Rules - Siemens SIMATIC S7-1500 System Manual

Flexible automation concepts
9.2 Configuration control
9.2.1

Rules

General rules
Observe the following rules:
● Slot entries in the control data record outside the station master are ignored by the
CPU/interface module.
● The control data record must contain the entries up to the last slot of the station option.
● Each slot may only be present once in the control data record.
● Each slot may only be assigned to one slot in the station master.
● System power supplies (PS) can also be subject to configuration control.
Note
Configuration control for system power supplies
In the case of a configuration loaded using a data record, STEP 7 does not automatically
check compliance with the power budget.
Make sure that the power fed into each power segment of the station option is greater
than or equal to the power extracted.
You will find more information in the section Power balance calculation (Page 34).
Special features of the ET 200MP distributed I/O system
● If you have enabled configuration control, the ET 200MP station is not ready for operation
without a control data record. As long as no valid control data record is transferred, the
I/O modules are considered as failed by the CPU and exhibit substitute value behavior.
The interface module continues to exchange data.
● You transfer the control data record with WRREC to the interface module (slot 1/
submodule 1). You address the interface module as follows:
– With the diagnostics address in STEP 7 V5.5
– With the HW identifier in STEP 7 (TIA Portal)
● The control data record is retentively stored in the interface module. Note:
– If there have been no changes to the configuration, you do not need to rewrite the
– If you write a control data record with modified configuration, it will result in a station
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You can find the diagnostics address in the properties header of the interface module
in the hardware configuration.
If you have selected the interface module in the network view or device view, the HW
identifier is available in the System constants tab of the Inspector window. Use the
value of the system constant '<Name_of_the_interface_module>~Head'.
control data record 196 during restart.
failure in the distributed I/O system. The retentively saved original data record 196 will
be deleted and the new data record 196 will be saved retentively. The station will then
restart with the modified configuration.
Automation system
System Manual, 12/2014, A5E03461182-AC