Voltage Diagnostics; Diagnostics: Overflow/Underflow - Siemens Simatic ET 200SP Manual

Interrupts/diagnostic alarms
14.4 Diagnostics response
14.4.1

Voltage diagnostics

14.4.1.1

Diagnostics: Overflow/underflow

Introduction
You use the parameter "Tolerance factor overvoltage/undervoltage" to define a tolerance
range around the set nominal value voltage at the operating point. If the effective value of the
primary voltage exceeds this tolerance range, the module reports the diagnostics "overflow"
or "underflow".
Calculation of tolerance value measuring voltage
The tolerance value measuring voltage is calculated with the following formula:
Tolerance value measuring voltage = "Nominal value voltage" ± ("Tolerance factor
overvoltage/undervoltage [%]" × "Nominal value voltage")
The "Nominal value voltage" is the primary voltage at the operating point.
Parameter assignment
The following table shows the necessary parameters:
Table 14- 6
Parameter
Power quality analysis functions
Diagnostics overflow
Diagnostics underflow
Nominal value voltage
Voltage transformer primary voltage
Voltage transformer secondary voltage
Tolerance factor overflow/underflow
114
Parameter assignment
Analog input module AI Energy Meter 480VAC/CT HF (6ES7134-6PA00-0CU0)
Enable
Enable
Enable
1 ... 999999 V
1 ... 999999 V
1 ... 500 V
10 ... 50%
Manual, 07/2018, A5E42674880-AA