CO2 Meter TR250Z, Руководство пользователя

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TR250Z Oxygen Transmitter – Manual CO2Meter.com
Rev. 27 April, 2015 Pg. 9 of 13
Modbus / RS-485
The sensor support MODBUS protocols over RS ‐ 485, unidirectional transmission at 9600kbps. Address 0
or FE.
The following Modbus registers are available:
Input Registers
1. O2 Value, x10
2. Raw ADC Value
Holding Registers
1. O2 Span Value (4 byte floating number, part 1)
2. O2 Span Value (4 byte floating number, part 2)
3. O2 Pot Value
4. 4 ‐ 20mA output Zero Value
5. 4 ‐ 20mA output Span Value (4 byte floating number, part 1)
6. 4 ‐ 20mA output Span Value (4 byte floating number, part 2)
7. Control Register
8. Status Register
The following commands are available:
0x03 – Read Holding Register
0x04 – Read Input Register
0x06 – Write Holding Register
Powering the Unit
The unit can be powered by hardwiring 24 VDC power through the MDCM ‐ 4FP ‐ 2M Cable (included) but
sampling units can also be powered by the included 24VDC International wall power supply.
LCD Display
The Liquid Crystal Display (LCD) screen shows the following features:

CO2 in percentage format (##.##%) for 100%