ioPAC 8020 Rugged Remote I/O
Modbus/TCP Address Mappings
C-3
System Configuration Map (Input register map)
Using System Configuration Map, users can read the ioPAC system information. The ioPAC 8020 Modbus
addressing is fixed mode; every module occupies 512(0x200) of address space. That means that each slot has
its own address space of 512. The base address is begins from 0x6000.
Slot No.
Beginning Address
Total Address Space
0
0x6000
512 (0x200)
1
0x6200
512 (0x200)
2
0x6400
512 (0x200)
3
0x6600
512 (0x200)
4
0x6800
512 (0x200)
Modbus Table
System Configuration Map
Input register map (Read-Only)
Address offset
Access
Data Format
Description
0x0000 ~0x0016
Reserved
0x0017 ~ 0x002A
R
20 Word
Product Name
0x002B ~0x0030
R
2 Word
Product Number
0x0031
R
1 Word
Number of TCP connection
0x0032
R
3 Word
MAC0
0x0037
R
1 Word
Click&Go Ready flag
Holding register map(R/W)
Address offset
Access
Data Format
Description
0x0000
R/W
2 Word
LAN-0 IP
0x0002
R/W
2 Word
LAN-0 Mask
0x0004
R/W
2 Word
Gateway-0
0x0006
R/W
1 Word
LAN-0 IP Acquisition mode
0x0007
R/W
2 Word
DNS-1
0x0009
R/W
2 Word
DNS-2
0x000B
R/W
1 Word
Connection idle timeout
0x000C
R/W
1 Word
Local Timer second
0x000D
R/W
1 Word
Local Timer minute
0x000E
R/W
1 Word
Local Timer hour
0x000F
R/W
1 Word
Local Timer day
0x0010
R/W
1 Word
Local Timer month
0x0011
R/W
1 Word
Local Timer year
0x0012
R/W
1 Word
TimeZone
0x0014
R/W
5 Word
Password
0x0019
R/W
1 Word
Connection watchdog timeout
0x001A
R/W
1 Word
Safe mode status
Bit 0: connection WDT
Bit 1: Hot-swap
0x001B
R/W
1 Word
IP filter enable/disable