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INTEGER 16 bit
Parameter
Read register: function code 0x03
Temperature T**
Temperature T**
Temperature T**
CO
(average)
2
CO
(raw)
2
Pressure p*
Pressure p*
1) Register number starts from 1
2) Register address starts from 0
3) Examples: For scale 100, the reading of 2550 means a value of 25.5. For scale 50, the reading of 2550 means a value of 51.
Tab. 10 I
C and UART Modbus register map for 16 bit signed integer values
2
4.4
EE895 Commands
The following commands are available via Modbus over I
Please note: I
2
communication and no settings are possible.
4.4.1
Information
Function code
0x06
1) Register address starts from 0
Tab. 11 Available commands for I
Please note: When reading the serial number or the sensor name, it is always necessary to read all 8
registers, even if the desired information requires less.
4.4.2
General Settings
The following functions allow for EE895 settings. These are stored in the RAM, therefore they are volatile.
Measuring mode: continuous or single shot
Function code
0x03
1) Register address starts from 0
Tab. 12 Continuous or single shot measurement
User Manual EE895 Miniature Sensor Module for CO
Unit
Scale
° C
100
° F
50
K
50
ppm
1
ppm
1
mbar
10
psi
100
C simplified does not support Modbus encapsulation. Therefore, no Modbus
Register address
[Hex]
Description
1)
0x00
Serial number
0x08
FW-Version (Major, Minor)
0x09
Sensor name
C and UART
2
Register address
[Hex]
Note
1)
[Bit 0] Default status = 0
0x1F8
[Bit 1..15]
, T and p
2
Register number
[DEC]
3)
1)
4002
4003
4005
4031
4032
4101
4102
C and Modbus over UART.
2
Note
EE895 serial number, ASCII, 0 terminated
High-Byte = Major Version
Low-Byte = Minor Version
Example:
0x011A
2 ASCII characters for each Register ("EE895")
String is 0-terminated
0 = continuous. The EE895 measures at the regular interval set with the
command "CO
measuring interval", see 4.4.3.
2
1 = single shot. The EE895 measures only with the command
"Measuring trigger", see below.
reserved (must be written as 0)
Register address
[HEX]
2)
0xFA1
0xFA2
0xFA4
0xFBE
0xFBF
0x1004
0x1005
= 1.26 [01=1; 1A=26]
15
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