Siemens SIMATIC NET CP 243-1 Technical Manual page 36

Configuration
Defining the address of the control byte and the number of connections
Use the next mask to specify the address of the byte in the memory address space
of your S7-200 system from which the CP 243-1 can be addressed from the
S7-200 CPU. This address depends on the position of the CP 243-1 in your
S7-200 system and on the number of outputs in your S7-200 system. If, when you
began configuring the system, you had the Ethernet Wizard determine the position
of the CP 243-1 in your S7-200 system, the Wizard will now provide you with the
address to be used.
Basically, you can determine the memory address spaces occupied by the mod-
ules present in your S7-200 system by enabling the "Information..." entry in the
"Target system" menu in STEP 7 Micro/WIN 32. In this manner you will also find
the address under which your CP 243-1 can be addressed in your S7-200 system.
In this mask, you can also define the maximum number of connections your
CP 243-1 should maintain in parallel at any one time. Up to 8 such connections
can be maintained. A mask in which you can configure the connection then ap-
pears for each connection you specify here.
Configuring the individual connections
The connections that you established in the previous mask are configured in the
masks that follow. For each connection, you must first define whether your S7-200
system should be operated as a client or server. This will determine the structure of
the mask.
If your S7-200 system is to be operated on the connection as a client, then you
must specify the address of the communication partner and the communications
end point ("TSAP") in this partner. Moreover, in an additional mask, you must spec-
ify which data are to be exchanged between your S7-200 system and the specified
communication partner. At this point you also define whether these data are to be
read or written. Up to 32 read/write commands can be defined per connection.
If your S7-200 system is operated on the connection as a server, then you can de-
fine to which communication partner you wish to grant access to your system by
assigning an IP address. However, you can also set each server so that it always
grants access from any IP address. You must also define the communications end
point ("TSAP") in your communication partner from which you grant access to your
S7-200 system.
A Keep Alive system can be enabled for both client and server connections.
Please use the communications end points ("TSAPs") of your communication part-
ner specified in the configuration of that partner. In an S7-200 system, it is gener-
ated using STEP 7 Micro/WIN 32. In an S7-300, S7-400 or OPC-based system,
use STEP 7 to do so (see also Chapter 4.4).
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CP 243-1
J31069-D0428-U001-A1-7618