Parameter Assignment And Structure Of Parameter Data Record - Siemens SIMATIC ET 200SP Manual

A.2

Parameter assignment and structure of parameter data record

The data records of the module have an identical structure, regardless of whether you
configure the module with PROFIBUS DP or PROFINET IO.
Parameter assignment in the user program
You can reassign the module parameters in RUN. For example, the measuring range of
selected channels can be changed in RUN without having an effect on the other channels.
Changing parameters in RUN
The "WRREC" instruction is used to transfer the parameters to the module using data
record 128. The parameters set via the configuration do not change in the CPU, which means
the parameters set in the CPU are still valid after a restart.
Note
Changing parameters in RUN
A parameter data record that has content different from the startup parameter assignment
results in a brief exit from clocked measuring mode and renewed synchronization with the
fieldbus cycle. The slowest channel provides the "internal" measuring cycle.
Note
Changing parameter settings in runtime can cause the process values to freeze for the
duration of the parameter assignment for the module.
Output parameter STATUS
If errors occur when transferring parameters with the "WRREC" instruction, the module
continues operation with the previous parameter assignment. However, the STATUS output
parameter contains a corresponding error code.
You will find a description of the "WRREC" instruction and the error codes in the STEP 7 online
help.
Analog input module AI 2xU/I 2-/4-wire HF (6ES7134-6HB00-0CA1)
Equipment Manual, 05/21, A5E51055079-AA
A.2 Parameter assignment and structure of parameter data record
Parameter data record
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