Access To The Web Server - Siemens CP 1243-7 LTE Operating Instructions Manual

Configuration
4.7 Ethernet interface (X1)
● Watchdog monitoring time
With the watchdog cycle, the CP checks the connection to the telecontrol server. The
watchdog cycle is the interval without data exchange between the CP and telecontrol
server after which the CP sends a watchdog frame to the telecontrol server. The
watchdog cycle is only configured with TCSB (parameter "Keepalive monitoring time").
The value configured in TCSB is transferred by the telecontrol server to the CP the first
time the connection is established.
Each time the CP transfers data to TCSB and receives the acknowledgment from the
telecontrol server, the CP starts the watchdog cycle. When the watchdog cycle has
expired the CP sends a watchdog frame to the telecontrol server.
After sending a watchdog frame, the CP starts the watchdog monitoring time within which
the CP expects a reply from the telecontrol server. If the CP does not receive a reply from
the Telecontrol server within the monitoring time, it terminates and re-establishes the
connection.
Default setting: 30 s. Permitted range: 0...65535 s. If you enter 0 (zero), the function is
disabled.
● Key exchange interval
Here, you enter the interval in hours after which the key is exchanged again between the
CP and the telecontrol server. The key is a security function of the telecontrol protocol
used by the CP and TCSB V3.
Default setting: 8 s. Permitted range: 0...65535 s. If you enter 0 (zero), the function is
disabled.
4.7.1

Access to the Web server

Access to the Web server of the CPU
The Web server of the S7-1200 station is located in the CPU. Via the CP, you have access
to the Web server of the CPU.
From a PC you can access the Web server of the station via TCSB if the PC is connected to
the telecontrol server via LAN.
For the requirements, refer to the manual Auto-Hotspot.
With slow transmission paths between telecontrol server and station, make sure that you set
the update time of the Web browser suitably low.
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Operating Instructions, 04/2017, C79000-G8976-C381-03
CP 1243-7 LTE