Parameter Assignment - Siemens SIMATIC ET 200SP Manual

Parameter data record
A.2 Parameter assignment
A.2

Parameter assignment

Parameter assignment in the user program
You can re-configure the module in RUN. You can, for example, change voltage or current
values in single channels in RUN without this change having an effect on the other channels.
Note
Following a firmware update, you need to re-configure the I/O module before you can use the
new functions.
Changing parameters in RUN
The "WRREC" instruction is used to transfer the parameters to the module using data record
128. The parameters set in STEP 7 are not changed in the CPU, which means the parameters
set in STEP 7 are valid again after a restart.
In addition, the data records 0 and 1 are available which contain the channel-specific
parameters for channel 0 (data record 0) and channel 1 (data record 1). These data records
allow for the fastest, channel-specific parameter assignment in RUN.
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.
STATUS output parameter
The module ignores errors that occur during the transfer of parameters with the "WRREC"
instruction and continues operation with the previous parameter assignment. The STATUS
output parameter contains a corresponding error code.
The description of the "WRREC" instruction and the error codes is available in the STEP 7
online help.
See also
Description of parameters (Page 26)
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Analog input module AI 2xSG 4-/6-wire HS (7MH4134-6LB00-0DA0)
Manual, 09/2018, A5E41867508A-AB