Ecotech Serinus 44 User Manual

Serinus 44 User Manual 3.0
Page 168
Appendix C. Bayern-Hassen Protocol
All Bayern-Hassen Network commands follow the command format as specified in this section.
Bayern-Hassen Network Command Format
<STX><text><ETX>< bcc1><bcc2>
Where:
<STX> = ASCII Start of Transmission = 0x02 hex
<Text> = ASCII text maximum length of 120 characters
<ETX> = ASCII end of transmission = 0x03 hex
<bcc1> = ASCII representation of block check value MSB
<bcc2> = ASCII representation of block check value LSB.
The block check algorithm begins with 0 and exclusive-OR’s each ASCII character from <STX> to
<ETX> inclusive. This block check value is converted to ASCII format and sent after the <ETX>
character.
Examples
This is an example of a valid Bayern-Hassen data request for an instrument that has an ID of 97:
<STX>DA097<EXT>3A
The block check calculation is best shown by the following example:
Table 13 – Bayern-Hassen Data
Character
Hex Value
Binary
Block Check
<STX>
02
0000 0010
0000 0010
D
44
0100 0100
0100 0110
A
41
0100 0001
0000 0111
0
30
0011 0000
0011 0111
9
39
0011 1001
0000 1110
7
37
0011 0111
0011 1001
<ETX>
03
0000 0011
0011 1010
The binary value 0011 1010 corresponds to the hex value 3A. This value in ASCII forms the last two
characters of the data request message.
Note: The I.D. of 97 is sent as the sequence 097. All I.D. strings must have three digits and you should
always pad with ASCII zero characters.

Ecotech Serinus 44 Specifications

General

Brand	Ecotech
Model	Serinus 44
Category	Measuring Instruments
Language	English