Siemens S7-1500 - Electromagnetic compatibility

Configuration, programming
4.7 Setting up FTP communication
CP 1543-1
Operating Instructions, 05/2017, C79000-G8976-C289-07
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Reading/writing via DBs of the CPU
To transfer data with FTP via data blocks, create the required DBs in the CPU. Due to their
special structure, these are known as file DBs.
When it receives an FTP command, the CP acting as FTP server queries its assignment
table to find out how the data blocks used for file transfer in the CPU will be mapped to files.
You make the data block assignment in the STEP 7 configuration of the CP (FTP
configuration).
Figure 4-1 S7 CPU with CP 1543-1 as FTP server for the S7 CPU data
DB assignment in STEP 7
The fields of the table in the data block assignment in STEP 7 have the following meaning
and syntax:
Column title
CPU
DB
File name
Comment
Meaning
Assignment of the CPU
Selectable from drop-
down list
No. of the data block
(file DB)
Selectable from drop-
down list
The file name assigned
to the file DB
Automatic name pro-
posal; entry can edita-
ble.
Informal comment
Example
cpu1 [PLC_1] 20 cpu1_db20.dat Measured values plant
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