Manual BG41/BG42/BG43 Software
Rev. 99/49 4-43
4.1.8.2 Procedure
The following describes the structure of the procedure and the telegrams:
Fig. 4-4: Structure of the procedure 3964(R) with RK512
Time-outs:
The following times are regarded as time-out:
Acknowledgement delay time: (QVZ) = 2000 ms
Character delay time: (ZVZ) = 220 ms
QVZ is monitored between STX and DLE as well as between BCC and DLE. ZVZ is monitored
during the entire reception of the telegrams.
STX is transmitted again when QVZ is expired to STX. After 5 attempts a NAK is sent and the
connection set-up is terminated. The same happens when an NTX or any character has been
received after an STX.
When the QVZ is expired after the telegram (after BCC byte) or when a character unequal to DLE is
received, the connection set-up and the telegram are repeated. Five attempts are also undertaken,
after which a NAK is transmitted and the transmission interrupted.
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