User Manual

54
Modbus Data Mapping Information
In the following tables, we assume the total port number is 8.
The following table is for Function Code 3 (Holding Registers) / Function Code 6.
Address Offset
Data Type
Interpretation
Description
System Information
0x0000 to
0x0008
1 word HEX
Port 1 to Port 8 Status
0x0000:
Disable
0x0001:
Enable
Port 1 to Port 8 Status Configuration
0x0000:
Disable
0x0001:
Enable
The following table is for Function Code 4 (Input Registers). The data map addresses in the following
table starts from Modbus address 30001. For example, the address offset 0x0000H equals Modbus
address 30001, and the address offset 0x0030H equals Modbus address 30049. All the information read
from our switches is in the HEX mode and users can refer to the ASCII table for the translation (e.g.
0x4B=’K’, 0x74=’t’).
Address Offset
Data Type
Interpretation
Description
System Information
0x0030 20 words ASCII
Product Name = “SWITCH”
Word 0 Hi byte =
‘S’
Word 0 Lo byte =
‘W’
Word 1 Hi byte =
‘I‘
Word 1 Lo byte =
‘T’
Word 2 Hi byte =
‘C’
Word 2 Lo byte =
‘H’
0x0050
1 word
Product Serial Number
0x0051 2 words HEX
Firmware Version
For example:
Word 0 =
0x0103
Word 1 =
0x0200
Firmware version is 1.3.2
0x0053 2 words HEX
Firmware Release Date
For example:
Word 0 =
0x1719
Word 1 =
0x1506
Firmware was released on 2015-06-17 at 19
o’clock
0x0055 3 words HEX
Ethernet MAC Address
Ex: MAC = 01:02:03:0A:0B:0C
Word 0 Hi byte =
0x01
Word 0 Lo byte =
0x02
Word 1 Hi byte =
0x03
Word 1 Lo byte =
0x0A
Word 2 Hi byte =
0x0B
Word 2 Lo byte =
0x0C
0x0058 1 word HEX
Power 1
0x0000:
Off
0x0001:
On