11.6 ASCII protocol
11.6.1 Telegram Format for the ASCII Protocol
For the request-and response telegrams the ASCII-protocol
distinguishes between telegrams without and with check sum.
The telegrams are characterized with different start-delimiters
(SD). A request telegram without a check sum will lead to a re-
sponse telegram which also contains no check sum. The same
applies to for requests with check sum, accordingly. Further-
more there are two short telegrams with the length of one char-
acter each to perform a positive or negative acknowledgement.
Commenti su questo manuale