Parameter Access Functionality; Job And Response Structure - Siemens SINAMICS G110M Manual

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5 Functional Mechanisms of this Application

5.2 Parameter access functionality

5.2

Parameter access functionality

Figure 5-7: Parameter access functionality

Acyclic parameter access occurs parallel to the cyclic process data exchange. This

saves resources, since the data is only established on demand, i.e. when a

parameter is to be transferred.

In the SIMATIC controller, the "Write data set" and "Read data set" functions must

be used for this. "Data set 47" must always be used.

Writing "data record 47" sends a job to the SINAMICS converter which performs

the job and provides a response. Reading "data set 47" makes the response of the

SINAMICS converter available in the SIMATIC controller so it can be evaluated.

The instructions "WRREC" and "RDREC" are used in the SIMATIC controller for

reading and writing data sets.

5.2.1

For the structure of the jobs and responses (data record 47) please refer to the

function manual "Fieldbus systems" (/6/).

Note

Since the structure of the data set to be sent or received depends on the number

of jobs and their number format, a generally valid structure cannot be used.

SINAMICS G120 DP at S7-1200

Entry-ID: 70155469,

V1.4,

07/2018

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