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03/03
4.2
Value Ranges of the Configuration Data
4.2.1
IP Addresses
The IP addresses which must be specified at various points in the configuration
must comply with the general conventions governing the validity of IP addresses.
According to this convention, the following IP addresses have a special signifi-
cance.
• Loopback:
• Class D addresses:
• Class E addresses:
• Broadcast addresses:
The CP 243-1 IT does not accept these addresses. The only exception is the loop-
back address 127.0.0.1 which can be used during configuration of the FTP client
service. This causes data to be transferred between the memory of the local S7-
200 CPU and the file system of the local CP 243-1 IT when the appropriate func-
tion is called.
4.2.2
Subnet Mask
If a subnet mask is specified in the configuration, its layout must comply with the
general conventions governing the validity of subnet masks.
Remember that the validity of an IP address and a related subnet mask are de-
pendent on each other.
4.2.3
TSAPs
TSAPs consist of 2 bytes. The first byte specifies the connection. The second byte
is created from the rack number and the slot of the communications module. The
following value ranges apply to the first byte.
• Value range, local TSAP:
• Value range, remote TSAP:
The CP 243-1 IT does not check the layout of the second byte.
CP 243-1 IT
J31069-D0429-U001-A0-7618
127.0.0.0 - 127.255.255.255
224.0.0.0 - 239.255.255.255
240.0.0.0 - 247.255.255.255
Example: 255.255.255.255
16#02, 16#10 - 16#FE
16#02, 16#03, 16#10 - 16#FE
Configuration
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