Current Diagnostics; Diagnostics: Overload - Siemens Simatic ET 200SP Manual

The following table shows the parameter assignment for the example:
Table 14- 13 Parameter assignment
Parameter
Power quality analysis functions
Determination of voltage peak value L1
Determination of voltage peak value L2
Determination of voltage peak value L3
The module detects the voltage peak in phase 1 and sets the qualifier bit 2 for phase 1. You
can find the maximum voltage value, for example, in the data record DS 160 in bytes 174 to
177 ("Voltage peak value L1").
14.4.2

Current diagnostics

14.4.2.1

Diagnostics: Overload

Introduction
As long as one of the following conditions is met, the module reports the diagnostics
"Overload" for each phase:
● If the tolerance value measured current parameterized for each phase is exceeded for the
tolerance time overcurrent parameterized for each phase.
● If the maximum measured current of the AI Energy Meters HF is exceeded:
– Secondary measured current: 12 A
Calculation of tolerance value measured current
The tolerance value measured current is calculated with the following formula:
Tolerance value measured current = "Nominal value current" + ("Tolerance factor
overcurrent [%]" × "Nominal value current")
The "Nominal value current" is the primary current at the operating point.
Analog input module AI Energy Meter 480VAC/CT HF (6ES7134-6PA00-0CU0)
Manual, 07/2018, A5E42674880-AA
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Interrupts/diagnostic alarms
14.4 Diagnostics response
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