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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
0x03
1) Register address starts from 0
Tab. 12 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
Read 0x03
Write 0x06
1) Register address starts from 0
Tab. 13 Continuous or single shot measurement
Measuring status: indicates when new single shot measurement is possible.
Function code
0x03
1) Register address starts from 0
Tab. 14 Single shot measurement possible
16
C simplified does not support Modbus encapsulation. Therefore, no Modbus
Register address
[Hex]
1)
0x00
0x08
0x09
C and UART
2
Register address
[Hex]
1)
0x1F8
Register address
[Hex]
1)
0x1F9
C and Modbus over UART.
2
Description
Note
Serial number
EE895 serial number, ASCII, 0 terminated
High-Byte = Major Version
Low-Byte = Minor Version
FW-Version (Major, Minor)
Example:
0x011A
2 ASCII characters for each Register ("EE895")
Sensor name
String is 0-terminated
Note
[Bit 0] Default status = 0
0 = continuous. The EE895 measures at the regular interval set with the
command "CO
measuring interval", see chapter 4.4.3.
2
1 = single shot. The EE895 measures only with the command
"Measuring trigger", see below.
[Bit 1..15]
reserved (must be written as 0)
Note
[Bit 0]: Data ready. The data are available for read out.
0 = busy, 1 = ready
[Bit 1]: Trigger ready. The EE895 is ready for new measurement cycle.
The minimum time interval between two triggers is 10 s.
0 = trigger not possible
1 = ready for new trigger
[Bit 2..15]
reserved (do not use)
User Manual EE895 Miniature Sensor Module for CO
= 1.26 [01=1; 1A=26]
, T and p
2
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