The basic data types supported by the Siemens S7-1200 include the following:
Boolean data is a one-digit binary number, the value of which is 0 or 1, and the constant value of the data is TRUE, FALSE, 0, 1, etc. Byte-based data is an eight-digit binary number, and the value scale can be from 16 decimal 00 to 16 decimal FF, for example, hexadecimal 12, 16 AB, etc. The font data is a sixteen-digit binary number, and the value scale is from four 0s in hexadecimal to four F in hexadecimal, and constants such as hexadecimal 0012 and hexadecimal ABCD.
The double-character data is a 32-bit binary number, and the value scale is eight zeros in hexadecimal to eight F in hexadecimal. The character data is 8-bit binary data, and the value scale is from hexadecimal 00 to hexadecimal FF. The short integer data is eight-digit signed data, and the value scale is -128 to 127. The integer data is 16-bit signed data, and the value range is -32768 to 32767. The double-integer data is 32-bit signed data, and the value scale can be -2 to the 31st power of 2 minus 1.
Unsigned short integer data is eight-digit data, with a value scale of 0 to 255. The unsigned integer data is 16-bit data, and the value scale is 0 to 65535. Unsigned double integer data is 32-bit data, and the value scale is 0 to 2 to the 32nd power minus 1; Real numbers are 32-bit data with decimal points; Long real numbers are 64-bit data, which has a larger value scale than 32-bit real numbers. Time-based data is 32-bit data, and its pattern is T#, day, hour, minute, second, and millisecond.
String data is string data from 0 to 254 bytes, and its number of bits is variable. DTL data is a 12-byte structure that holds date and moment information in a predefined structure. In addition, the BCD code digital pattern will be used, which cannot be used as a data type, but they support the conversion instructions; Sixteen-digit BCD codes with digitic scales from -999 to 999, and 32-digit BCD codes with digitic scales from -9999999 to 9999999.
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