Object ID
Category
Description
Example
0x81
Extended
Calibration date
2020-11-04
0x85
Extended
Hardware
version
B210887-E
6.4 Byte order
Individual registers follow the Modbus standard big endian byte order for 16-bit values.
Values greater than 16 bits comprise multiple registers. These values are organized as
follows.
32-bit values
In this application programming interface (API), 32-bit values are supported by the means of
2 consecutive 16-bit registers. The byte order for the 32-bit values is middle-endian: bytes
within words are in big-endian order, while words in multi-word values are in little-endian
order.
0C0dh
0A0Bh
0Ch
0Ah
0Dh
0Bh
0Ch
0Ah
0Dh
0Bh
n
n + 1
n
n + 2
n + 1
n + 3
Modbus
registers
Modbus
byte stream
32-bit integer: 168496141
(0A0B0C0Dh)
Figure 3 Byte order for 32-bit values
String fields
Several string type fields are available in this API, for example serial numbers. String fields
consist of 1-byte ASCII characters packed into multiple 16-bit registers, 2 characters each.
AQT530 Configuration Guide
M212572EN-C
44
Summary of Contents for AQT530
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