Modifying Sm 335 Parameters In Run; Hw Config; Data Sets; Data Set 1 (Ds31) - Siemens SIMATIC S7-300 Manual

3.3

Modifying SM 335 parameters in RUN

HW Config

You can modify certain (dynamic) parameters while the CPU is in RUN state.
You can transfer the SM 335 parameters by calling
● SFC55 "WR_PARM" (central, distributed PROFIBUS)
● SFB53 "WRREC" (central, distributed PROFIBUS/PROFINET)
For additional parameterization options, refer to the System and Standard Functions for S7-
300/400 (http://support.automation.siemens.com/WW/view/en/1214574) Reference Manual.
Parameters
The SM 335 parameters have a length of 16 bytes which are split into two data sets (DS0
and DS1).
Save the SM 335 parameters (complete DS1 that is to be transferred to the module) to a
data area on the CPU (e.g. bit memory, data block). Transfer the parameters to SM 335 with
the help of SFC 55 "WR_PARM" or SFB53 "WRREC".

Data sets

The SM 335 parameters are stored in two data sets (DS0 and DS1).
Data set 0 (DS0)
Data set 0 of SM 335 has a length of 2 bytes and contains the static parameters of SM 335.
You cannot modify those parameters.

Data set 1 (DS31)

Data set 1 contains the dynamic parameters of SM 335 which you can modify.
NOTICE
The transfer always has to include the entire data set 1 (bytes 0 to 13).
SM 335 - High-speed analog mixed module for SIMATIC S7-300
Manual, 02/2009, A5E02409063-01
Data exchange with SM 335
3.3 Modifying SM 335 parameters in RUN
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