Ecotech A Series User Manual

CHAPTER 4, DIGITAL COMMUNICATION
98307600 Rev. C-1 4-9
Bavarian Network Command Format: <STX><TEXT><ETX><BCC1><BCC2>
Where:
<STX>
= ASCII Start Of Transmission = 02 hex
<TEXT>
= ASCII text maximum length of 120 characters
<ETX>
= ASCII end of transmission = 03 hex
<BCC1>
= ASCII representation of block check value MSB
<BCC2>
= ASCII representation of block check value LSB
The block check algorithm begins with 00 Hex and exclusive-OR each ASCII
character from <STX> to <ETX> inclusive. This block check value is then
converted to ASCII format and sent after the <ETX> character.
4.4.2.1 Examples
The following is an example of a valid Bavarian data request for an instrument
that has an I.D. of 97:
<STX>DA097<EXT>3A
The block check calculation is best shown by the following table:
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. Please note that the I.D.
of 97 is sent as the sequence 097. All I.D. strings must have 3 digits and the user
should always pad with ASCII zero characters.

Ecotech A Series Specifications

General

Brand	Ecotech
Model	A Series
Category	Measuring Instruments
Language	English