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Configuration
The TCP/IP address parameters (IP address, subnet mask, IP address of a gate-
way) can be specified during configuration in one of two ways. They can be speci-
fied permanently or dynamically (the CP 243-1 IT takes the TCP/IP address pa-
rameters from a BOOTP server during startup).
The configuration data stored in the memory of the CP 243-1 IT can be loaded via
the PPI interface to the S7-200 CPU. If the CP 243-1 IT already has a TCP/IP ad-
dress, these configuration data can also be loaded to the S7-200 CPU via TCP/IP
and the Ethernet interface of the CP 243-1 IT. The CP 243-1 IT must already have
an IP address before the configuration data of the IT services can be loaded to the
CP 243-1 IT.
If an S7-200 system is to communicate via a CP 243-1 IT with an S7-300, an S7-
400 or an OPC-based system, use an S7-300, S7-400 or OPC-based STEP 7 sys-
tem with at least version 5.1 with service pack 3 or higher - with NCM S7 for Indus-
trial Ethernet) for configuration.
Note
After startup, the CP 243-1 IT may automatically change the configured gateway
due to special network-based services ("ICMPRedirect"). After approx. 30 seconds,
the CP 243-1 IT returns to the originally configured gateway, however. This means
that the gateway actually used by the CP 243-1 IT may sometimes differ from the
one in the configuration.
You can change the gateway which the CP 243-1 IT is currently using with the di-
agnostic screen for the CP 243-1 IT in STEP 7 Micro/WIN 32 and a user program,
by reading from the memory area of the S7-200 CPU in which the NPB data block
is stored (see chapter 4.4.3).
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CP 243-1 IT
J31069-D0429-U001-A0-7618
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