User manual

Smart_DP RM 9600 User Manual
Seite 7
The RS232 interfaces of the Smart_DP modules must connected to the RS232 interfaces of
the radio modems. Please refer to point E.2 - „Connection of the hardware“.
Data will be exchange as fast as possible between the Radio Master (Profibus network) and
the individual Radio Slaves (Profibus networks) over radio in a polling mode.
The Radio Master changes the address of the controller from 1 to the defined number of con-
figured Radio Slave address (1 to max 8) beginning with 1, 2, and so on. After changing the
address the Radio Master try to send the configured data bytes (the number was requested
from Radio Slave after changing address) to the specific Radio Slave.
After the Radio Slaves receives the data bytes it sends its own configured data bytes to the
Radio Master. If a Radio Slave doesn’t answer within a predefined time, the Radio Master is
changing to the next address automatically, according the defined timeout parameters (see
section F3.1 and F3.4 for details)
Exception:
If only one Radio Slave is configured the address change by the Radio Master is made only
one time. So there is a time saving factor improving the data throughput.
Attention:
Radio Master and Slaves need to be configured with a Guard Time of 200 ms to avoid a mix of
‘Set Address’-command format with real data being transmitted.