A-180
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
7 Programming FCs (Functions) and FBs for S7
Ethernet CPs
The interface to several communication services is implemented by ready-made
program blocks (FCs and FBs). This chapter includes a detailed description of
these blocks.
The description of each FC / FB includes the following sections and these may be
extended by further information specific to the FC / FB:
Meaning
Call Interface
How the Block Works
Explanation of the Formal Parameters
Condition Codes
This chapter provides you with information over and above the general information
available in the online help for the FCs when programming in STEP 7.
You will find further information in the following sources:
The communication FBs (BSEND, BRCV, PUT, GET, USEND, URCV,
C_CNTRL) for programming S7 communication are described in the STEP 7
Documentation /8/.
Sample configurations and programs are available for the SEND/RECEIVE
interface described here:
In the sample project PROJECT_ETHERNET that you can start immediately
after installing NCM S7; for a description, refer to the Primer.
On the Internet as downloadable sample projects; refer to the information in
Appendix C “Support and Training”.
The Quick Start CD that can be ordered separately is a
treasure-trove of sample programs and configurations.
You can order this directly on the Internet at:
http://www4.ad.siemens.de/WW/news/en/574211
Entry ID: 574211
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