
7 Configuring FDL Connections / Programming the SEND/RECEIVE Interface
A−151
S7-CPs for PROFIBUS Configuring and Commissioning
Release 09/2011
C79000−G8976−C181−05
Additional functions on unspecified connections
− When receiving
Enters the sender and the FDL service in the job header.
− When sending
Evaluates the job header and addresses the partner, executes the selected
FDL service,
Requirement for Configuration
The PROFIBUS CP of the local and remote station were entered in the hardware
configuration and networked with the subnet.
Notice
If you want to use FDL connections, the CP mode of the PROFIBUS CP must not
be set to DP slave passive!
All stations outside the project must be configured with substitute objects (for
example “S5” or “other station”).
Priority of the Frames
Remember that the PROFIBUS CPs for SIMATIC S7 send frames with “LOW”
priority.
Partner stations (SIMATIC S5 or non-SIMATIC stations) must also use the LOW
priority otherwise no connection can be established.
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