24: R
EMOTE
I/O S
YSTEM
24-6
O
PEN
N
ET
C
ONTROLLER
U
SER
’
S
M
ANUAL
Special Data Registers for Remote I/O Node Information
Four data registers are allocated to each node to store information of the slave station. The remote I/O node information is
stored to special data registers D8050 through D8177 while the remote I/O communication is in normal operation. The
remote I/O node information is not stored when special data register D8178 (INTERBUS master system error information)
stores 6, 7, or 8 to indicate a data size error, ID code error, or maximum node quantity over, respectively. See page 24-10.
Logical Device No. (Bus Segment No. + Position)
Length Code
Note:
The data register assigned to the length code stores the quantity of the input or output points, whichever is larger, of
the slave station. When using the SX5S as a slave, the length code can be 8 bits (1 byte) or 16 bits (2 bytes).
ID Code
Device Level
7
6
5
4
3
2
1
0
Bus segment number
15 14 13 12 11 10 9
8
Position
7
6
5
4
3
2
1
0
Always 0
Bit 7
Bit 6
Unit
0
0
(reser ved)
0
1
Nibbles
1
0
Bytes
1
1
Bits
Value
15 14 13 12 11 10 9
8
Always 0
Quantity of PCP Words
(peripherals communication protocol)
I/O Type
Station Type
ID Code Examples
ID Code (Low Byte)
Type
01h
Digital output remote bus station (example: SX5S-SBT16K)
02h
Digital input remote bus station (example: SX5S-SBN16S)
03h
Digital I/O remote bus station (example: SX5S-SBM16K)
31h
Analog output remote bus station
32h
Analog input remote bus station
7
6
5
4
3
2
1
0
15 14 13 12 11 10 9
8
Always 0
INTERBUS Device Level: 0 through 15
7
6
5
4
3
2
1
0
15 14 13 12 11 10 9
8
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