Quality Information - Siemens simatic et200sp Manual

See also
Reading measured values from user data cyclically (Page 40)
Read measured value from a measured value data record (Page 42)
6.2

Quality information

Introduction
The AI Energy Meter 480VAC ST supplies quality information about the measurement in a
status word. This information can be used to evaluate the status:
● Currents (I
● Operating quadrants for each of the 3 phases
● Direction of rotation of the 3-phase system
Quality information for 3-phase system
The module saves the quality information that can be evaluated under the measuring value
ID 65503 as a bit string in 2 bytes.
You can access the quality information via:
● User data variant "Basic variables quality values three-phase measurement (ID 240 or
F0
● User data (measured value ID 66503)
● Measured value data record 150
In addition you can evaluate the quality information for the low byte in all the user data
variants for the module version 32 I / 12 Q.
Quality information for individual phases
You can also evaluate the quality information for individual phases via the measured value
data records 147 to 149 or use the user-defined user data variant. You obtain the phase-
specific quality information for the user-defined user data variant under:
● Measured value ID 65500 for Phase 1 (Channel 0).
● Measured value ID 65501 for Phase 2 (Channel 1).
● Measured value ID 65502 for Phase 3 (Channel 2).
In contrast to the allocation for measured value 65503, the measured value IDs only contain
the phase-specific information for current, voltage and operating quadrant. The information
about the other phases and the rotating field have the value 0.
Analog input module AI Energy Meter 480VAC ST (6ES7134-6PA20-0BD0)
Manual, 12/2015, A5E36061895-AA
, I , I ) and voltages (U
L1 L2 L3
)
H
Reading and processing measured values
, U , U ) lie within the valid measuring range
1 2 3
6.2 Quality information
37