NX-Y16R V
RY O UT
64
inputs
64
inputs
32
inputs
32
outputs
16
outputs
16
outputs
16
outputs
16
outputs
0 1234567Slot No.
Slot
number
00 01 02 03 04 05 06 07
Word
address
Processor
module
R0 to R3 R4 to R7 R8 to R9 R10 to R11 R12 R13 R14 R15
Bit
address
R0.0
R0.1
R0.2
~
R0.15
R4.0
R4.1
R4.2
~
R7.15
R8.0
R8.1
R8.2
~
R9.15
R10.0
R10.1
R10.2
~
R11.15
R12.0
R12.1
R12.2
~
R12.15
R13.0
R13.1
R13.2
~
R13.15
R14.0
R14.1
R14.2
~
R14.15
R15.0
R15.1
R15.2
~
R15.15