Siemens SIMATIC NET CP 243-1, Operating Instructions Manual

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Configuration
3.5 Configuration of a communications partner with STEP 7
CP 243-1
88
Operating Instructions, 03/2012, C79000-G8976-C244-02
Note
•
Comments are inserted in the file with the # character.
•
An empty user entry is stored in the .fdb file in the following format: xx||||||| (where xx
stands for the current FTP client request number)
•
The last character of a line is \n.
•
All ASCII characters between 0x21HEX and 0x7E HEX can be used for the path, file
name, user name and password if they are accepted by the communications partner
involved.
•
The following restrictions also apply to the path and file name:
•
The following characters are not supported: blank ; \ ; / ; | ; < ; > ; " ; : ; * and ?
•
Empty lines are not permitted.
NOTICE
With a READ action, <number_of_bytes> is usually between 0 and 10240 (maximum for
CPU 226XM).
If the value 0 is entered, the CP 243-1 does not check the actual file length. All data in the
file is read and, starting with <DB_start_address>, copied to the DB of the S7-200 CPU if
this does not exceed the memory size.
If the number of data bytes to be read is not 0, the CP 243-1 checks during the data
transfer whether the specified number of bytes has already been reached and, if it has,
terminates copying. This guarantees a high degree of safety and protects the unprotected
memory area of the S7-200 CPU from being overwritten accidentally.
3.5 Configuration of a communications partner with STEP 7
Based on the example of an S7-300 system, this section describes the configuration steps
necessary in STEP 7 so that such a system can communicate with an S7-200 system via the
relevant Ethernet communications processor. The procedure is similar for S7-400 systems.
For detailed information on the configuration steps, refer to the STEP 7 description or the
manuals of the CP 343-1 and CP 443-1.
In S7-300 and S7-400 systems, a distinction is made between configured and free
connections. With configured connections, the connection parameters are specified by the
user. Free connections, on the other hand, do not need to be configured in STEP 7.
Configured connections
If you want to use a configured connection, first insert a new S7 connection in the STEP 7
program packet NetPro. In the "Insert New Connection" dialog, specify the type of station to
which you want to establish a connection. As connection partner, select the type
"unspecified".