Voltage Dip Of The Voltage Half-Wave Value - Siemens Simatic ET 200SP Manual

Interrupts/diagnostic alarms
14.4 Diagnostics response
The following table shows the parameter assignment for the example:
Table 14- 9
Parameter
Power quality analysis functions
Number of cycles for analysis
Diagnostics power quality
Determination of voltage swell and dip
Nominal value voltage
Voltage swell limit
If the module detects that the "Voltage swell limit value" has been exceeded:
● The module reports the diagnostics "Power quality" from "Number of cycles for analysis"
as long as there is a voltage swell.
● The module sets the qualifier bit 6 from "Number of cycles for analysis" as long as there
is a voltage swell.
● After the module has reset the diagnostics "Power quality" and reset the qualifier bit
again, Bit 1 is set.
As long as Bit 1 is set, the module returns the maximum value and the duration of the
voltage swell, e.g. in data record 160.
You reset Bit 1 with the bit "reset status "power quality"".
14.4.1.3

Voltage dip of the voltage half-wave value

Introduction
Voltage dips are short-term decreases in the line voltage which can occur, for example,
when switching on large consumers.
With the parameter "Number of cycles for analysis" you define how many measuring cycles
the voltage dip must be present until the module reports the voltage dip. If the voltage lies
above the "Voltage dip limit" again, the module sets the diagnostics "Power quality" and
resets the qualifier bit 5 again.
The AI Energy Meter HF returns the maximum value and the duration of the voltage dip, e.g.
in data record DS 160 (Page 259). The duration is determined exactly to ± 2 cycles.
In the event of voltage dip, the module reports a "Power quality" diagnostic. The module also
sets the qualifier bit 5 for the respective phase in data record DS 160. In the event of voltage
dip again, only the "Power quality" diagnostics is reported again and the duration, and if
applicable, the minimum voltage dip value is updated.
118
Parameter assignment
Analog input module AI Energy Meter 480VAC/CT HF (6ES7134-6PA00-0CU0)
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Manual, 07/2018, A5E42674880-AA