Measured Values - Siemens SIPROTEC 7SJ61 Manual

Notes to SIPROTEC objects
1.3

Measured values

Reference
14
Note
Depending on the device composition not all of the indicated analog inputs (and cor-
responding IEC 60870-5-103 mapping entrys) may be available in the SIPROTEC de-
vice.
For the transmission of measured values, the compatible range and the private range
can be used. Are there several measurement telegrams parameterised then these are
transferred cyclically after each other.
Note
If all parameterised measurement telegrams aren't transferred, the parameter Scan-
ning period (in ms) for measurements must be put on a greater value.
The range of the values which can be transmitted is mostly +/-240% or +/-2.4 of the
rated value. The value in data unit 9 has 13 bit (1 sign, 12 bit data). That means that
+/- 4096 indicates +/- 240% of the measured value. Some following measured values
use a different definition:
• cos Phi: -4096 relates to cos PHI = -1; +4096 relates to cos PHI = +1
• IEE real, IEE reactive: -4096 relates to IEE = -800 mA; +4096 relates to
IEE = +800 mA
Changes of the scaling of the measured values are possible in adaptation to the con-
crete installation environment (ref. to manual "IEC 60870-5-103 Communication data-
base").
Refer to chapter 3.3
7SJ61 / 7SJ62 / 7SJ64 Bus mapping
C53000-L2540-A306-2