Appendix C: Timeout; Appendix C Timeouts; Table 18: Timeouts At The Ethernet - Siemens SIMATIC NET CP 243-1 Technical Manual

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Appendix C Timeouts

The values presented in the following tables are the times after which the associ-
ated action is initiated at the earliest.
At the Ethernet
Meaning
Maximum waiting time until a telegram
must have been received in its entirety
via TCP/IP.
Maximum waiting time until a telegram
must have been sent in its entirety via
TCP/IP.
Maximum waiting time of the CP until the
CPU responds to a command sent to it
by an external client.
Logout time if all channels are occupied
and MW is not yet connected (so that
the MW can always establish a connec-
tion).
Interval in which incoming connection
establishment requests are processed.
Waiting time after unsuccessful connec-
tion establishment attempt by a client
Waiting time of a client for the confirma-
tion of a connection establishment re-
quest
Maximum time for successful BOOT
command

Table 18: Timeouts at the Ethernet

CP 243-1
J31069-D0428-U001-A1-7618
Action at timeout
Telegram fragment discarded, CP
closes the connection
Abort sending, CP closes the con-
nection
Discard action, CP waiting for new
commands, client does not receive
response
The oldest of the connected TCP/IP
servers that could not yet be as-
signed via TSAP aborts the connec-
tion and waits for the connection to
be re-established
Delay of next connection establish-
ment
Attempt to establish a connection is
repeated
Client closes the connection and re-
connects
New attempt to receive a valid con-
figuration either from the S7-200
CPU memory or via a BOOTP server
Timeouts
Fixed time in
seconds
3
3
60
60
1
10
6
24 attempts in inter-
vals of 2.5 seconds =
60 seconds
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