Balogh ERCP 81 Kullanıcı Kılavuzu - Sayfa 5

Alıcı-Verici Balogh ERCP 81 için çevrimiçi göz atın veya pdf Kullanıcı Kılavuzu indirin. Balogh ERCP 81 8 sayfaları.

Sayfayı Yazdır

2.2 STRUCTURE OF MESSAGES SENT OR RECEIVED BY THE ERCP 81

The successive messages must be separated by a time equal to the time it takes to send 5 characters.
General message structure:
In transmission:
The 4 most significant bits give the size of the whole message (2 or 14 bytes), the 4
least significant bits represent a radio transmission error counter.
In the case of a valid exchange, the content of the error counter does not change.
In the case of an invalid exchange, the content of the error counter is incremented by 1
(with saturation at the maximum value of 15 or 4 bits). The ERCP 81 transmits the last
valid message received during this transmission or, if no valid message has been
received during the transmission, it transmits an acquisition error message to the
interface.
The error counter is reset to 0 outside of radio communication phases.
In reception :
The 4 most significant bits give the size of the whole message (14 bytes); the 4 least
significant bits are forced to zero.
bit
bit
bit
bit
7
6
5
4
0
0
0
0
0
0
0
0
E4
E3
E2
E1
0
0
0
0
E4
E3
E2
E1
BALOGH SA,
189 rue d'Aubervilliers C.P. 97 75886 PARIS Cedex 18 FRANCE
<Length/Error><Function><Contents>
<Length/Error>:
< Function >:
In transmission :
bit
bit
bit
bit
3
2
1
0
acknowledgement of receipt and end of message
0
0
0
1
Total length of the message = 2 bytes
reject notice for incorrect reception and end of message
0
0
1
0
Total length of the message = 2 bytes
transmission of message contents to the interface
0
0
1
1
E1 to E4 are images of the facing device inputs.
Total length of the message = 14 bytes
Error during radio transmission and end of message
0
1
0
0
Total length of the message = 2 bytes
Sending of the facing device identifier to interface.
0
1
1
1
E1 à E4 are images of the facing device inputs.
Total length of the message = 14 bytes
sous réserve de modification - Réf : M-ERCP 81-1.0-GB
ERCP 81
Field one byte in length:
Field one byte in length with the value:
Tableau 1
5 / 8
p