Configuration control (option handling)
10.3 Transferring control data record in the startup program of the CPU
Distributed I/O system
182 System Manual, 09/2019, A5E03576849-AJ
10.3 Transferring control data record in the startup program of the CPU
Required steps
Transfer the created control data record 196 to the CPU/the interface module using the
instruction WRREC (Write data record) instruction.
Parameters of the instruction WRREC
Below, you will find explanations of individual parameters of the WRREC instruction which
you must supply with specific values in the configuration control context. You can find
additional information on the WRREC instruction in the STEP 7 online help.
ID Hardware identifier
• Use the HW identifier of the CPU for the configuration control for centrally ar-
ranged modules.
If you have selected the CPU in the network view or device view, the HW identifier
is available in the
tab of the Inspector window.
Use the value of the system constant "Local~Configuration".
• Use the HW identifier of the interface module for the configuration control for dis-
tributed I/O.
If you have selected the interface module in the network view or device view, the
HW identifier is available in the
tab of the Inspector window.
Use the value of the system constant "<Name_of_the_interface_module>~Head".
Data record number: 196 (decimal)
RECORD Control data record to be transferred.
See the section Creating the control data record (Page 171) for the structure of the
control data record.
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