Which data type in a PLC is capable of representing numbers with a decimal point?

In a Programmable Logic Controller (PLC), the data type that can represent numbers with a decimal point is the REAL data type. This type is specifically designed to handle floating-point values, allowing for a range of decimal places. This capability is essential in applications where precision is required, such as in temperature readings, pressure measurements, or any calculations that require fractional values.

The INTEGER data type, however, is meant for whole numbers, lacking the ability to express decimal values, which makes it unsuitable when fractional representation is necessary. The STRING data type is utilized for text and character data, not numeric values, while the BOOLEAN data type serves to represent true or false states, again not suited for numeric values. Therefore, the REAL data type is the only one capable of storing numbers with decimal points effectively.