User manual

Smart_DP RM 9600 User Manual
Seite 21
F.3.6 Diagnose data for a ‘Radio Slave’
The Smart_DP module provides the Profibus master the possibility to obtain diagnose informa-
tion about errors from the Profibus slave device (Radio Slave). Because of that, the Smart_DP
module is coding the diagnose information in 7 Profibus user-specific diagnose bytes.
Byte (user specific) Bit Description
1 to 4 Internally (DPV1) used
0 RS-232 TX-Buffer Overflow
1 RS-232 RX-Buffer Overflow
2 Inputlength-Error
3 Outputlength-Error
4 Baudrate-Error
5 Parity-Error
6 Stopbit-Error
5
7 Bytesize-Error
6 0 LRC Error
1-6 Not used
7 RADIO_TX_FULL
7 0 NO_LINK
1-7 Not used
The first 4 bytes of the user-specific diagnose data, the bit 1 to 6 in the 6
th
byte and the bit 1 to
7 in the 7
th
byte respectively are not relevant for information.
For radio modem operation, the following diagnose information is important:
LRC Error: This error bit signals to the profibus master, that the actual checked LRC Byte
from the corresponding partner was wrong.
RADIO_TX_FULL: This parameter informs the profibus master that the radio modems TX
buffer is full.
NO_LINK: This error bit signals to the profibus master, that no actual data is transmitted from
the polling Radio Master system since a configured time.
The remaining diagnose bits mentioned above are not relevant in that case.