PROFIBUS-DP - Parameterization in DIGSI
71
SIPROTEC PROFIBUS-DP - Communication profile
C53000-L1840-B001-03
4.3.2 Number representation depending on the parameterization
For specification of the scaling of a measured value it must be known in which number
format (number of the relevant fractional digits) the measured value is available in the
SIPROTEC device and to which unit it refers.
Percentage value A scaling factor of 100 is recommended for percentage values.
With that the "Measured value
Integer
" in the PROFIBUS-DP message has to be
interpreted as:
+/- 32767 corresponds to +/- 327.67 %
Secondary value The transmission of a measured value as secondary value is meaningful only in few
cases (e.g. transducer measured values in mA).
The number of significant fractional digits depends on the installations and trans-
ducers data.
Primary value The number of relevant fractional digits and the respective unit for primary values
depends tightly on the parameterized nominal values of the primary equipment
(DIGSI: Power system data 1 and Power system data 2).
Voltages: V
a
, V
b
, V
c
, V
a-b
, V
b-c
, V
c-a
, 3V
0
, V1, V2
Displacement voltages: V
N
Note:
The following parameter numbers apply to the devices 7SJ61...7SJ64 and are partly
divergently for other device types.
Parameter: 1101 Nominal operation voltage of primary equipment
Parameter area Number representation / unit
1.00 ... 10.00 kV 0.00 ... 99.99 kV
10.01 ... 100.00 kV 0.0 ... 999.9 kV
100.01 ... 1000.00 kV 0 ... 9999 kV
greater than 1 MV 0 ... 99.99 MV
Parameter: 0202 Voltage transducer - Primary voltage
0206 Ratio factor V
ph
/V
delta
Product of parameters 0202 and 0206 Number representation / unit
100.00 ... 1000.00 V 0 ... 9999 V
1.01 ... 10.00 kV 0.00 ... 99.99 kV
10.01 ... 100.00 kV 0.0 ... 999.9 kV
100.01 ... 1000.00 kV 0 ... 9999 kV
greater than 1 MV 0.00 ... 99.99 MV
To Next Page
Loading...
Need help?
General