Siemens simatic et200sp Manual page 41

Example
The user data variant 254 (FE
480VAC ST. The measured value for "Current L1" should be read.
Table 6- 1 Total power L1L2L3
Byte Allocation
0 User data variant
1 Quality information = QQ
2 ... 3 Current L1
4 ... 5 Current L2
6 ... 7 Current L3
: :
24 Scaling current L1
25 Scaling current L2
26 Scaling current L3
: :
31 Scaling total reactive energy L1L2L3
In the user data variant FE
3. The current is supplied by the module as a 16-bit-fixed-point number in the value range
from 0 to 65535 in the unit 1 mA. In addition the scaling factor for the current L1 has to be
considered additionally. The module supplies the related scaling factor in Byte 24.
The actual value for current L1 is calculated as follows:
Actual value for current L1 = Current L1 x 10
See also
Basics for reading measured values (Page 35)
Analog input module AI Energy Meter 480VAC ST (6ES7134-6PA20-0BD0)
Manual, 12/2015, A5E36061895-AA
) "Total power L1L2L3" is configured on the AI Energy Meter
H
Data type
BYTE
I U I U I U BYTE
1 3 3 2 2 1 1
UINT
UINT
UINT
:
USINT
USINT
USINT
:
USINT
(254) the measured value for the current L1 is stored in Byte 2 +
H
Reading and processing measured values
6.3 Reading measured values from user data cyclically
Unit
-
Bit string
1 mA
1 mA
1 mA
:
-
-
-
:
-
Scaling current L1
Value range Measured
value ID
254 (FE ) -
H
qq xx xx xx -
0 ... 65535 66007
0 ... 65535 66008
0 ... 65535 66009
: :
0 ... 255 -
0 ... 255 -
0 ... 255 -
: :
0 ... 255 -
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