Siemens SIMATIC ET 200AL, System Manual

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Functions
5.5 Intelligent DP slaves (I-slaves)
PROFIBUS with STEP 7 V13
84
Function Manual, 12/2014, A5E03775446-AC
5.5.4 Configuring transfer areas
Requirements for configuring transfer areas
● You have configured an I-slave in STEP 7.
● You are in the device view of the I-device and have selected the PROFIBUS interface of
the communications module.
Procedure for configuring transfer areas
To configure transfer areas for an I-slave in STEP 7, follow these steps:
1.
In the area navigation, go to the section "Operating mode" > "I-slave communication" >
"Transfer areas".
2. Create transfer areas. Set the properties of the created transfer areas.
①
Click in the first cell of the "Transfer area" column. STEP 7 assigns a default name that you
can change.
②
Select the type of communication relation: Currently, you can only select MS for
"master-slave communication relation".
③
STEP 7 assigns the addresses for the transfer area automatically. Correct the addresses if
necessary.
④
Set the length of the transfer area. Specify the length of the transfer area in the cell in the
following format: [1...64] Byte/Word.
Examples: "32 Byte", "64 Word"
⑤
Specify whether the transfer area is exchanged in units of bytes or words or consistently
over the entire length between the DP master and I-slave.
Figure 5-16 Configuring transfer areas
A separate entry is created in the area navigation for each transfer area. If you select one of
these entries, you can adjust the details of the transfer area, or correct them and comment
on them.