Method for monitoring a condensor pressure protection curve with a polygon function

A PLC safety monitoring system configured for monitoring a condenser pressure protection curve with a polygon function of a turbine, and configured for reading in a first measurement value and a second measurement value, the PLC safety monitoring system comprising:

• a normalization module configured for normalizing the second measurement value to a value scale of the first measurement value,
• a comparator module configured for comparing the first measurement value with the normalized second measurement value, and configured for generating an output signal in response to capturing the first measurement value being exceeded by the normalized second measurement value,
• wherein the first measurement value and the second measurement value change synchronously,
• wherein the first measurement value and the second measurement value are pressure measurement values.