Measured Value Telegrams - Siemens SICAM P 7KG7755 Manual

Data Mapping
cos φ
3.1.2

Measured Value Telegrams

26
The Power Factor cos
• a sign which indicates demand or supply power and
• an inductive or capacitive marking.
Example for inductive load and delivered power:
cos φ -1.000 ind
In the cos φ values which are transmitted via IEC 60870-5-103 only the capacitive/
inductive information is contained using the sign of the value:
• negative cos
φ : capacitive
• positive cos
φ
: inductive.
For the above shown example, the positive 100 % value is transmitted.
The measured values of the SICAM P 7KG7750/55 device are transmitted via IEC
60870-5-103 using seven different telegrams.
Depending on the selected Network type (ref. to Figure 3-1), the parameters to the
transmisson of the harmonics (see chapter 2.1.2) and the assembled I/O modules
either all or only a selected number of these telegrams are sent to the IEC 60870-5-
103 master on request of class 2 data.
Please refer to chapter 3.1.2.9 for more information about the relation of the selected
parameters and the transmitted telegrams.
Note (valid for version 4.10 and higher):
In the case of overflow:
• the overflow flag is set,
• the measured value is set to its maximum positive or maximum negative value
respectively.
The measurands telegrams are defined as follows (see next sections):
φ is shown at the device display with
Power Meter, IEC 60870-5-103, Manual
E50417-B1076-C375-A4, Release 11.2012