Programming - Siemens SIMATIC S7-CPs Manual

Downloading configuration data
It is possible to download the configuration data to the CP via MPI or
LAN/Industrial Ethernet.
2.4

Programming

Programming − FCs / FBs
For some communications services, there are pre-programmed blocks (FCs/FBs)
available as the interface in your STEP 7 user program.
Please refer to the documentation of the FCs / FBs in the online help of STEP 7 or
in the manual /10/.
Notice
We recommend that you always use the latest block versions for all module types.
You will find information on the current block versions and the current blocks to
download from the Internet in our customer support.
http://support.automation.siemens.com/WW/view/en/8797900
With the older module types, this recommendation assumes that you are using the
latest firmware for the particular block type.
Using blocks for the SEND/RECEIVE interface
For data transfer on the SEND/RECEIVE interface, there are FCs for short and
long blocks of data:
For fast data transmission up to a data length of 1452 bytes, the SPEED
SEND/RECEIVE blocks AG_SSEND FC53 and AG_SRECV FC63 are supported.
Table 2-3
Function
Transfer of data fields <= 240 bytes
Transfer of data fields > 240 bytes
Accelerated transfer of blocks of data <=
1452 bytes
CP 443-1 for Industrial Ethernet / Manual Part B
Release 07/2010
C79000-G8976-C223−06
Requirements
S
You require the blocks AG_SEND FC5 and AG_RECV
FC6 or alternatively the blocks AG_LSEND FC50
and AG_ LRECV FC60.
S
You require the blocks AG_LSEND FC50 and
AG_LRECV FC60.
S
You require the blocks AG_SSEND FC53 and
AG_SRECV FC63.
2 Requirements for Use
B−13