95
= Key1
= Key 2
= Key 3
= Max. value or consumption = Min. value or supply
Within the UMG 505 almost all measured values are
available in floating point format (Table 2). For the
transmission of measured values the floating point
values are recalculated in integer format by the
UMG 505, such as char, int and word (Table 4).
To lose no digits after decimal point, the value, that
should be transmitted, is scaled. The opening value
from UMG 505 is calculated as follows:
Measured value = Transmitted value * Factor
The scales of the measured values are calculated
from UMG 505 out of current and voltage
transformer ratio. Here the minimum definition of the
transmitted value of 0,1% is strived for.
The scales of the UMG 505 can be retrieved under
the following addresses:
Example
Transmitted value UMG 505
= 2301
Programmed scale
= -1
Which voltage is measured by the UMG 505?
From the scale table, you can read the factor =/10
for scale=-1:
Measured value = Transmitted value * Factor
Measured value = 2301 * 1/10
Measured value = 230,1V
The measured voltage is 230,1V.
Measured values
Address
(dez)
r/w
1)
Format
Possible scale
Currents
9100
r
word
-3 .. 6
Voltage
9101
r
word
-3 .. 6
Power
9102
r
word
-3 .. 6
Cos(phi)
9103
r
word
-3
Frequency
9104
r
word
-2
THD
9105
r
word
-3
10 scale factors are at your disposal:
Scale
Factor
-3
/1000
-2
/100
-1
/10
0
1
1
* 10
2
* 100
3
* 1 000
4
* 10 000
5
* 100 000
6
* 1000 000
The scale of energy is determined by the scale of
power
1) r/w = read/write
Table 9, Scale
Scale of measured values, which are called in integer format.
