Ecotech Acoem Serinus 30 - A.2 Commands

Appendix
Page 203
Table 29 – Example: Primary Gas Response
Byte
Number
1
2
3
4
5
6
Continued
in next
table.
Descriptio
n
STX
ID
Command
ETX
Message
Length
Primary
Gas Conc
Value
2
0
1
3
5
50
Checksum
Calculation
0
01=1
15=4
450=54
Table 30 – Example: Primary Gas Response (Continued)
Byte
Number
7
8
9
10
11
12
Description
IEEE representation of 1.00
Checksum
EOT
Value
63
128
0
0
50
4
Checksum
Calculation
5463=9
9128=137
1370=137
1370=137
137
A.2 Commands
Communication Error
Where:
Command byte 0
Message byte 1 0
Message byte 2 0..7
If the command byte of a response is 0, this indicates an error has occurred. The message field will be
2 bytes long, where the 2
nd
byte indicates the error according to the following table.
Table 31 – List of Errors
Error #
Description
0
Bad Checksum received
1
Invalid Parameter Length
2
Invalid Parameter
3
Internal Data Flash Erase in Progress unable to
return data for a few seconds
4
Unsupported Command.
5
Another process is collecting data – unable to
service request.