Ecotech EC9830 - Protocol Definition and Selection

EC9830 CO ANALYZER OPERATION MANUAL
4-10 98307600 Rev. C-1
This is an example of a valid command to put the unit in the manual span mode if
the instrument has an I.D. of 843:
<STX>ST843 K<ETX>52
The block check operation is best shown with the following table:
Character Hex Value Binary Block Check
<STX>
02 0000 0010 0000 0010
S
53 0101 0011 0101 0001
T
54 0101 0100 0000 0101
8
38 0011 1000 0011 1101
4
34 0011 0100 0000 1001
3
33 0011 0011 0011 1010
20 0010 0000 0001 1010
K
4B 0100 1011 0101 0001
<ETX>
03 0000 0011 0101 0010
The binary block check value is 0101 0010 which is the hex value 52 as shown at
the end of the command string.
4.4.3 Protocol Definition and Selection
There are three protocol selections available for the EC9830 via the INTERFACE
MENU. These are provided so the user may select the appropriate protocol for their
desired application. The first protocol designated original should be used when
upgrading software in analyzers that are already in serial networks. The original
protocol is provided for back-compatibility as it completely duplicates the
protocol already in the field. The second protocol provided is Bavarian. The
Bavarian protocol should be used with the Bavarian Network Command Set for
any Bavarian network applications. Note specifying the Bavarian protocol still
allows the user to access the 9800 command set. The third protocol provided is
the enhanced protocol. The enhanced protocol provides a more robust
handshaking environment as specified in section 4.4.3.9.
4.4.3.1 Original Protocol
This protocol is provided for back compatibility with pervious versions (before
Version 2.05) of 9800B software. There are a number of idiosyncrasies in the
original protocol that are preserved to allow existing applications to use upgraded
software without modifying their interface.