Scaling; Abbreviations Of The Data Sources - Siemens SENTRON VL Series System Manual

Data library

8.2 Scaling

8.2 Scaling
The measured values are always transferred as integer values (format "INTEGER" = "INT")
and never as Floating Point numbers (format "REAL"). These values can be signed. For this,
a scaling factor must be added in the case of some measured values so that the transferred
measured value can be correctly interpreted. The scaling factor to be displayed in each case
can be taken from the table shown below (from "data points").
Frequency example
The measured value of the current frequency (data point #262) varies between 15.00 and
440.00 Hz. The decimal places could not be communicated using the INTEGER format
without scaling. For this reason, the measured value is scaled with 10
between 1500 and 44000 is communicated. At the receiver end (PROFIBUS master), this
value must now be multiplied by the scaling factor corresponding to the exponent of 10 (-2,
multiplication by 10
factor.
8.3

Abbreviations of the data sources

Table 8- 1
Abbreviation
ETU
Meter. fct.
DI
DO
BDA
BSS
conf. DO
176
). The exponent at the receiver end is always specified for the scaling
-2
The following abbreviations are used in the data sources:
Meaning
Electronic trip unit
Metering function or metering function PLUS
Digital input module
Digital output module
Breaker Data Adapter PLUS
Breaker Status Sensor
Configurable digital output module
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
, and a value of
2