Siemens SIMATIC ET 200AL, System Manual

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Configuration control (option handling)
7.3 Creating the control data record
Distributed I/O system
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System Manual, 08/2021, A5E31861578-AJ
Control data record
For configuration control of the ET 200AL distributed I/O system, you define a control data
record 196 V2.1, which contains a slot assignment for the modules. The table below shows
the structure of a control data record with explanations of the individual elements.
Table 7- 2 Configuration control: Structure of control data record 196
Byte Element Code Explanation
0 Block length 4 + (number of slots x 2) Header
1 Block ID 196
2 Version 2
3 Subversion 1
4 Slot topology module ET-
Connection1
1
The topology module ET-
Connection 1 is always located
on Slot 1.
Control element
Contains information on
which module is inserted in
which slot.
The following rule deter-
mines which value you must
enter in the respective byte:
•
If the module is included
in the station option, en-
ter the slot number of
the module.
• If the module does not
exist in the station op-
tion, enter 0.
5 Reserved
6 Slot 2 of the station master Slot assignment in the station
option
7 Reserved
: : :
38 Slot topology module ET-
Connection2
18
The topology module ET-
Connection2 is always located
on Slot 18
39 Reserved
40 Slot 19 of the station master Slot assignment in the station
option
41 Reserved
: : :
4 + ((max. slot - 1) x 2)) Maximum slot of the station
master
Slot assignment in the station
option
5 + ((max. slot - 1) x 2)) Reserved
Combination of configuration control and shared device (for PROFINET)
The configuration control function in a shared device is therefore only for the I/O modules of
the IO controller to which the interface module has subscribed. I/O modules that are assigned
to no controller or a different controller behave like a station without activated configuration
control.
In the control data record change the slots only for those modules that are assigned to the
IO-Controller.
In the control data record do not move modules to slots that are assigned to a different IO
controller or no IO controller. The interface module does not check whether a control data
record 196 exists for these slots. The interface module assumes a 1-to-1 assignment for these
slots.