Configuration
3.3 Configuring a CP 243-1 with STEP 7
CP 243-1
Operating Instructions, 03/2012, C79000-G8976-C244-02
59
Specifying TCP/IP address parameters and transmission type
In the next dialog, you specify the TCP/IP address parameters and the type of transmission
to be used.
There are two ways of entering the TCP/IP address parameters:
1. Enter these parameters manually in the relevant input boxes.
2. Enable access to a BOOTP/DHCP server. In this case, the CP 243-1 obtains its TCP/IP
address parameters from a BOOTP/DHCP server during startup. If the CP 243-1 is
unable to find a BOOTP/DHCP server in your TCP/IP network, it performs a reset,
restarts and tries again to establish contact with a BOOTP/DHCP server. It repeats this
until it finds a BOOTP/DHCP server from which it can obtain TCP/IP address parameters.
Specifying the module command byte and the number of S7 point-to-point links
In the next dialog, you enter the address of the bytes in the address area of your S7-200
system via which the CP 243-1 can be accessed by the S7-200 CPU. This address depends
on the position of the CP 243-1 in your S7-200 system and the number of outputs in your S7-
200 system. If you used the wizard to search for the position of the CP 243-1 in your S7-200
system at the beginning of the configuration, the wizard will set the address to be used here.
You can always use STEP 7 Micro/WIN 32 to identify the address areas occupied by the
modules in your S7-200 system by enabling the entry "Information…" in the "PLC" menu.
This also finds the address with which your CP 243-1 can be accessed in your S7-200
system.
In this dialog, you also specify how many S7 connections need to be set up on your CP 243-
1. Up to 8 such connections are possible. A dialog appears for each connection that you
specify here. You can then configure the connection in this dialog.
Configuring the individual S7 connections
The following dialogs are used to configure the S7 connections that you set up in the
previous dialog. First, specify for each of these connections whether your S7-200 system will
be client or server. The layout of the dialog changes according to the option you choose.
If you want your S7-200 system to be a client on a connection, enter the address of the
communications partner and the Transport Service Access Point (TSAP) for this partner. In
an additional dialog, you also need to specify the data to be exchanged between your S7-
200 system and the specified communications partner. Here, you also specify whether this
data will be read or written. Up to 32 read/write requests can be specified per connection.
If you want your S7-200 system to be a server on a connection, you can assign an IP
address to specify which communications partner will have access to your system. You can
also set each server so that it allows access from every IP address. You must also specify
the transport service access point (TSAP) in the communications partner you are allowing to
access your S7-200 system.
Keepalive monitoring can be enabled for both client and server connections.
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