05November2020/V1.0
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Programming command message
SOH C
D STX
Data set
ETX
BCC
15
16 17
5
18
6
8
Error message
STX E R R (
Error
) ETX
BCC
5
6
8
Explanations of the parameters in the tables above:
1
Start character „/“
2
End character „!“
3
Final characters
CR: Carriage return
LF: Line feed
4
Acknowledge character (ACK)
5
Start character for the generation of the block test character (BCC, STX = start of text).
6
This character is not necessary if no data set follows.
6
End character of a block (ETX)
7
End character in a partial block (EOT)
8
Block check character (BCC).
The block begins after the first recognized SOH or STX signal and extends through the ETX character that
ends the message. The calculated block check character follows immediately after the ETX character.
9
Request to send command „?“
10
„0“ – Read data
„1“ – Programming mode
11
Manufacturer identification „EMH“.
12
Baud rate identification (to change the baud rate)
The request message, the identification message and the acknowledge / option select message are sent
with the opening baud rate (9600 bits by default). The baud rate of the further communication depends on
the baud rate set in the protocol.
Communication baud rate:
„0“ 300 Bd
„1“ 600 Bd
„2“ 1200 Bd
„3“ 2400 Bd
„4“ 4800 Bd
„5” 9600 Bd
13
Manufacturer specific identification. Characters with the exception of “/” and “!”. Both last characters „/@“
point on the valid commands R5, R6 and W5.
14
Data block with the measured values. The measured values can be identified based on the table of EDIS
codes.
15
Header character (SOH)
Command sequence
Answer f.