Object Id
(decimal)
Object Id
(hexadecimal)
Object Name
Example Contents
4
04
hex
ProductName
Hydroxen Peroxide, Humidity, and
Temperature Probe HPP272
128
80
hex
SerialNumber
Serial number of the device (for
example “K0710040”)
129
81
hex
Calibration date
Date of the factory calibration
130
82
hex
Calibration text
Information text of the factory
calibration
A.4.5 Test Value Registers
Table 19 Test Value Registers
Address
(Decimal)
Address
(Hexadecimal)
Register
Description
Data Format
Value
7937
1F00
hex
Signed integer
16-bit integer
-12345
7938
1F01
hex
Floating point
32-bit float
-123.45
7940
1F03
hex
Text string
8-character ASCII
string
"-123.45"
Appendix A – Modbus Reference
57