triOS Dissolved Oxygen, Руководство по эксплуатации

Страница: 27 / 32

25
D01-903en201912 Manual Dissolved Oxygen
Dissolved Oxygen //
Annex
Number Parameter Unit
1 Temperature °C
2 Oxygen saturation %
3 Oxygen concentration mg/l
4 Oxygen concentration ppm
Modbus RTU
Parameters
Supported Modbus functions
These Modbus function codes are supported by the sensor:
Name Code Description / Use
Read multiple registers 0x03
Read the serial number, firmware version and of course measurement
data
Write single register 0x06 Write a value in one register
Write multiple registers 0x10 Write data into a sequence of registers
Report slave ID 0x11 Get the sensor identification
Name Register Count Format
Uint16 1 Unsigned 16 bit integer. Value range: 0x0000 - 0xFFFF
Bits16 1
Register contains a bitmask, where every bit has a special meaning. This is most
often used for parameter selection, where Bit 1 corresponds to the temperature
and the following bits to parameter 1, 2, 3 and 4
Bits32 2 A bit vector using 32 bits, same as Bits16 but spanning two registers
Uint32 2 Unsigned 32 bit integer. Value range: 0x00000000 - 0xFFFFFFFF
Float 2 IEEE 754 32 bit floating point value
ASCII 1+
A sequence of ascii characters with two 8 bit characters stored in each 16 bit
register
Date 8
A date in the form mmhhddMMYYYY, where mm is the minute, hh the hour, dd
the day, MM the month and YYYY the year
Data types
All multi-register datatypes are stored in big-endian word order. That is the word with the most significant bits is stored at the
lesser register address.