Siemens RF182C Operating Instructions Manual page 39

● The RESET message frame created by the user is sent to the corresponding reader.
● The process continues with a command message frame depending on the application.
● After longer periods without message frames (approx. 3 s), the application (client) can
● The connections (including TCP/IP) can be canceled by both sides due to the following
● After disconnection by the server, the client must reconnect, send a RESET command,
Data communication
The graphic below shows the principle of data communication between application (client)
and RF182C:
Figure 5-3
RF182C communication module
Operating Instructions, 10/2010
automatically send a heartbeat frame (line monitoring) to test the connection. The
RF182C communication module then acknowledges the message frame.
You yourself must ensure that the connection is monitored and define the interval after
which the client should automatically send a heartbeat message frame.
If, in case of an error, no response is sent in answer to the heartbeat message frame
from the RF182C, the client must then initiate further actions
(disconnect/connect/parameterize the reader).
causes:
– Inactivity (timeout, keep-alive on TCP level)
– Connection error
– Disconnection request
etc.
Data communication principle
5.2 Data communication between client and RF182C
Parameterizing
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