Application and functions
1.3 Requirements for use
CP 443-5 Extended
16
Manual, 11/2018, C79000-G8976-C162-09
Note
Changing bus parameters
If you change the bus parameters in the configuration data, you must not load this
configuration data on the CP via PROFIBUS!
1.3.4
Programming
Program blocks
For some communications services of the CP, there are preprogrammed program blocks
(FCs / FBs) available as the interface in your STEP 7 user program.
Refer to the documentation of the program blocks in the online help of STEP 7 or in the
Note
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 at the following address:
Link: (
https://support.industry.siemens.com/cs/ww/en/ps/15677/pm
With older module types, this recommendation assumes that you are using the latest
firmware version for the particular module type.
Program blocks for open communications services
Program block
Meaning
AG_SEND (FC5)
Send data
AG_RECV (FC6)
Receive data
AG_LSEND (FC50)
Send data
AG_LRECV (FC60)
Receive data
Program blocks for S7 communication
Program block
Meaning
USEND (SFB 8) / URCV (SFB 9)
Uncoordinated sending / receipt of data
BSEND (SFB 12) / BRCV (SFB 13)
Block-oriented sending / receipt of data
PUT (SFB 14) / GET (SFB 15)
Write data to a remote CPU / read data from a
remote CPU
