Siemens S7-300 - Configuring ISO-On-TCP Connection Properties; Specifying ISO-On-TCP Addresses

Configuring communications connections
5.5 Configuring ISO-on-TCP connection properties
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13
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Max. count Max. Count is the number of send attempts including the first
send attempt (1 - 100, DEFAULT 5).
modifiable
Inactivity time The Inactivity Time specifies the time after which the connection
is terminated if no further sign of life is received from the partner
station (6 - 180 s, DEFAULT 30 s).
modifiable
Window time The Window Time specifies the interval at which sign of life
frames are sent. For SIMATIC NET CPs, the Window Time is
fixed at 1/3 of the Inactivity Time (2 - 60 s, DEFAULT 10 s). Sign
of life frames are sent to be able to check the connection with
frames during times when there is no data traffic.
readonly
Note
Window Time and Inactivity Time
Sign of life frames are replied to by the partner station with a frame. For this reason, they are
sent at the intervals of the Window Time. To avoid unwanted connection aborts, the Inactivity
Time should be at least three times as long as the Window Time.
5.5
Configuring ISO-on-TCP connection properties
5.5.1
Specifying ISO-on-TCP addresses
Address parameters
A connection is specified by the local and remote connection endpoint.
● Local addresses:
Local IP address and local TSAP
(Transport Service Access Point)
● Remote addresses:
Remote IP address and remote TSAP